---
_id: '17423'
abstract:
- lang: eng
  text: We introduce an algorithm to reconstruct a mesh from discrete samples of a
    shape’s Signed Distance Function (SDF). A simple geometric reinterpretation of
    the SDF lets us formulate the problem through a point cloud, from which a surface
    can be extracted with existing techniques. We extract all possible information
    from the SDF data, outperforming commonly used algorithms and imposing no topological
    or geometric restrictions.
article_number: '23'
article_processing_charge: No
author:
- first_name: Silvia
  full_name: Sellán, Silvia
  last_name: Sellán
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Christopher
  full_name: Batty, Christopher
  last_name: Batty
- first_name: Oded
  full_name: Stein, Oded
  last_name: Stein
citation:
  ama: 'Sellán S, Ren Y, Batty C, Stein O. Reach for the arcs: Reconstructing surfaces
    from SDFs via tangent points. In: <i>SIGGRAPH ’24: Special Interest Group on Computer
    Graphics and Interactive Techniques Conference</i>. Association for Computing
    Machinery; 2024. doi:<a href="https://doi.org/10.1145/3641519.3657419">10.1145/3641519.3657419</a>'
  apa: 'Sellán, S., Ren, Y., Batty, C., &#38; Stein, O. (2024). Reach for the arcs:
    Reconstructing surfaces from SDFs via tangent points. In <i>SIGGRAPH ’24: Special
    Interest Group on Computer Graphics and Interactive Techniques Conference</i>.
    Denver, CO, United States: Association for Computing Machinery. <a href="https://doi.org/10.1145/3641519.3657419">https://doi.org/10.1145/3641519.3657419</a>'
  chicago: 'Sellán, Silvia, Yingying Ren, Christopher Batty, and Oded Stein. “Reach
    for the Arcs: Reconstructing Surfaces from SDFs via Tangent Points.” In <i>SIGGRAPH
    ’24: Special Interest Group on Computer Graphics and Interactive Techniques Conference</i>.
    Association for Computing Machinery, 2024. <a href="https://doi.org/10.1145/3641519.3657419">https://doi.org/10.1145/3641519.3657419</a>.'
  ieee: 'S. Sellán, Y. Ren, C. Batty, and O. Stein, “Reach for the arcs: Reconstructing
    surfaces from SDFs via tangent points,” in <i>SIGGRAPH ’24: Special Interest Group
    on Computer Graphics and Interactive Techniques Conference</i>, Denver, CO, United
    States, 2024.'
  ista: 'Sellán S, Ren Y, Batty C, Stein O. 2024. Reach for the arcs: Reconstructing
    surfaces from SDFs via tangent points. SIGGRAPH ’24: Special Interest Group on
    Computer Graphics and Interactive Techniques Conference. SIGGRAPH: Computer Graphics
    and Interactive Techniques Conference, 23.'
  mla: 'Sellán, Silvia, et al. “Reach for the Arcs: Reconstructing Surfaces from SDFs
    via Tangent Points.” <i>SIGGRAPH ’24: Special Interest Group on Computer Graphics
    and Interactive Techniques Conference</i>, 23, Association for Computing Machinery,
    2024, doi:<a href="https://doi.org/10.1145/3641519.3657419">10.1145/3641519.3657419</a>.'
  short: 'S. Sellán, Y. Ren, C. Batty, O. Stein, in:, SIGGRAPH ’24: Special Interest
    Group on Computer Graphics and Interactive Techniques Conference, Association
    for Computing Machinery, 2024.'
conference:
  end_date: 2024-08-01
  location: Denver, CO, United States
  name: 'SIGGRAPH: Computer Graphics and Interactive Techniques Conference'
  start_date: 2024-07-27
date_created: 2024-08-12T10:02:58Z
date_published: 2024-07-13T00:00:00Z
date_updated: 2024-08-12T10:11:19Z
day: '13'
doi: 10.1145/3641519.3657419
extern: '1'
language:
- iso: eng
month: '07'
oa_version: None
publication: 'SIGGRAPH ''24: Special Interest Group on Computer Graphics and Interactive
  Techniques Conference'
publication_identifier:
  isbn:
  - '9798400705250'
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Reach for the arcs: Reconstructing surfaces from SDFs via tangent points'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2024'
...
---
_id: '17424'
abstract:
- lang: eng
  text: "Surface-based inflatables are composed of two thin layers of nearly inextensible
    sheet material joined together along carefully selected fusing curves. During
    inflation, pressure forces separate the two sheets to maximize the enclosed volume.
    The fusing curves restrict this expansion, leading to a spatially varying in-plane
    contraction and hence metric frustration. The inflated structure settles into
    a 3D equilibrium that balances pressure forces with the internal elastic forces
    of the sheets.\r\nWe present a computational framework for analyzing and designing
    surface-based inflatable structures with arbitrary fusing patterns. Our approach
    employs numerical homogenization to characterize the behavior of parametric families
    of periodic inflatable patch geometries, which can then be combined to tessellate
    the sheet with smoothly varying patterns. We propose a novel parametrization of
    the underlying deformation space that allows accurate, efficient, and systematical
    analysis of the stretching and bending behavior of inflated patches with potentially
    open boundaries.\r\nWe apply our homogenization algorithm to create a database
    of geometrically diverse fusing patterns spanning a wide range of material properties
    and deformation characteristics. This database is employed in an inverse design
    algorithm that solves for fusing curves to best approximate a given input target
    surface. Local patches are selected and blended to form a global network of curves
    based on a geometric flattening algorithm. These fusing curves are then further
    optimized to minimize the distance of the deployed structure to target surface.
    We show that this approach offers greater flexibility to approximate given target
    geometries compared to previous work while significantly improving structural
    performance."
article_number: '87'
article_processing_charge: No
article_type: original
author:
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Julian
  full_name: Panetta, Julian
  last_name: Panetta
- first_name: Seiichi
  full_name: Suzuki, Seiichi
  last_name: Suzuki
- first_name: Uday
  full_name: Kusupati, Uday
  last_name: Kusupati
- first_name: Florin
  full_name: Isvoranu, Florin
  last_name: Isvoranu
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: Ren Y, Panetta J, Suzuki S, Kusupati U, Isvoranu F, Pauly M. Computational
    homogenization for inverse design of surface-based inflatables. <i>ACM Transactions
    on Graphics</i>. 2024;43(4). doi:<a href="https://doi.org/10.1145/3658125">10.1145/3658125</a>
  apa: Ren, Y., Panetta, J., Suzuki, S., Kusupati, U., Isvoranu, F., &#38; Pauly,
    M. (2024). Computational homogenization for inverse design of surface-based inflatables.
    <i>ACM Transactions on Graphics</i>. Association for Computing Machinery. <a href="https://doi.org/10.1145/3658125">https://doi.org/10.1145/3658125</a>
  chicago: Ren, Yingying, Julian Panetta, Seiichi Suzuki, Uday Kusupati, Florin Isvoranu,
    and Mark Pauly. “Computational Homogenization for Inverse Design of Surface-Based
    Inflatables.” <i>ACM Transactions on Graphics</i>. Association for Computing Machinery,
    2024. <a href="https://doi.org/10.1145/3658125">https://doi.org/10.1145/3658125</a>.
  ieee: Y. Ren, J. Panetta, S. Suzuki, U. Kusupati, F. Isvoranu, and M. Pauly, “Computational
    homogenization for inverse design of surface-based inflatables,” <i>ACM Transactions
    on Graphics</i>, vol. 43, no. 4. Association for Computing Machinery, 2024.
  ista: Ren Y, Panetta J, Suzuki S, Kusupati U, Isvoranu F, Pauly M. 2024. Computational
    homogenization for inverse design of surface-based inflatables. ACM Transactions
    on Graphics. 43(4), 87.
  mla: Ren, Yingying, et al. “Computational Homogenization for Inverse Design of Surface-Based
    Inflatables.” <i>ACM Transactions on Graphics</i>, vol. 43, no. 4, 87, Association
    for Computing Machinery, 2024, doi:<a href="https://doi.org/10.1145/3658125">10.1145/3658125</a>.
  short: Y. Ren, J. Panetta, S. Suzuki, U. Kusupati, F. Isvoranu, M. Pauly, ACM Transactions
    on Graphics 43 (2024).
date_created: 2024-08-12T10:03:38Z
date_published: 2024-07-19T00:00:00Z
date_updated: 2024-08-12T10:08:13Z
day: '19'
doi: 10.1145/3658125
extern: '1'
intvolume: '        43'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
publication: ACM Transactions on Graphics
publication_identifier:
  eissn:
  - 1557-7368
  issn:
  - 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: Computational homogenization for inverse design of surface-based inflatables
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 43
year: '2024'
...
---
_id: '17379'
abstract:
- lang: eng
  text: "We introduce a computational pipeline for simulating and designing C-shells,
    a new class of planar-to-spatial deployable linkage structures. A C-shell is composed
    of curved flexible beams connected at rotational joints that can be assembled
    in a stress-free planar configuration. When actuated, the elastic beams deform
    and the assembly deploys towards the target 3D shape.\r\nWe propose two alternative
    computational design approaches for C-shells: (i) Forward exploration simulates
    the deployed shape from a planar beam layout provided by the user. Once a satisfactory
    overall shape is found, a subsequent design optimization adapts the beam geometry
    to reduce the elastic energy of the linkage while preserving the target shape.
    (ii) Inverse design is facilitated by a new geometric flattening method that takes
    a design surface as input and computes an initial layout of piecewise straight
    linkage beams. Our design optimization algorithm then calculates the smooth curved
    beams to best reproduce the target shape at minimal elastic energy.\r\nWe find
    that C-shells offer a rich space for design and show several studies that highlight
    new shape topologies that cannot be achieved with existing deployable linkage
    structures."
article_number: '173'
article_processing_charge: No
article_type: original
author:
- first_name: Quentin
  full_name: Becker, Quentin
  last_name: Becker
- first_name: Seiichi
  full_name: Suzuki, Seiichi
  last_name: Suzuki
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Davide
  full_name: Pellis, Davide
  last_name: Pellis
- first_name: Julian
  full_name: Panetta, Julian
  last_name: Panetta
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: 'Becker Q, Suzuki S, Ren Y, Pellis D, Panetta J, Pauly M. C-shells: Deployable
    gridshells with curved beams. <i>ACM Transactions on Graphics</i>. 2023;42(6).
    doi:<a href="https://doi.org/10.1145/3618366">10.1145/3618366</a>'
  apa: 'Becker, Q., Suzuki, S., Ren, Y., Pellis, D., Panetta, J., &#38; Pauly, M.
    (2023). C-shells: Deployable gridshells with curved beams. <i>ACM Transactions
    on Graphics</i>. Association for Computing Machinery. <a href="https://doi.org/10.1145/3618366">https://doi.org/10.1145/3618366</a>'
  chicago: 'Becker, Quentin, Seiichi Suzuki, Yingying Ren, Davide Pellis, Julian Panetta,
    and Mark Pauly. “C-Shells: Deployable Gridshells with Curved Beams.” <i>ACM Transactions
    on Graphics</i>. Association for Computing Machinery, 2023. <a href="https://doi.org/10.1145/3618366">https://doi.org/10.1145/3618366</a>.'
  ieee: 'Q. Becker, S. Suzuki, Y. Ren, D. Pellis, J. Panetta, and M. Pauly, “C-shells:
    Deployable gridshells with curved beams,” <i>ACM Transactions on Graphics</i>,
    vol. 42, no. 6. Association for Computing Machinery, 2023.'
  ista: 'Becker Q, Suzuki S, Ren Y, Pellis D, Panetta J, Pauly M. 2023. C-shells:
    Deployable gridshells with curved beams. ACM Transactions on Graphics. 42(6),
    173.'
  mla: 'Becker, Quentin, et al. “C-Shells: Deployable Gridshells with Curved Beams.”
    <i>ACM Transactions on Graphics</i>, vol. 42, no. 6, 173, Association for Computing
    Machinery, 2023, doi:<a href="https://doi.org/10.1145/3618366">10.1145/3618366</a>.'
  short: Q. Becker, S. Suzuki, Y. Ren, D. Pellis, J. Panetta, M. Pauly, ACM Transactions
    on Graphics 42 (2023).
date_created: 2024-08-05T06:15:06Z
date_published: 2023-12-05T00:00:00Z
date_updated: 2024-08-12T09:56:32Z
day: '05'
doi: 10.1145/3618366
extern: '1'
intvolume: '        42'
issue: '6'
language:
- iso: eng
month: '12'
oa_version: None
publication: ACM Transactions on Graphics
publication_identifier:
  eissn:
  - 1557-7368
  issn:
  - 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'C-shells: Deployable gridshells with curved beams'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 42
year: '2023'
...
---
_id: '17380'
abstract:
- lang: eng
  text: Deployable gridshells are a class of planar-to-spatial structures that achievea
    3D curved geometry by inducing bending on a flat grid of elastic beams. However,
    theslender nature of these beams often conflicts with the structure’s load-bearing
    capacity.To address this issue, multiple layers are typically stacked to enhance
    out-of-planestiffness and prevent stability issues. The primary challenge then
    lies in deploying suchmulti-layered systems globally, as it requires significant
    shaping forces for actuation.This paper presents an alternative design approach
    that involves strategically connect-ing compact-to-volumetric gridshell components
    using weaving principles to shape athick segmented shell. This innovative approach
    allows for an incremental construc-tion process based entirely on deployable modules
    with volumetric configurations thatlocally provide the necessary structural depth
    for the entire system. To demonstrate thisprinciple, we present the realization
    of BamX, a research pavilion constructed usingdeployable cylindrical components
    made from raw bamboo slats. These componentsare interconnected at carefully optimized
    interlocking woven nodes, resulting in abending-active structural frame that is
    both strong and exceptionally lightweight. Todetermine the optimal topology and
    geometry of the pavilion, we employ an integrativecomputational approach that
    leverages advanced numerical optimization techniques.Our method incorporates a
    physics-based simulation of the bending and twisting be-havior of the bamboo ribbons.
    By finding the ideal locations for ribbon crossings, weensure that all external
    and internal forces are in global equilibrium while minimizingthe mechanical stress
    experienced by each ribbon. BamX exemplifies how a symbiosisof refined weaving
    craft and advanced computational modeling enables fascinatingnew opportunities
    for rethinking deployability in architecture.
alternative_title:
- De Gruyter STEM
article_processing_charge: Yes
author:
- first_name: Seiichi
  full_name: Suzuki, Seiichi
  last_name: Suzuki
- first_name: Alison
  full_name: Martin, Alison
  last_name: Martin
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Tzu-Ying
  full_name: Chen, Tzu-Ying
  last_name: Chen
- first_name: Stefana
  full_name: Parascho, Stefana
  last_name: Parascho
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: 'Suzuki S, Martin A, Ren Y, Chen T-Y, Parascho S, Pauly M. BamX: Rethinking
    Deployability in Architecture through Weaving. In: Dörfler K, Knippers J, Menges
    A, Parascho S, Pottmann H, Wortmann T, eds. <i>Advances in Architectural Geometry
    2023</i>. De Gruyter; 2023. doi:<a href="https://doi.org/10.1515/9783111162683-016">10.1515/9783111162683-016</a>'
  apa: 'Suzuki, S., Martin, A., Ren, Y., Chen, T.-Y., Parascho, S., &#38; Pauly, M.
    (2023). BamX: Rethinking Deployability in Architecture through Weaving. In K.
    Dörfler, J. Knippers, A. Menges, S. Parascho, H. Pottmann, &#38; T. Wortmann (Eds.),
    <i>Advances in Architectural Geometry 2023</i>. De Gruyter. <a href="https://doi.org/10.1515/9783111162683-016">https://doi.org/10.1515/9783111162683-016</a>'
  chicago: 'Suzuki, Seiichi, Alison Martin, Yingying Ren, Tzu-Ying Chen, Stefana Parascho,
    and Mark Pauly. “BamX: Rethinking Deployability in Architecture through Weaving.”
    In <i>Advances in Architectural Geometry 2023</i>, edited by Kathrin Dörfler,
    Jan Knippers, Achim Menges, Stefana Parascho, Helmut Pottmann, and Thomas Wortmann.
    De Gruyter, 2023. <a href="https://doi.org/10.1515/9783111162683-016">https://doi.org/10.1515/9783111162683-016</a>.'
  ieee: 'S. Suzuki, A. Martin, Y. Ren, T.-Y. Chen, S. Parascho, and M. Pauly, “BamX:
    Rethinking Deployability in Architecture through Weaving,” in <i>Advances in Architectural
    Geometry 2023</i>, K. Dörfler, J. Knippers, A. Menges, S. Parascho, H. Pottmann,
    and T. Wortmann, Eds. De Gruyter, 2023.'
  ista: 'Suzuki S, Martin A, Ren Y, Chen T-Y, Parascho S, Pauly M. 2023.BamX: Rethinking
    Deployability in Architecture through Weaving. In: Advances in Architectural Geometry
    2023. De Gruyter STEM, .'
  mla: 'Suzuki, Seiichi, et al. “BamX: Rethinking Deployability in Architecture through
    Weaving.” <i>Advances in Architectural Geometry 2023</i>, edited by Kathrin Dörfler
    et al., De Gruyter, 2023, doi:<a href="https://doi.org/10.1515/9783111162683-016">10.1515/9783111162683-016</a>.'
  short: S. Suzuki, A. Martin, Y. Ren, T.-Y. Chen, S. Parascho, M. Pauly, in:, K.
    Dörfler, J. Knippers, A. Menges, S. Parascho, H. Pottmann, T. Wortmann (Eds.),
    Advances in Architectural Geometry 2023, De Gruyter, 2023.
date_created: 2024-08-05T06:28:57Z
date_published: 2023-10-04T00:00:00Z
date_updated: 2024-08-12T09:54:02Z
day: '04'
ddc:
- '510'
doi: 10.1515/9783111162683-016
editor:
- first_name: Kathrin
  full_name: Dörfler, Kathrin
  last_name: Dörfler
- first_name: Jan
  full_name: Knippers, Jan
  last_name: Knippers
- first_name: Achim
  full_name: Menges, Achim
  last_name: Menges
- first_name: Stefana
  full_name: Parascho, Stefana
  last_name: Parascho
- first_name: Helmut
  full_name: Pottmann, Helmut
  last_name: Pottmann
- first_name: Thomas
  full_name: Wortmann, Thomas
  last_name: Wortmann
extern: '1'
file:
- access_level: open_access
  checksum: bf97dbf1794277f18711adef81b2e218
  content_type: application/pdf
  creator: dernst
  date_created: 2024-08-12T09:52:12Z
  date_updated: 2024-08-12T09:52:12Z
  file_id: '17421'
  file_name: 2023_ArchGeometry_Suzuki.pdf
  file_size: 775573
  relation: main_file
  success: 1
file_date_updated: 2024-08-12T09:52:12Z
has_accepted_license: '1'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '10'
oa: 1
oa_version: Published Version
publication: Advances in Architectural Geometry 2023
publication_identifier:
  eisbn:
  - '9783111162683'
  isbn:
  - '9783111160115'
publication_status: published
publisher: De Gruyter
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'BamX: Rethinking Deployability in Architecture through Weaving'
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...
---
_id: '17381'
abstract:
- lang: eng
  text: We present an algorithmic approach to discover, study, and design multistable
    elastic knots. Elastic knots are physical realizations of closed curves embedded
    in 3-space. When endowed with the material thickness and bending resistance of
    a physical wire, these knots settle into equilibrium states that balance the forces
    induced by elastic deformation and self-contacts of the wire. In general, elastic
    knots can have many distinct equilibrium states, i.e. they are multistable mechanical
    systems. We propose a computational pipeline that combines randomized spatial
    sampling and physics simulation to efficiently find stable equilibrium states
    of elastic knots. Leveraging results from knot theory, we run our pipeline on
    thousands of different topological knot types to create an extensive data set
    of multistable knots. By applying a series of filters to this data, we discover
    new transformable knots with interesting geometric and physical properties. A
    further analysis across knot types reveals geometric and topological patterns,
    yielding constructive principles that generalize beyond the currently tabulated
    knot types. We show how multistable elastic knots can be used to design novel
    deployable structures and engaging recreational puzzles. Several physical prototypes
    at different scales highlight these applications and validate our simulation.
article_number: '73'
article_processing_charge: No
article_type: original
author:
- first_name: Michele
  full_name: Vidulis, Michele
  last_name: Vidulis
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Julian
  full_name: Panetta, Julian
  last_name: Panetta
- first_name: Eitan
  full_name: Grinspun, Eitan
  last_name: Grinspun
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: Vidulis M, Ren Y, Panetta J, Grinspun E, Pauly M. Computational exploration
    of multistable elastic knots. <i>ACM Transactions on Graphics</i>. 2023;42(4).
    doi:<a href="https://doi.org/10.1145/3592399">10.1145/3592399</a>
  apa: Vidulis, M., Ren, Y., Panetta, J., Grinspun, E., &#38; Pauly, M. (2023). Computational
    exploration of multistable elastic knots. <i>ACM Transactions on Graphics</i>.
    Association for Computing Machinery. <a href="https://doi.org/10.1145/3592399">https://doi.org/10.1145/3592399</a>
  chicago: Vidulis, Michele, Yingying Ren, Julian Panetta, Eitan Grinspun, and Mark
    Pauly. “Computational Exploration of Multistable Elastic Knots.” <i>ACM Transactions
    on Graphics</i>. Association for Computing Machinery, 2023. <a href="https://doi.org/10.1145/3592399">https://doi.org/10.1145/3592399</a>.
  ieee: M. Vidulis, Y. Ren, J. Panetta, E. Grinspun, and M. Pauly, “Computational
    exploration of multistable elastic knots,” <i>ACM Transactions on Graphics</i>,
    vol. 42, no. 4. Association for Computing Machinery, 2023.
  ista: Vidulis M, Ren Y, Panetta J, Grinspun E, Pauly M. 2023. Computational exploration
    of multistable elastic knots. ACM Transactions on Graphics. 42(4), 73.
  mla: Vidulis, Michele, et al. “Computational Exploration of Multistable Elastic
    Knots.” <i>ACM Transactions on Graphics</i>, vol. 42, no. 4, 73, Association for
    Computing Machinery, 2023, doi:<a href="https://doi.org/10.1145/3592399">10.1145/3592399</a>.
  short: M. Vidulis, Y. Ren, J. Panetta, E. Grinspun, M. Pauly, ACM Transactions on
    Graphics 42 (2023).
date_created: 2024-08-05T06:29:22Z
date_published: 2023-08-01T00:00:00Z
date_updated: 2024-08-12T09:48:36Z
day: '01'
doi: 10.1145/3592399
extern: '1'
intvolume: '        42'
issue: '4'
language:
- iso: eng
month: '08'
oa_version: None
publication: ACM Transactions on Graphics
publication_identifier:
  eissn:
  - 1557-7368
  issn:
  - 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: Computational exploration of multistable elastic knots
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 42
year: '2023'
...
---
_id: '17382'
abstract:
- lang: eng
  text: 'Elastic surfaces that morph between multiple geometrical configurations are
    of significant engineering value, with applications ranging from the deployment
    of space-based photovoltaic arrays, the erection of temporary shelters, and the
    realization of flexible display systems, to understanding the encapsulation and
    release of viral RNAs. In general, ensuring that a shape with a planar rest configuration
    can deploy into a target three-dimensional (3D) shape is a nontrivial problem.
    Moreover, it is difficult to physically realize the local deformations necessary
    to achieve such global transformation. Here, we give a tutorial on applying conformal
    mapping to rationalize the geometrical deformation of several microstructure designs.
    A conformal map is a function that locally preserves angles and shapes but not
    lengths: some regions are scaled (enlarged or shrunk) more than others. To transform
    a planar surface to 3D, we implement uniform local scalings as mechanical deformations.
    Numerous natural and architected material systems exhibit such behavior, including
    kirigami, origami, hydrogel, linkage mechanisms, and fabric membranes. The design
    and fabrication of conformally transformable surfaces is a transdisciplinary challenge
    involving insights from advanced manufacturing, computational design, material
    science, and mechanics. By recognizing that many material systems exhibit isotropic
    deformation, we hope to inspire researchers to adopt conformal mapping in designing
    next-generation surface-based engineering systems.'
article_number: JAM-22-1358
article_processing_charge: No
article_type: original
author:
- first_name: Yue
  full_name: Wang, Yue
  last_name: Wang
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Tian
  full_name: Chen, Tian
  last_name: Chen
citation:
  ama: 'Wang Y, Ren Y, Chen T. From kirigami to hydrogels: A tutorial on designing
    conformally transformable surfaces. <i>Journal of Applied Mechanics</i>. 2023;90(4).
    doi:<a href="https://doi.org/10.1115/1.4056350">10.1115/1.4056350</a>'
  apa: 'Wang, Y., Ren, Y., &#38; Chen, T. (2023). From kirigami to hydrogels: A tutorial
    on designing conformally transformable surfaces. <i>Journal of Applied Mechanics</i>.
    American Society of Mechanical Engineers. <a href="https://doi.org/10.1115/1.4056350">https://doi.org/10.1115/1.4056350</a>'
  chicago: 'Wang, Yue, Yingying Ren, and Tian Chen. “From Kirigami to Hydrogels: A
    Tutorial on Designing Conformally Transformable Surfaces.” <i>Journal of Applied
    Mechanics</i>. American Society of Mechanical Engineers, 2023. <a href="https://doi.org/10.1115/1.4056350">https://doi.org/10.1115/1.4056350</a>.'
  ieee: 'Y. Wang, Y. Ren, and T. Chen, “From kirigami to hydrogels: A tutorial on
    designing conformally transformable surfaces,” <i>Journal of Applied Mechanics</i>,
    vol. 90, no. 4. American Society of Mechanical Engineers, 2023.'
  ista: 'Wang Y, Ren Y, Chen T. 2023. From kirigami to hydrogels: A tutorial on designing
    conformally transformable surfaces. Journal of Applied Mechanics. 90(4), JAM-22-1358.'
  mla: 'Wang, Yue, et al. “From Kirigami to Hydrogels: A Tutorial on Designing Conformally
    Transformable Surfaces.” <i>Journal of Applied Mechanics</i>, vol. 90, no. 4,
    JAM-22-1358, American Society of Mechanical Engineers, 2023, doi:<a href="https://doi.org/10.1115/1.4056350">10.1115/1.4056350</a>.'
  short: Y. Wang, Y. Ren, T. Chen, Journal of Applied Mechanics 90 (2023).
date_created: 2024-08-05T06:29:41Z
date_published: 2023-04-01T00:00:00Z
date_updated: 2024-08-12T09:45:05Z
day: '01'
doi: 10.1115/1.4056350
extern: '1'
intvolume: '        90'
issue: '4'
language:
- iso: eng
month: '04'
oa_version: None
publication: Journal of Applied Mechanics
publication_identifier:
  eissn:
  - 1528-9036
  issn:
  - 0021-8936
publication_status: published
publisher: American Society of Mechanical Engineers
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'From kirigami to hydrogels: A tutorial on designing conformally transformable
  surfaces'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 90
year: '2023'
...
---
_id: '17383'
abstract:
- lang: eng
  text: "We present a computational inverse design framework for a new class of volumetric
    deployable structures that have compact rest states and deploy into bending-active
    3D target surfaces. Umbrella meshes consist of elastic beams, rigid plates, and
    hinge joints that can be directly printed or assembled in a zero-energy fabrication
    state. During deployment, as the elastic beams of varying heights rotate from
    vertical to horizontal configurations, the entire structure transforms from a
    compact block into a target curved surface. Umbrella Meshes encode both intrinsic
    and extrinsic curvature of the target surface and in principle are free from the
    area expansion ratio bounds of past auxetic material systems.\r\nWe build a reduced
    physics-based simulation framework to accurately and efficiently model the complex
    interaction between the elastically deforming components. To determine the mesh
    topology and optimal shape parameters for approximating a given target surface,
    we propose an inverse design optimization algorithm initialized with conformal
    flattening. Our algorithm minimizes the structure's strain energy in its deployed
    state and optimizes actuation forces so that the final deployed structure is in
    stable equilibrium close to the desired surface with few or no external constraints.
    We validate our approach by fabricating a series of physical models at various
    scales using different manufacturing techniques."
article_processing_charge: No
article_type: original
author:
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Uday
  full_name: Kusupati, Uday
  last_name: Kusupati
- first_name: Julian
  full_name: Panetta, Julian
  last_name: Panetta
- first_name: Florin
  full_name: Isvoranu, Florin
  last_name: Isvoranu
- first_name: Davide
  full_name: Pellis, Davide
  last_name: Pellis
- first_name: Tian
  full_name: Chen, Tian
  last_name: Chen
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: 'Ren Y, Kusupati U, Panetta J, et al. Umbrella meshes: Elastic mechanisms for
    freeform shape deployment. <i>ACM Transactions on Graphics</i>. 2022;41(4):1-15.
    doi:<a href="https://doi.org/10.1145/3528223.3530089">10.1145/3528223.3530089</a>'
  apa: 'Ren, Y., Kusupati, U., Panetta, J., Isvoranu, F., Pellis, D., Chen, T., &#38;
    Pauly, M. (2022). Umbrella meshes: Elastic mechanisms for freeform shape deployment.
    <i>ACM Transactions on Graphics</i>. Association for Computing Machinery. <a href="https://doi.org/10.1145/3528223.3530089">https://doi.org/10.1145/3528223.3530089</a>'
  chicago: 'Ren, Yingying, Uday Kusupati, Julian Panetta, Florin Isvoranu, Davide
    Pellis, Tian Chen, and Mark Pauly. “Umbrella Meshes: Elastic Mechanisms for Freeform
    Shape Deployment.” <i>ACM Transactions on Graphics</i>. Association for Computing
    Machinery, 2022. <a href="https://doi.org/10.1145/3528223.3530089">https://doi.org/10.1145/3528223.3530089</a>.'
  ieee: 'Y. Ren <i>et al.</i>, “Umbrella meshes: Elastic mechanisms for freeform shape
    deployment,” <i>ACM Transactions on Graphics</i>, vol. 41, no. 4. Association
    for Computing Machinery, pp. 1–15, 2022.'
  ista: 'Ren Y, Kusupati U, Panetta J, Isvoranu F, Pellis D, Chen T, Pauly M. 2022.
    Umbrella meshes: Elastic mechanisms for freeform shape deployment. ACM Transactions
    on Graphics. 41(4), 1–15.'
  mla: 'Ren, Yingying, et al. “Umbrella Meshes: Elastic Mechanisms for Freeform Shape
    Deployment.” <i>ACM Transactions on Graphics</i>, vol. 41, no. 4, Association
    for Computing Machinery, 2022, pp. 1–15, doi:<a href="https://doi.org/10.1145/3528223.3530089">10.1145/3528223.3530089</a>.'
  short: Y. Ren, U. Kusupati, J. Panetta, F. Isvoranu, D. Pellis, T. Chen, M. Pauly,
    ACM Transactions on Graphics 41 (2022) 1–15.
date_created: 2024-08-05T06:30:07Z
date_published: 2022-07-22T00:00:00Z
date_updated: 2024-08-12T09:40:49Z
day: '22'
doi: 10.1145/3528223.3530089
extern: '1'
intvolume: '        41'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
page: 1-15
publication: ACM Transactions on Graphics
publication_identifier:
  eissn:
  - 1557-7368
  issn:
  - 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Umbrella meshes: Elastic mechanisms for freeform shape deployment'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 41
year: '2022'
...
---
_id: '17384'
abstract:
- lang: eng
  text: Basket weaving is a traditional craft for creating curved surfaces as an interwoven
    array of thin, flexible, and initially straight ribbons. The three-dimensional
    shape of a woven structure emerges through a complex interplay of the elastic
    bending behavior of the ribbons and the contact forces at their crossings. Curvature
    can be injected by carefully placing topological singularities in the otherwise
    regular weaving pattern. However, shape control through topology is highly non-trivial
    and inherently discrete, which severely limits the range of attainable woven geometries.
    Here, we demonstrate how to construct arbitrary smooth free-form surface geometries
    by weaving carefully optimized curved ribbons. We present an optimization-based
    approach to solving the inverse design problem for such woven structures. Our
    algorithm computes the ribbons' planar geometry such that their interwoven assembly
    closely approximates a given target design surface in equilibrium. We systematically
    validate our approach through a series of physical prototypes to show a broad
    range of new woven geometries that is not achievable by existing methods. We anticipate
    our computational approach to significantly enhance the capabilities for the design
    of new woven structures. Facilitated by modern digital fabrication technology,
    we see potential applications in material science, bio- and mechanical engineering,
    art, design, and architecture.
article_processing_charge: No
article_type: original
author:
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Julian
  full_name: Panetta, Julian
  last_name: Panetta
- first_name: Tian
  full_name: Chen, Tian
  last_name: Chen
- first_name: Florin
  full_name: Isvoranu, Florin
  last_name: Isvoranu
- first_name: Samuel
  full_name: Poincloux, Samuel
  last_name: Poincloux
- first_name: Christopher
  full_name: Brandt, Christopher
  last_name: Brandt
- first_name: Alison
  full_name: Martin, Alison
  last_name: Martin
- first_name: Mark
  full_name: Pauly, Mark
  last_name: Pauly
citation:
  ama: Ren Y, Panetta J, Chen T, et al. 3D weaving with curved ribbons. <i>ACM Transactions
    on Graphics</i>. 2021;40(4):1-15. doi:<a href="https://doi.org/10.1145/3450626.3459788">10.1145/3450626.3459788</a>
  apa: Ren, Y., Panetta, J., Chen, T., Isvoranu, F., Poincloux, S., Brandt, C., …
    Pauly, M. (2021). 3D weaving with curved ribbons. <i>ACM Transactions on Graphics</i>.
    Association for Computing Machinery. <a href="https://doi.org/10.1145/3450626.3459788">https://doi.org/10.1145/3450626.3459788</a>
  chicago: Ren, Yingying, Julian Panetta, Tian Chen, Florin Isvoranu, Samuel Poincloux,
    Christopher Brandt, Alison Martin, and Mark Pauly. “3D Weaving with Curved Ribbons.”
    <i>ACM Transactions on Graphics</i>. Association for Computing Machinery, 2021.
    <a href="https://doi.org/10.1145/3450626.3459788">https://doi.org/10.1145/3450626.3459788</a>.
  ieee: Y. Ren <i>et al.</i>, “3D weaving with curved ribbons,” <i>ACM Transactions
    on Graphics</i>, vol. 40, no. 4. Association for Computing Machinery, pp. 1–15,
    2021.
  ista: Ren Y, Panetta J, Chen T, Isvoranu F, Poincloux S, Brandt C, Martin A, Pauly
    M. 2021. 3D weaving with curved ribbons. ACM Transactions on Graphics. 40(4),
    1–15.
  mla: Ren, Yingying, et al. “3D Weaving with Curved Ribbons.” <i>ACM Transactions
    on Graphics</i>, vol. 40, no. 4, Association for Computing Machinery, 2021, pp.
    1–15, doi:<a href="https://doi.org/10.1145/3450626.3459788">10.1145/3450626.3459788</a>.
  short: Y. Ren, J. Panetta, T. Chen, F. Isvoranu, S. Poincloux, C. Brandt, A. Martin,
    M. Pauly, ACM Transactions on Graphics 40 (2021) 1–15.
date_created: 2024-08-05T06:30:27Z
date_published: 2021-08-01T00:00:00Z
date_updated: 2024-08-12T09:38:19Z
day: '01'
doi: 10.1145/3450626.3459788
extern: '1'
intvolume: '        40'
issue: '4'
language:
- iso: eng
month: '08'
oa_version: None
page: 1-15
publication: ACM Transactions on Graphics
publication_identifier:
  eissn:
  - 1557-7368
  issn:
  - 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
scopus_import: '1'
status: public
title: 3D weaving with curved ribbons
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 40
year: '2021'
...
---
_id: '17422'
abstract:
- lang: eng
  text: Inspired by motion patterns of some commercially available mobile robots,
    we investigate the power of robots that move forward in straight lines until colliding
    with an environment boundary, at which point they can rotate in place and move
    forward again; we visualize this as the robot “bouncing” off boundaries. We define
    bounce rules governing how the robot should reorient after reaching a boundary,
    such as reorienting relative to its heading prior to collision, or relative to
    the normal of the boundary. We then generate plans as sequences of rules, using
    the bounce visibility graph generated from a polygonal environment definition,
    while assuming we have unavoidable non-determinism in our actuation. Our planner
    can be queried to determine the feasibility of tasks such as reaching goal sets
    and patrolling (repeatedly visiting a sequence of goals). If the task is found
    feasible, the planner provides a sequence of non-deterministic interaction rules,
    which also provide information on how precisely the robot must execute the plan
    to succeed. We also show how to compute stable cyclic trajectories and use these
    to limit uncertainty in the robot’s position. </jats:p>
article_processing_charge: No
article_type: original
author:
- first_name: Alexandra Q
  full_name: Nilles, Alexandra Q
  last_name: Nilles
- first_name: Yingying
  full_name: Ren, Yingying
  id: 93d68d10-3540-11ef-a265-f748a50dba3d
  last_name: Ren
- first_name: Israel
  full_name: Becerra, Israel
  last_name: Becerra
- first_name: Steven M
  full_name: LaValle, Steven M
  last_name: LaValle
citation:
  ama: Nilles AQ, Ren Y, Becerra I, LaValle SM. A visibility-based approach to computing
    non-deterministic bouncing strategies. <i>The International Journal of Robotics
    Research</i>. 2021;40(10-11):1196-1211. doi:<a href="https://doi.org/10.1177/0278364921992788">10.1177/0278364921992788</a>
  apa: Nilles, A. Q., Ren, Y., Becerra, I., &#38; LaValle, S. M. (2021). A visibility-based
    approach to computing non-deterministic bouncing strategies. <i>The International
    Journal of Robotics Research</i>. SAGE Publications. <a href="https://doi.org/10.1177/0278364921992788">https://doi.org/10.1177/0278364921992788</a>
  chicago: Nilles, Alexandra Q, Yingying Ren, Israel Becerra, and Steven M LaValle.
    “A Visibility-Based Approach to Computing Non-Deterministic Bouncing Strategies.”
    <i>The International Journal of Robotics Research</i>. SAGE Publications, 2021.
    <a href="https://doi.org/10.1177/0278364921992788">https://doi.org/10.1177/0278364921992788</a>.
  ieee: A. Q. Nilles, Y. Ren, I. Becerra, and S. M. LaValle, “A visibility-based approach
    to computing non-deterministic bouncing strategies,” <i>The International Journal
    of Robotics Research</i>, vol. 40, no. 10–11. SAGE Publications, pp. 1196–1211,
    2021.
  ista: Nilles AQ, Ren Y, Becerra I, LaValle SM. 2021. A visibility-based approach
    to computing non-deterministic bouncing strategies. The International Journal
    of Robotics Research. 40(10–11), 1196–1211.
  mla: Nilles, Alexandra Q., et al. “A Visibility-Based Approach to Computing Non-Deterministic
    Bouncing Strategies.” <i>The International Journal of Robotics Research</i>, vol.
    40, no. 10–11, SAGE Publications, 2021, pp. 1196–211, doi:<a href="https://doi.org/10.1177/0278364921992788">10.1177/0278364921992788</a>.
  short: A.Q. Nilles, Y. Ren, I. Becerra, S.M. LaValle, The International Journal
    of Robotics Research 40 (2021) 1196–1211.
date_created: 2024-08-12T10:01:27Z
date_published: 2021-09-01T00:00:00Z
date_updated: 2024-08-12T10:15:14Z
day: '01'
doi: 10.1177/0278364921992788
extern: '1'
intvolume: '        40'
issue: 10-11
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1177/0278364921992788
month: '09'
oa: 1
oa_version: Published Version
page: 1196-1211
publication: The International Journal of Robotics Research
publication_identifier:
  eissn:
  - 1741-3176
  issn:
  - 0278-3649
publication_status: published
publisher: SAGE Publications
quality_controlled: '1'
scopus_import: '1'
status: public
title: A visibility-based approach to computing non-deterministic bouncing strategies
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 40
year: '2021'
...