Author Archives: christopherbatty

Decomposed Optimization Time Integrator for Large-Step Elastodynamics

Minchen Li, Ming Gao, Timothy Langlois, Chenfanfu Jiang, Danny M. Kaufman Simulation methods are rapidly advancing the accuracy, consistency and controllability of elastodynamic modeling and animation. Critical to these advances, we require efficient time step solvers that reliably solve all … Continue reading

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Mixing Sauces: A Viscosity Blending Model for Shear Thinning Fluids

Kentaro Nagasawa, Takayuki Suzuki, Ryohei Seto, Masato Okada, Yonghao Yue The materials around us usually exist as mixtures of constituents, each constituent with possibly a different elasto-viscoplastic property. How can we describe the material property of such a mixture is … Continue reading

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On the Accurate Large-scale Simulation of Ferrofluids

L. Huang, T. Hädrich, D. L. Michels We present an approach to the accurate and efficient large-scale simulation of the complex dynamics of ferrofluids based on physical principles. Ferrofluids are liquids containing magnetic particles that react to an external magnetic … Continue reading

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Silly Rubber: An Implicit Material Point Method for Simulating Non-equilibrated Viscoelastic and Elastoplastic Solids

Yu Fang, Minchen Li, Ming Gao, Chenfanfu Jiang Simulating viscoelastic polymers and polymeric fluids requires a robust andaccurate capture of elasticity and viscosity. The computation is known to become very challenging under large deformations and high viscosity. Drawing inspirations from … Continue reading

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On Bubble Rings and Ink Chandeliers

Marcel Padilla, Albert Chern, Felix Knöppel, Ulrich Pinkall, Peter Schröder We introduce variable thickness, viscous vortex filaments. These can model such varied phenomena as underwater bubble rings or the intricate “chandeliers” formed by ink dropping into fluid. Treating the evolution … Continue reading

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CD-MPM: Continuum Damage Material Point Methods for Dynamic Fracture Animation

Joshuah Wolper, Yu Fang, Minchen Li, Jiecong Lu, Ming Gao, Chenfanfu Jiang We present two new approaches for animating dynamic fracture involving large elastoplastic deformation. In contrast to traditional mesh-based tech- niques, where sharp discontinuity is introduced to split the … Continue reading

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Anisotropic elasticity for inversion-safety and element rehabilitation

Ted Kim, Fernando de Goes, Hayley Iben We present an analysis of anisotropic hyperelasticity, specifically transverse isotropy, that obtains closed-form expressions for the eigendecompositions of many common energies. We then use these to build fast and concise Newton implementations. We … Continue reading

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SIGGRAPH 2019

Anisotropic Elasticity for Inversion-Safety and Element Rehabilitation CD-MPM: Continuum Damage Material Point Methods for Dynamic Fracture Animation Silly Rubber: An Implicit Material Point Method for Simulating Non-equilibrated Viscoelastic and Elastoplastic Solids Decomposed Optimization Time Integrator for Large-Step Elastodynamics Efficient and … Continue reading

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A Geometrically Consistent Viscous Fluid Solver with Two-Way Fluid-Solid Coupling

Tetsuya Takahashi, Ming C. Lin. We present a grid-based fluid solver for simulating viscous materials and their interactions with solid objects. Our method formulates the implicit viscosity integration as a minimization problem with consistently estimated volume fractions to account for … Continue reading

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Efficient block pivoting for multibody simulations with contact

Andreas Enzenhoefer, Nicolas Lefebvre, Sheldon Andrews Simulating stiff physical systems is a requirement for numerous computer graphics applications, such as VR training for heavy equipment operation. However, iterative linear solvers often perform poorly in such cases, and direct methods involving … Continue reading

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