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1 引言一般树脂基复合材料板具有相当强烈的各向异性和非均匀性,受载后很容易发生基体裂纹群等损伤.同时,即使在常温下,这类材料也显示粘弹性.而且,损伤与粘弹性都是各向异性的.因此,复合材料力学响应的分析比均匀无损的粘弹性材料要复杂得多,困难得多.实际上,在复合材料的结构强度和尺寸稳定性设计中,它的时间相关性和存在损伤是两个不能回避的重要问题.为此,特别需要复合材料粘弹性损伤本构关系的知识.最近一个时期,复合材料的粘弹性本构关系已得到一定的研究.作者曾提出适用于复合材料分析的弹脆性损伤模型以及考虑损伤的粘弹性本构关系.在此基础
1 Introduction General resin-based composite plate has a very strong anisotropy and heterogeneity, after loading it is likely to occur such as matrix crack group damage at the same time, even at room temperature, these materials also showed viscoelasticity, and damage And viscoelasticity are anisotropic. Therefore, the analysis of mechanical response of composites is much more complicated and more difficult than the uniform and nondestructive viscoelastic material.In fact, in the structural strength and dimensional stability design of composites, Its time dependence and existing damage are two important problems that can not be avoided.Therefore, the knowledge of the viscoelastic damage constitutive relationship of composite materials is especially needed.In this period, the viscoelastic constitutive relation of composites has been studied The authors have proposed a brittleness damage model suitable for composite analysis and a viscoelastic constitutive relation considering damage.