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Efficient coarse graining in multiscale modeling of fracture

Budarapu, Pattabhi R. and Gracie, Robert and Yang, Shih-Wei and Zhuang, Xiaoying and Rabczuk, Timon Efficient coarse graining in multiscale modeling of fracture. Theoretical and Applied Fracture Mechanics , 69. 126 - 143. ISSN 0167-8442 (2014)

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Abstract

Abstract We propose a coarse-graining technique to reduce a given atomistic model into an equivalent coarse grained continuum model. The developed technique is tailored for problems involving complex crack patterns in 2D and 3D including crack branching and coalescence. Atoms on the crack surface are separated from the atoms not on the crack surface by employing the centro symmetry parameter. A rectangular grid is superimposed on the atomistic model. Atoms on the crack surface in each cell are used to estimate the equivalent coarse-scale crack surface of that particular cell. The crack path in the coarse model is produced by joining the approximated crack paths in each cell. The developed technique serves as a sound basis to study the crack propagation in multiscale methods for fracture.

Item Type: Article
Uncontrolled Keywords: Coarse graining; MD simulation; Multiscale method; Fracture; Atomistic model
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Research Area: Computer Science and Applications
Depositing User: Pattabhi Budarapu
Date Deposited: 27 Mar 2015 10:51
Last Modified: 27 Mar 2015 12:54
URI: http://eprints.imtlucca.it/id/eprint/2649

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