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定量分析了粒子增强体复合材料的粘弹性力学性能。首先,依据复合材料的细观力学理论与Laplace变换理论,在Tan提出的粘弹性模型基础上,发展了一种改进的粒子增强体复合材料的三维线粘弹性模型,克服了Tan的模型只能刻画界面脱湿的缺点;其次,采用非线性有限元方法,实现了粒子增强体复合材料在常应变率下粘弹性本构关系的数值模拟。结果表明,该模型与程序可用于定量化分析多种情况下粘弹性问题的应力-应变关系,如不同粒径、温度、常应变率及粒子体积分数等参数,并得出粒径大的固体颗粒与粒子体积分数高的复合材料都容易发生界面脱湿。
The viscoelastic properties of the particle reinforced composites were quantitatively analyzed. First of all, based on the theory of micromechanics and Laplace transform of composite materials, an improved three-dimensional linear viscoelastic model of particle reinforced composites was developed based on the viscoelastic model proposed by Tan. And the dewatering of the interface is described. Secondly, the nonlinear finite element method is used to simulate the viscoelastic constitutive relationship of the particle reinforced composites under normal strain rate. The results show that the model and program can be used to quantitatively analyze the stress-strain relationship of viscoelasticity under various conditions, such as different particle size, temperature, normal strain rate and particle volume fraction, Particle and particle volume fraction of the composite materials are prone to interface dehumidification.