A mesomechanical model for predicting the degradation in stiffness of FRP composites subjected to combined thermal and mechanical loading

Shengbo Shi*, Liangxian Gu, Jun Liang, Guodong Fang, Chunlin Gong, Cunxi Dai

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

21 引用 (Scopus)

摘要

The mechanical properties of Fiber Reinforced Polymer (FRP) composites decrease with increasing thermal exposure temperature and time. A mesomechanical model was presented to predict the degraded behavior of FRP composites supporting a static compressive loading under high temperatures. The thermal softening, thermal decomposition of the matrix material and phase transition of the reinforced fibers were considered in the developed model, which adversely affect the stiffness properties of the composite material. Also, in order to evaluate the effect of high internal pressure on stiffness property, the bulk modulus was applied in the formulation of the mathematical model. High temperature compression experiments were conducted to measure the temperature-dependent elastic modulus. The accuracy of the model was further assessed by comparing simulated and experimental modulus. The reduction in stiffness properties of FRP composites at high temperatures can be roughly divided into three stages by analyzing the predicted temperature-modulus curve.

源语言英语
页(从-至)1079-1085
页数7
期刊Materials and Design
89
DOI
出版状态已出版 - 5 1月 2016
已对外发布

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