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BRITTLE FRAGMENTATION OF AN EXPANDING RING BY MOLECULAR DYNAMICS

GUOWU REN

Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, P. R. China

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TIEGANG TANG

Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, P. R. China

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ZHAOLIANG GUO

Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, P. R. China

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YUANSHUAI YANG

Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, P. R. China

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, and

QINGZHONG LI

Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, P. R. China

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https://doi.org/10.1142/S2047684113500103Cited by:0 (Source: Crossref)

Abstract

In this paper, the brittle fragmentation of an expanding ring is numerically studied by a simple atomistic model. We investigate the statistical distribution of fragment spanned over a wide range of strain rates when damage related to broken bond reaches a steady state. It is shown that at low strain rate limited number of heavy fragments can be generated because of anisotropic behavior while for high strain rate fragment can be well fitted with Weibull distribution. The physical mechanism of fragmentation process reveals that damage accompanying with numerous microcracks is found to initiate in the inner regime of the expanding ring. Furthermore, we discuss the effect of random defect on the fragmentation process.

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