Abstract
Nonlinear finite element method is one of major methods for realtime simulation of elastic solids, but it produces unnatural behavior under extreme deformation. In nonlinear finite element simulation, the equation of motion must be discretized along time and a nonlinear function in the equation must be linearized based on Taylor expansion. This paper presents a method to improve the behavior of the simulated models by appropriate modifications of the discretization method and the center of Taylor expansion. The presented method is validated through experiments in which an elastic model is crushed and extremely expanded.
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