Abstract: Based on the five-parameter model of the viscoclasticity of the matrix, the vis-coelastic constitutive equations of the damaged fiber-reinforced plastics are derived in this paper with the introduction of the interfacial damage variable. The effects of matrix viscoelasticity, fiber volume fraction and the interfacial bonding condition on the viscoelastic behavior of the composite are included in the above constitutive equations, by which the theoretical prediction to the creep behavior of the composite is presented. Comparison between the calculation values of the formula and the test results gives a good agreement.

Key words: fiber-reinforced plastics, viscoelasticity, constitutive equation, interfa-cial damage, creep

摘要： 文章在对基体建立粘弹性5参数模型基础上,引入反映界面粘结性能的相间损伤变量,导得纤维增强复合材料的损伤粘弹性本构方程。方程反映了基体粘弹性、纤维含量及界面性能对复合材料粘弹性行为的影响。据此对蠕变所作的理论预测与试验结果比较吻合良好。

关键词: 纤维增强复合材料, 粘弹性, 本构方程, 相间损伤, 蠕变