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학술지 Practical Simulation of Hierarchical Brittle Fracture
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저자
오승택, 신승협, 전혜령
발행일
201205
출처
Computer Animation and Virtual Worlds, v.23 no.3-4, pp.291-300
ISSN
1546-4261
출판사
John Wiley & Sons
DOI
https://dx.doi.org/10.1002/cav.1443
협약과제
11CT1500, 디지털 홀로그래픽 (DH) 콘텐츠 기반 기술 개발, 손욱호
초록
A novel practical method for brittle fracture simulation is presented. Our fracture model is represented by a tree structure, and all elementary fracture pieces are hierarchically connected. Each node in a fracture tree has a glue table to define connections and strengths among its child nodes. With our hierarchical fracture method, one can control the whole process of fracture formulation and simulation in a more direct way. Given an input object, a hierarchical fracture pattern is constructed by a series of recursive decompositions where the variation of fragment sizes can be intuitively controlled through a drawing interface. A noise pattern is applied on the interfaces of fragments for adding a natural look. A new simple and practical fracture criterion is also introduced, and we capture the difference of virtual and inherited velocities of fracture nodes to break the connection. Our fracture criterion is fast and robust because it does not involve any matrix solves or finite element analysis that is essential in the prior fracturing algorithms. We implement the proposed method on a fluid solver by extending a rigid body interaction unit, and as a result, we achieve that the fracture objects can interact with fluid and ordinary rigid bodies in a fully two-way manner. Copyright © 2012 John Wiley & Sons, Ltd.
키워드
fluid, fracture, rigid body
KSP 제안 키워드
Body Interaction, Brittle fracture, Fracture model, Fracture pattern, Fracture simulation, Practical Simulation, Practical method, Rigid bodies, Whole process, each node, finite element analysis(FEA)