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Date of Publication:2016-01-01

Journal:复合材料学报

Affiliation of Author(s):运载工程与力学学部

Issue:3

Page Number:525-534

ISSN No.:1000-3851

Abstract:A micromechanical numerical model was established for composites, including the interface and taking into account random fiber distribution, to simulate the thermal residual stress of glass fiber/epoxy composites during the curing process. By comparison with the calculation results of model with periodic fiber distribution, it is found that the fiber array form has great influence on the thermal residual stress of composites, with the maximum thermal residual stress of random fiber distribution much greater than that of periodic fiber distribution. The damage and failure process of composites subjected to transverse tension and compression load including thermal residual stress were also investigated. The results indicate that the existence of thermal residual stress significantly affects the damage initiation location and progressing path of composites, weakening the transverse tensile and compressive strength of the composites. Under transverse tension load, after including thermal residual stress, the strength of the composite decreases somewhat, and the fracture strain decreases greatly; under transverse compression load, after including thermal residual stress, the strength of the composite decreases slightly, but the failure strain almost remains unchanged. Due to the effect of thermal residual stress, the transverse tensile and compressive strength of the composites decrease by 10.5% and 5.2%, respectively. © 2016, BUAA Culture Media Group Ltd. All right reserved.

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