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DTSTAMP:20250110T023312Z
LOCATION:Hall B7 (1)\, B Block\, Level 7
DTSTART;TZID=Asia/Tokyo:20241204T171600
DTEND;TZID=Asia/Tokyo:20241204T172800
UID:siggraphasia_SIGGRAPH Asia 2024_sess123_papers_239@linklings.com
SUMMARY:XPBI: Position-Based Dynamics with Smoothing Kernels Handles Conti
 nuum Inelasticity
DESCRIPTION:Technical Papers\n\nChang Yu and Xuan Li (University of Califo
 rnia Los Angeles), Lei Lan and Yin Yang (University of Utah), and Chenfanf
 u Jiang (University of California Los Angeles)\n\nPBD and its extension, X
 PBD, have been predominantly applied to compliant constrained elastodynami
 cs, with their potential in finite strain (visco-) elastoplasticity remain
 ing underexplored. XPBD is often perceived to stand in contrast to other m
 eshless methods, such as the MPM. MPM is based on discretizing the weak fo
 rm of governing partial differential equations within a continuum domain, 
 coupled with a hybrid Lagrangian-Eulerian method for tracking deformation 
 gradients. In contrast, XPBD formulates specific constraints, whether hard
  or compliant, to positional degrees of freedom. We revisit this perceptio
 n by investigating the potential of XPBD in handling inelastic materials t
 hat are described with classical continuum mechanics-based yield surfaces 
 and elastoplastic flow rules. Our inspiration is that a robust estimation 
 of the velocity gradient is a sufficiently useful key to effectively track
 ing deformation gradients in XPBD simulations. By further incorporating im
 plicit inelastic constitutive relationships, we introduce a plasticity in-
 the-loop updated Lagrangian augmentation to XPBD. This enhancement enables
  the simulation of elastoplastic, viscoplastic, and granular substances fo
 llowing their standard constitutive laws. We demonstrate the effectiveness
  of our method through high-resolution and real-time simulations of divers
 e materials such as snow, sand, and plasticine, and its integration with s
 tandard XPBD simulations of cloth and water.\n\nRegistration Category: Ful
 l Access, Full Access Supporter\n\nLanguage Format: English Language\n\nSe
 ssion Chair: Huamin Wang (Style3D Research)
URL:https://asia.siggraph.org/2024/program/?id=papers_239&sess=sess123
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