Application of the MLS based enriched numerical manifold method in dynamic crack propagation - 文章详情页

作者：

Li, Wei (Li, Wei.) | Zheng, Hong (Zheng, Hong.) (学者：郑宏) | Chen, Yuanqiang (Chen, Yuanqiang.) | Lin, Shan (Lin, Shan.) | Sun, Yinghao (Sun, Yinghao.)

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摘要：

:Adopting　two　cover　systems　including　mathematical　and　physical　covers,numerical　manifold　method　can　resolve　the　problems　relating　to　cracks　naturally.　In　order　to　apply　the　moving　least　square　interpolation　based　numerical　manifold　method(MLS-NMM)　in　the　dynamic　crack　propagation,a　program　which　simulates　the　dynamic　crack　propagation　by　using　MLS-NMM　is　developed.　In　the　program,the　Bathe　implicit　time　integration　scheme　is　utilized　to　improve　the　accuracy　of　time　discretization,a　new　strategy　for　the　inheritance　of　degrees　of　freedom　is　proposed　to　deal　with　the　energy　inconsistency　in　dynamic　crack　propagation,and　the　criterion　of　fracture　mechanics　is　employed　to　predict　the　path　of　crack　propagation.　Through　the　solution　of　some　typical　problems　of　dynamic　crack　propagation,it　is　demonstrated　that　the　proposed　procedure　simulates　the　dynamic　crack　propagation　precisely.　©　2018,　Science　Press.　All　right　reserved.

关键词：

Computer simulation Crack propagation Cracks Degrees of freedom (mechanics) Dynamics Interpolation Least squares approximations Numerical methods Numerical models

作者机构：

[ 1 ] [Li, Wei]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China
[ 2 ] [Li, Wei]University of Chinese Academy of Sciences, Beijing; 100049, China
[ 3 ] [Zheng, Hong]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China
[ 4 ] [Zheng, Hong]University of Chinese Academy of Sciences, Beijing; 100049, China
[ 5 ] [Zheng, Hong]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Chen, Yuanqiang]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China
[ 7 ] [Chen, Yuanqiang]University of Chinese Academy of Sciences, Beijing; 100049, China
[ 8 ] [Lin, Shan]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China
[ 9 ] [Lin, Shan]University of Chinese Academy of Sciences, Beijing; 100049, China
[ 10 ] [Sun, Yinghao]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan; Hubei; 430071, China
[ 11 ] [Sun, Yinghao]University of Chinese Academy of Sciences, Beijing; 100049, China

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