Discrete element modeling of the process zone shape in mode I fracture at peak load and in post-peak regime
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- 作者：Ali Fakhimi ; hamed@nmt.edu" class="auth_mail" title="E-mail the corresponding author ; Fang Wan
- 关键词：Shape of fracture process zone ; Discrete element modeling ; Size effect ; Post-peak deformation ; Servo-controlled loading
- 刊名：International Journal of Rock Mechanics and Mining Sciences
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：85
- 期：Complete
- 页码：119-128
- 全文大小：2160 K
文摘
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Discrete element method is used to study the fracture process zone.
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A servo-controlled loading system is defined to capture the post-peak rock behavior.
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Two methods to define the process zone domain are introduced.
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Material ductility and specimen size do not affect the shape of the process zone if the macro-crack extension at the peak load is considered.
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Preferential orientation of damaged contacts in the process zone suggests development of an anisotropic region around the macro-crack.