Physical fracture mesomechanics of solids treated as nonlinear hierarchically organized systems

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• 作者：D. D. Moiseenko ; V. E. Panin
• 关键词：fracture criterion ; hierarchical system ; structure curvature ; torque ; nonlinearity
• 刊名：Mechanics of Solids
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：50
• 期：4
• 页码：400-411
• 全文大小：1,416 KB
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• 作者单位：D. D. Moiseenko (1)
  V. E. Panin (1)
  
  1. Institute of Strength Physics and Material Science, Siberian Branch of the Russian Academy of Sciences, Akademicheskii pr. 2/4, Tomsk, 634021, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mechanics
  Russian Library of Science
  
• 出版者：Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC
• ISSN：1934-7936

文摘

We show that one-level criteria for crack propagation in fracture mechanics should be supplemented by taking into account structure transformations in the local curvature regions of the crystal lattice in front of the crack tip. We develop a modified method of excitable cellular automata that takes into account the local torques in the crystal lattice with broken translational invariance and permits calculating the work of rotational deformation modes in crack propagation. Experimental data confirming the multilevel criteria of fracture mesomechanics are presented. Keywords fracture criterion hierarchical system structure curvature torque nonlinearity