纤维桥连对复合材料Ⅰ型层间断裂韧性的影响

doi:10.7527/S1000-6893.2013.0141

Abstract

Abstract:

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.

Key words: composite, fracture toughness, bridging fiber, fiber bridging model, DCB specimen

CLC Number:

V214.8
TB332

ZHANG Long, WANG Bo, JIAO Guiqiong, HUANG Tao. Influence of Fiber Bridging on Mode I Interlaminar Fracture Toughness of Composites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, doi: 10.7527/S1000-6893.2013.0141.

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Influence of Fiber Bridging on Mode I Interlaminar Fracture Toughness of Composites

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