Progressive damage analysis of open-hole laminate under tensile load

doi:10.19936/j.cnki.2096-8000.20230428.007

Abstract

Abstract: The progressive damage model of tensile open-hole laminates is established to study the failure modes of laminates, and analyze the effect of different sizes of open-hole on the ultimate load of open-hole laminates. By compiling VUMAT subroutine, Hashin failure criterion and material degradation model are added to progressive damage analysis. Firstly, the displacement-load curves of open-hole laminate with different mesh numbers are compared with the experiment result, and then the failure modes obtained from the simulation analysis are compared with the test results to verify the correctness of the progressive damage model and the selected failure criteria. Finally, the influence of different sizes of open hole on the tensile ultimate load of open-hole laminates is studied. The results show that the progressive damage model established in this paper can accurately predict the displacement-load curves and failure modes of laminates. The fiber tensile failure firstly occurs at the edge of the hole and expands along the 45° direction. With the increment of the open-hole diameter, the tensile ultimate load of open-hole laminates gradually decreases, and the decline speed begins to decrease linearly, and then the decline speed increases gradually.

Key words: laminate, circular hole, progressive damage model, 3D Hashin criterion, VUMAT subroutine, composites

CLC Number:

TB332

CAI Congyi, WU Haiyong. Progressive damage analysis of open-hole laminate under tensile load[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(4): 45-50.

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