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DTSTAMP:20240214T070242Z
LOCATION:Meeting Room C4.9+C4.10\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231212T154500
DTEND;TZID=Australia/Melbourne:20231212T160000
UID:siggraphasia_SIGGRAPH Asia 2023_sess161_papers_238@linklings.com
SUMMARY:Neural Metamaterial Networks for Nonlinear Material Design
DESCRIPTION:Technical Papers\n\nYue Li, Stelian Coros, and Bernhard Thomas
 zewski (ETH Zürich)\n\nNonlinear metamaterials with tailored mechanical pr
 operties have applications in engineering, medicine, robotics, and beyond.
  While modeling\ntheir macromechanical behavior is challenging in itself, 
 finding structure\nparameters that lead to an ideal approximation of high-
 level performance goals\nis a daunting task. In this work, we propose Neur
 al Metamaterial Networks\n(NMN)—smooth neural representations that encode 
 the nonlinear mechanics of entire metamaterial families. Given structure p
 arameters as input,\nNMN return continuously differentiable strain energy 
 density functions,\nthus guaranteeing conservative forces by construction.
  Though trained on\nsimulation data, NMN do not inherit the discontinuitie
 s resulting from topological changes in finite element meshes. They instea
 d provide a smooth\nmap from parameter to performance space that is fully 
 differentiable and\nthus well-suited for gradient-based optimization. On t
 his basis, we formulate\ninverse material design as a nonlinear programmin
 g problem that leverages\nneural networks for both objective functions and
  constraints. We use this\napproach to automatically design materials with
  desired strain-stress curves,\nprescribed directional stiffness, and Pois
 son ratio profiles. We furthermore\nconduct ablation studies on network no
 nlinearities and show the advantages\nof our approach compared to native-s
 cale optimization.\n\nRegistration Category: Full Access\n\nSession Chair:
  J. Andreas Bærentzen (Technical University of Denmark)
URL:https://asia.siggraph.org/2023/full-program?id=papers_238&sess=sess161
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