Influence of fiber bridging on Mode I interlaminar fracture toughness of composites

被引：1

作者：

机构：

[1] School of Mechanics, Civil Engineering and Architecture, Northwest Polytechnical University

来源：

Wang, B. (b.wang@nwpu.edu.cn) | 1600年 / Chinese Society of Astronautics卷 / 34期

关键词：

Bridging fiber; Composite; DCB specimen; Fiber bridging model; Fracture toughness;

D O I：

10.7527/S1000-6893.2013.0141

中图分类号：

学科分类号：

摘要：

T700/9916 composite laminate specimens are tested according to ASTM D 5528 standards, and the fiber bridging effect on Model I interlaminar fracture toughness is investigated in double cantilever beam (DCB) tests. From experimental observation, a model with single (s zone) and double fiber bridging zone (d zone) is proposed. The number of bridging fibers on a point of the d zone is twice as large as that on a point of the s zone. From an interaction analysis between the bridging fibers and the beam, an exponentially decreasing function of single fiber bridging force versus angle is built. Based on the analysis above, a DCB model involving the bridging force function of the whole beam is established. The simulation results show a satisfactory agreement with test results. The present fiber bridging model reflects how bridging fibers act in the process of crack propagation.

引用

页码：817 / 825

页数：8

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