GVU Technical Report Number:
GIT-GVU-00-20
Title:
THESIS: Graphical Modeling and Animation of Fracture
Authors:
James F. O'Brien
Abstract:
This thesis addresses the problem of graphically modeling and
animating the realistic behavior of materials that can undergo
fracture due to deformation-induced stress. Using an approach
based on linear elastic fracture mechanics and non-linear finite
element analysis, three-dimensional volumes are modeled using a
mesh of tetrahedral elements. By analyzing the stresses created
as the mesh deforms, the simulation determines where cracks
should begin and in what directions they should propagate. The
system accommodates arbitrary propagation directions by dynamically
retesselating the mesh. Because cracks are not limited to element
boundaries, the models can form irregularly shaped features as
they shatter. This technique overcomes limitations of previous
methods that made it difficult to represent the shape of the
fracture's surface. Results are presented to demonstrate that
this method can be used to animate complex, real-world situations
in a compelling, realistic fashion.
Keywords:
Animation, fracture
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