Interface parameter analysis of laminates with non-ideal defects

doi:10.19936/j.cnki.2096-8000.20250828.009

Abstract

Abstract: Considering the influence of bridge fibers, a representative volume element(RVE) with damaged regions of vanishing thickness and a spring model with no thickness is established to characterize the ideal and non-ideal degree of cracks by two independent interface parameters(interface parameters can be used to simulate non-ideal degree in the sensitive interval) is developed to study for estimation of lanimates with transverse matrix cracks. For laminates with open and closed cracks, pending partition loads are applied in the statically indeterminate boundary. This paper not only consider three cases of the idela cracks, the smooth plane-surface open crack, the smooth plane-surface closed crack and the perfect meshing open crack, but also two cases of the non-ideal cracks, the open cracks and the closed cracks. The study not only verifies the symmetry of the flexibility element and the equality of the change rate of the shear flexibility element under closed cracks, but also shows that the non-ideal degree of cracks has a great influence on the effective coupling coefficient and the effective shear flexibility.

Key words: transverse matrix crack, ideal crack, non-ideal crack, variational analysis, interface parameters, stiffness reduction, composites

CLC Number:

TB332

XU Dong, HUANG Zhiqiang, CHEN Song, XIE Jingjing. Interface parameter analysis of laminates with non-ideal defects[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(8): 74-85.

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