Stable Orthotropic Materials

Li, Yijing; Barbic, Jernej

Stable Orthotropic Materials

Files

041-046.pdf (4.47 MB)

libarbicstableorthotropicmaterials-sca2014.mp4 (36.61 MB)

Date

2014

Authors

Li, Yijing
Barbic, Jernej

Publisher

The Eurographics Association

Abstract

Isotropic Finite Element Method (FEM) deformable object simulations are widely used in computer graphics. Several applications (wood, plants, muscles) require modeling the directional dependence of the material elastic properties in three orthogonal directions. We investigate orthotropic materials, a special class of anisotropic materials where the shear stresses are decoupled from normal stresses. Orthotropic materials generalize transversely isotropic materials, by exhibiting different stiffnesses in three orthogonal directions. Orthotropic materials are, however, parameterized by nine values that are difficult to tune in practice, as poorly adjusted settings easily lead to simulation instabilities. We present a user-friendly approach to setting these parameters that is guaranteed to be stable. Our approach is intuitive as it extends the familiar intuition known from isotropic materials. We demonstrate our technique by augmenting linear corotational FEM implementations with orthotropic materials.

        @inproceedings{:10.2312/sca.20141121
https::/diglib.eg.org/handle/10.2312/sca.20141121.041-046
,
booktitle = {Eurographics/ ACM SIGGRAPH Symposium on Computer Animation
},
editor = {Vladlen Koltun and Eftychios Sifakis
},
title = {{Stable Orthotropic Materials
}},
author = {Li, Yijing and 
Barbic, Jernej
},
year = {2014
},
publisher = {The Eurographics Association
},
ISSN = {1727-5288
},
ISBN = {978-3-905674-61-3
},
DOI = {/10.2312/sca.20141121
https://diglib.eg.org/handle/10.2312/sca.20141121.041-046
}
}