Animation of crack propagation by means of an extended multi-body solver for the material point method. (December 2017)

• Record Type: Journal Article
• Authors: Wretborn, Joel; Armiento, Rickard; Museth, Ken
• Is Part Of: Computers & graphics. Volume 69(2017)
• Page Start: 131
• Page End: 139
• Publication Date: 2017-12
• Subjects: Material point method -- Cracks -- Contact; Computer graphics -- Periodicals; 006.6
• DOI: 10.1016/j.cag.2017.10.005
• Languages: English
• ISSNs: 0097-8493

Abstract

Highlights: New N-body collision algorithm for the material point method framework. Dynamic crack propagation algorithm using multi-body solver and particle constraints. Example contact and tearing scenarios are provided as results. Graphical abstract: Abstract: We propose a multi-body solver that extends the Material Point Method (MPM) to simulate cracks in computer animation. We define cracks as the intersection between pieces of bodies created by a pre-fracture process and held together by massless particle constraints (glue particles). These pieces are simulated using a MPM multi-body solver extended by us to efficiently handle N -body collisions. Benefits of the present work include (1) low computational overhead compared to a normal MPM algorithm; (2) good scaling in three dimensions due to our use of sparse grids for background computations; (3) allowing for an easy and controllable setup phase to simulate a desired material failure mode, which is especially useful for computer animation.