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Homogenization and thermoelastic analysis of heterogenous materials with regular and random microstructures

机译:具有规则和随机微观结构的异质材料的均质化和热弹性分析

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摘要

Homogenized material properties of dual-phase representative volume elements (RVEs) with regular and random microstructures are numerically estimated and their characteristics to the particle orientation and the microstructure morphology are investigated. The random morphology description functions (RMDF) based constructive approach is employed to create a variety of morphologically realistic micro-structures of dual-phase heterogeneous materials which are characterized by the volume fractions and the interconnected network of two phases by simply adjusting the level cut of a Gaussian random field. Furthermore, the microscopic thermomechanical responses of dual-phase heterogeneous composite beam are compared with those obtained using the homogenized material properties and investigated with respect to the microstructure morphology. In the regular microstructures, it is found that the homogenized material properties are significantly influenced by the particle orientation and the homogenized thermomechanical responses show the reasonable agreement with the microscopic responses. Meanwhile, in the random microstructures, it is observed that the variations of homogenized material properties and microscopic thermomechanical responses to the microstructure morphology decrease as the complexity of morphology increases.
机译:对具有规则和随机微观结构的双相代表体积元素(RVE)的均质材料特性进行了数值估计,并研究了它们对颗粒取向和微观结构形态的特性。基于随机形态学描述函数(RMDF)的构造方法用于创建双相异质材料的各种形貌逼真的微观结构,其特征在于,通过简单地调整Al2O3的能级截断,即可得到两相的体积分数和相互连接的网络。高斯随机场。此外,将双相非均质复合梁的微观热机械响应与使用均质材料特性获得的热力学响应进行了比较,并就微观结构形态进行了研究。在规则的微观结构中,发现均质的材料性能受到粒子取向的显着影响,并且均质的热机械响应与微观响应显示出合理的一致性。同时,在随机的微观结构中,观察到均质材料性能和微观热力学对微观结构形态的响应的变化随着形态复杂性的增加而减小。

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