Theoretical analysis and experimental investigation of the occurrence of fiber bridging in unidirectional laminates under Mode I loading
Theoretical analysis and experimental investigation of the occurrence of fiber bridging in unidirectional laminates under Mode I loading
复制标题
Ⅰ型载荷下单向层合板纤维桥联的理论分析和实验研究
DOI：
10.1016/j.compstruct.2020.113383
复制
发表时间：
2021-02-01
影响因子：
6.3
通讯作者：
Chen, Puhui
中科院分区：
文献类型：
--
作者：
Liu, Weiling;Chen, Puhui
Composite laminates have been extensively used in the aerospace and automotive industries due to their excellent stiffness and strength. Fiber bridging is a unique phenomenon of layered composite materials that increases the fracture toughness of the composites several times. This characteristic enables fiber bridging to be an important crack shielding mechanism during delamination and arouses wide attention from researchers. Most research is focused on studying the mechanism of fiber bridging and establishing the traction separation relation of bridging for delamination simulation, while for a given composite material, a simple and direct approach to identify whether fiber bridging could occur during the delamination is still lacking. This paper provides an efficient method to deal with this problem. It is based on the weak fiber/matrix interface assumption so that fibers can be pulled out easier to bridge the cracked faces. Eleven groups of DCB tests, both with and without fiber bridging, are used to validate the feasibility of this approach. Besides, this approach can also be extended to Mode II or mixed Mode I/II test.
