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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：复合材料学报

期号：1

页面范围：158-163

ISSN号：1000-3851

摘要：The finite element processes for predicting the effective viscoelastic relaxation modulus, the effective thermal stress relaxation modulus and the effective time-dependent thermal expansion coefficient are given. The thermal viscoelastic constitutive equations including temperature change, the effective thermal stress relaxation laws and the time-dependent character of the thermal expansion coefficients of unidirectional fiber reinforced composite materials are studied. The deformation analysis of an one-dimensional structure of unidirectional fiber reinforced composites shows that the thermal strain depends on time intensively. The numerical results illustrate that the time-dependency of the effective thermal stress relaxation modulus of unidirectional fiber reinforced composites is slight; its impact modulus is only 0.4% more than its asymptotic modulus.

备注：新增回溯数据