Nonlinear Material Design Using Principal Stretches ACM SIGGRAPH 2015

People

• Hongyi Xu
  University of Southern California
• Funshing Sin
  University of Southern California
  Blizzard Entertainment
• Yufeng Zhu
  University of Southern California
  University of British Columbia
• Jernej Barbič
  University of Southern California

Project material

• Paper (PDF, 7.5 Mb)
• Video (Quicktime MP4, 62 Mb)
• Supplementary Video (Quicktime MP4, 5.4 Mb)
• SIGGRAPH 2015 Presentation Slides (zipped PPTX, 84 Mb)

Citation

• Hongyi Xu, Funshing Sin, Yufeng Zhu, Jernej Barbič:
  Interactive Material Design Using Model Reduction, ACM Transactions on Graphics 34(4) (SIGGRAPH 2015), August 2015. BIBTEX

Abstract

The Finite Element Method is widely used for solid deformable object simulation in film, computer games, virtual reality and medicine. Previous applications of nonlinear solid elasticity employed materials from a few standard families such as linear corotational, nonlinear St.Venant-Kirchhoff, Neo-Hookean, Ogden or Mooney-Rivlin materials. However, the spaces of all nonlinear isotropic and anisotropic materials are infinite-dimensional and much broader than these standard materials. In this paper, we demonstrate how to intuitively explore the space of isotropic and anisotropic nonlinear materials, for design of animations in computer graphics and related fields. In order to do so, we first formulate the internal elastic forces and tangent stiffness matrices in the space of the principal stretches of the material. We then demonstrate how to design new isotropic materials by editing a single stress-strain curve, using a spline interface. Similarly, anisotropic (orthotropic) materials can be designed by editing three curves, one for each material direction. We demonstrate that modifying these curves using our proposed interface has an intuitive, visual, effect on the simulation. Our materials accelerate simulation design and enable visual effects that are difficult or impossible to achieve with standard nonlinear materials.

Comments, questions to Jernej Barbič.

Related projects

• Interactive Material Design Using Model Reduction
• Stable Orthotropic Materials
• Vega FEM

Funding

• NSF (CAREER-1055035, IIS-1422869)
• Sloan Foundation
• Intel Corporation (donation of two workstations)
• USC Annerberg Graduate Fellowship to Hongyi Xu
• USC James H. Zumberge Research and Innovation Fund

Disclaimer

Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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