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Research on Deformation and Fracture Simulation of Objects and Rendering

Author: WuBo
Tutor: ZengLiang
School: National University of Defense Science and Technology
Course: Computer Science and Technology
Keywords: Meshless method Shape function Radial Basis Function Fracture Mechanics Deform Pre - breakup mode
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 21
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Abstract


The deformation of the object and the crushing simulation has always been a hot research field of computer graphics. It has a wide range of applications in the field of simulation training, games, entertainment, film and animation. With the rapid development of computer graphics hardware, object deformation crushing simulate simple simulation from the initial stage, the development of physics-based high-precision numerical simulation stage. The purpose of the current trends with real-time, the sense of realism and interactivity object deformation broken analog effect is increasingly favored by the user, but also effectively promoted the development of graphics hardware. In this paper, for the simulation of rigid body and plastic objects to carry out the research work. Study for the simulation of rigid body broken, broken based on the pre-breakup mode rigid body simulation technology; simulation of deformation and cracking of the plastic objects, research meshless method and finite element method numerical method based on the combination based The object, said methods and fracture mechanics theory, torque matrix singularity exists in traditional methods improved method based on radial basis point interpolation plastic grid method and GPU accelerated computing object deformation and rupture simulation. The main work and achieved major findings include: 1) broken for rigid body simulation computationally intensive, it is difficult to achieve real-time problem, and propose a simple and effective pre-crushing mode, it avoids the complex calculations, so rigid body crushing simulation of the real-time requirements. 2) for the traditional grid method the torque matrix in the singular problem, propose a portfolio constructed by Gaussian radial basis function and linear basis function meshless method shape functions, to overcome the traditional meshless method moment matrix singularity problems; grid method of calculation is based on the point in the object model, and thus fundamental to avoid complex finite element method grid operation and singular grid problems. 3) for the high complexity of representing an object changes to the traditional triangular facets or tetrahedral units, a dynamically selected from the existing triangular grid of sampling points, and using point-based method of representing an object, and thus more the flexibility that the process of change of the object model, better grid drawn effect; Finally, radial basis point interpolation meshless method, GPU-accelerated computing technology to achieve a plastic object deformation and rupture of the simulation process.

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