Integrating mesh and meshfree methods for physics-based fracture and debris cloud simulation

Authors:
Nan Zhang;Xiangmin Zhou;Desong Sha;Xiaoru Yuan;Kumar Tamma;Baoquan Chen
Affiliations:
University of Minnesota at Twin Cities;University of Minnesota at Twin Cities;University of Minnesota at Twin Cities;University of Minnesota at Twin Cities;University of Minnesota at Twin Cities;University of Minnesota at Twin Cities
Venue:
SPBG'06 Proceedings of the 3rd Eurographics / IEEE VGTC conference on Point-Based Graphics
Year:
2006

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Abstract

We present a hybrid framework for physics-based simulation of fracture and debris clouds. Previous methods mainly consider bulk fractures. However, in many situations, small fractured pieces and debris are visually important. Our framework takes a hybrid approach that integrates both tetrahedron-based finite element and particlebased meshfree methods. The simulation starts with a tetrahedral mesh. When the damage of elements reaches a damage failure threshold, the associated nodes are converted into mass-based particles. Molecular dynamics is used to model particle motion and interaction with other particles and the remaining elements. In rendering, we propose an algorithm of dynamically extracting a polygonal boundary surface for the damaged elements and particles. Our framework is simple, accurate, and efficient. It avoids the remeshing and stability problems of pure mesh-based techniques and pure meshfree methods and offers high visual realism.