The effect of material microstructure on the development of destruction in deforming bodies during compression
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Abstract
Predicting the location of crack initiation, the directions of local failure propagation, and estimating the ultimate load for composite materials remains one of the main challenges in fracture mechanics. Currently, with the rapid development of various types of composite materials, there is a large number of failure models and criteria that are valid for specific classes of materials and most fully describe their physical and mechanical properties, possible structural defects, operational requirements, and so on. Selecting effective methods for evaluating the load-bearing capacity of composite materials under extreme conditions remains a priority for further research in this field. When conducting such studies, it is very important to take into account the characteristics of real materials, which exhibit a certain degree of structural heterogeneity (defects and irregularities in the crystal lattice, microcracks, pores, microinclusions, scratches, marks, etc.). This paper gives preference to the failure criterion for composite materials based on the macrostress theory of M.Y. Leonov and K.M. Rusynko. The effectiveness of the macrostress theory has been demonstrated in the works of V.V. Panasyuk, L.T. Berezhnytskyi, S.Ya. Yarema, L.V. Ratych, M.G. Stashchuk, M.V. Delyavsky, and V.M. Sadivsky. This article clarifies and expands upon the advantages of the macrostress criterion compared to other failure criteria in deformed bodies. Models and examples of crack propagation during the compression of a body are presented.
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