Geometric fracture modeling in Bolt

Hellrung, Jeffrey Lee; Selle, Andrew; Shek, Arthur; Sifakis, Eftychios; Teran, Joseph

doi:10.1145/1597990.1597997

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…In the field of computer graphics, fracture simulation is a significant research topic. Non-physical methods have been proposed to produce crack patterns [Bao et al 2007;Hellrung et al 2009;Müller et al 2013;Raghavachary 2002;Schvartzman and Otaduy 2014;Su et al 2009;Zheng and James 2010]. However, physics-based approaches are more accurate and preferred for fracture simulation.…”

Section: Related Workmentioning

confidence: 99%

Simulating Fractures With Bonded Discrete Element Method

Cao

et al. 2022

IEEE Trans. Visual. Comput. Graphics

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Along with motion and deformation, fracture is a fundamental behaviour for solid materials, playing a critical role in physically-based animation. Many simulation methods including both continuum and discrete approaches have been used by the graphics community to animate fractures for various materials. However, compared with motion and deformation, fracture remains a challenging task for simulation, because the material's geometry, topology and mechanical states all undergo continuous (and sometimes chaotic) changes as fragmentation develops. Recognizing the discontinuous nature of fragmentation, we propose a discrete approach, namely the Bonded Discrete Element Method (BDEM), for fracture simulation. The research of BDEM in engineering has been growing rapidly in recent years, while its potential in graphics has not been explored. We also introduce several novel changes to BDEM to make it more suitable for animation design. Compared with other fracture simulation methods, the BDEM has some attractive benefits, e.g. efficient handling of multiple fractures, simple formulation and implementation, and good scaling consistency. But it also has some critical weaknesses, e.g. high computational cost, which demand further research. A number of examples are presented to demonstrate the pros and cons, which are then highlighted in the conclusion and discussion.

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Section: Related Workmentioning

confidence: 99%

Simulating Fractures With Bonded Discrete Element Method

Cao

et al. 2022

IEEE Trans. Visual. Comput. Graphics

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“…This has also been used for nearly rigid materials where an instantaneous linear elastic response after collision events was used to determine stresses [Bao et al 2007;Zheng and James 2010;Su et al 2009]. Grain boundaries in this type of treatment can help to quickly create plausible fracture patterns [Bao et al 2007;Hellrung et al 2009;Zheng and James 2010]. Other interesting models for crack patterns were developed in [Iben and O'Brien 2006;Iben and O'Brien 2009;Neff and Fiume 1999].…”

Section: Related Workmentioning

confidence: 99%

A level set method for ductile fracture

Hegemann

Jiang

Schroeder

et al. 2013

Proceedings of the 12th ACM SIGGRAPH/Eurographics Symposium on Computer Animation

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We utilize the shape derivative of the classical Griffith's energy in a level set method for the simulation of dynamic ductile fracture. The level set is defined in the undeformed configuration of the object, and its evolution is designed to represent a transition from undamaged to failed material. No re-meshing is needed since the resulting topological changes are handled naturally by the level set method. We provide a new mechanism for the generation of fragments of material during the progression of the level set in the Griffith's energy minimization. Collisions between different material pieces are resolved with impulses derived from the material point method over a background Eulerian grid. This provides a stable means for colliding with embedded interfaces. Simulation of corotational elasticity is based on an implicit finite element discretization.

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“…Raghavachary used Voronoi diagram to define crack patterns on polygonal surfaces . Hellrung et al also applied Voronoi tessellation to decompose 3D meshes, where the distribution of fragments and the shape of fracture boundaries can be modulated by the user .…”

Section: Related Workmentioning

confidence: 99%

Practical simulation of hierarchical brittle fracture

Shin

Jun

2012

Computer Animation & Virtual

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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.

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Geometric fracture modeling in Bolt

Cited by 10 publications

References 1 publication

Simulating Fractures With Bonded Discrete Element Method

Simulating Fractures With Bonded Discrete Element Method

A level set method for ductile fracture

Practical simulation of hierarchical brittle fracture

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