A trilinear cohesive model considering the effect of fiber bridging

doi:10.19936/j.cnki.2096-8000.20220828.031

Abstract

Abstract: In order to realize the simulation analysis of type Ⅰ layered expansion of carbon fiber laminate DCB specimens, the academia often uses the cohesive force model to establish a layered expansion model. However, the bilinear cohesive model embedded in the major commercial software can only realize the type Ⅰ layered expansion of carbon fiber DCB specimens without fiber bridging or with a small amount of fiber bridging. Existing studies have found that fiber bridging is a phenomenon that cannot be ignored in the delamination expansion of carbon fiber DCB specimens. Therefore, this paper develops a trilinear cohesion model that can describe the large-scale fiber bridging based on the bilinear cohesive model. The model is constructed based on two bilinear cohesion models, which are used to describe delamination initiation and fiber bridging, respectively. The validity and superiority of the model are verified by comparing with the experimental results and the numerical simulation results of the bilinear cohesion model.

Key words: DCB specimens, cohesive zone model, fiber bridging, composites

CLC Number:

TB332

KUANG Jia, JIANG Yaqin, WANG Zhou, YANG Ying, GAN Jin, WANG Xiaoli, ZENG Fei, TAN Licheng. A trilinear cohesive model considering the effect of fiber bridging[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(3): 27-33.

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