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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