Modeling the Progressive Failure of Laminated Compositesстатья
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Дата последнего поиска статьи во внешних источниках: 6 апреля 2016 г.
Аннотация:An approach to the modeling of progressive failure that shows adequate results and can be used in practice to validate the strength of a composite structure is presented. The approach is based on the idea of instantaneous local failure in a layer in accordance with a failure criterion and further degradation of material stiffnesses. Calculation results for the progressive failure of a cross-ply specimen with a stress concentrator in the form of a circular hole are given. The pattern of layerwise failure growth is presented and compared with typical points of the stress–strain diagram. The efficiency of different failure criteria is studied for a composite specimen with known experimental data. The results of numerical simulation are compared with X-ray patterns of the specimen at different values of applied load. It is concluded that the method based on the 3D Hashin failure criterion gives the best qualitative and quantitative agreement with the experiment.