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Deformation simulation of non-orthotropic materials
Wei Cao1; Xiaohua Ren1; Luan Lyu1; Enhua Wu1,2,3
2018-12-02
Conference Name16th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and Its Applications in Industry (VRCAI)
Source PublicationPROCEEDINGS OF THE 16TH ACM SIGGRAPH INTERNATIONAL CONFERENCE ON VIRTUAL-REALITY CONTINUUM AND ITS APPLICATIONS IN INDUSTRY (VRCAI 2018)
Conference DateDec. 2-3, 2018
Conference PlaceTokyo, Japan
Abstract

Physically based deformation simulation has been studied for many years in computer graphics. In order to simulate more complex materials and better meet the designer's requirements, the anisotropic approach was proposed in recent years. However, most of the existing approaches focus on orthotropic materials. In this paper, a general non-orthogonal constitutive model is presented to simulate the anisotropic deformation behavior for 3D soft objects. The model exhibits different deformation behaviors in different directions by constructing a non-orthogonal coordinate system with covariant and contravariant basis vectors. The constitutive relation between stress and strain is first defined in the non-orthogonal coordinate system, and then transformed into the standard Cartesian coordinate system to represent the global non-orthotropic materials. In addition, a time-varying method is introduced to track changes of the local coordinate system for each discrete element during deformation, which makes the simulation of non-orthotropic materials more stable. Finally, in order to present desirable features for objects with complex structure, the deformable objects are partitioned into several regions according to their skeletons with the combination of frame-field concept. A corotational linear Finite Element Method(CLFEM) is utilized to complete the simulation. Experiments are presented to demonstrate the efficiency of the non-orthogonal constitutive model.

KeywordDeformation Simulation Finite Element Method Non-orthotropic Materials Physically Based Animation
DOI10.1145/3284398.3284400
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science
WOS SubjectComputer Science, Interdisciplinary Applications ; Computer Science, Software Engineering ; Computer Science, Theory & Methods
WOS IDWOS:000455372200001
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Document TypeConference paper
专题DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Faculty of Science and Technology
Affiliation1.University of Macau, Macao, China
2.State Key Lab. of CS, ISCAS & Univ.of Chinese Academy of Sciences (CAS), Beijing, China
3.Zhuhai-UM S&T Research Institute, Zhuhai, China
First Author AffilicationUniversity of Macau
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Wei Cao,Xiaohua Ren,Luan Lyu,et al. Deformation simulation of non-orthotropic materials[C],2018.
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