Homogenized thermal properties of 3D composites with full uncertainty in the microstructure

Homogenized thermal properties of 3D composites with full uncertainty in the microstructure
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微观结构完全不确定的 3D 复合材料的均匀热性能

DOI:
10.12989/sem.2016.57.2.369
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发表时间:
2016-01
影响因子:
2.2
通讯作者:
马娟
马娟
中科院分区:
工程技术4区
文献类型:
--
作者:
马娟

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在这项工作中,通过将等效包含法与随机因子法(RFM)相结合,对具有单向纤维的三维复合材料的有效热性能进行随机均匀化分析。完全考虑了微观结构形态和组成材料性能的随机性以及这些随机参数之间的相关性,然后寻求随机有效热性能(如热膨胀系数)及其相关性。对 RFM 和蒙特卡罗方法 (MCM) 的结果进行了比较。通过两种方法同时揭示了微观结构参数的随机性和相关性对随机均质化结果的影响,并得到了一些重要的结论。
In this work, random homogenization analysis for the effective thermal properties of a three-dimensional composite material with unidirectional fibers is presented by combining the equivalent inclusion method with Random Factor Method (RFM). The randomness of the micro-structural morphology and constituent material properties as well as the correlation among these random parameters are completely accounted for, and stochastic effective thermal properties as thermal expansion coefficients as well as their correlation are then sought. Results from the RFM and the Monte-Carlo Method (MCM) are compared. The impact of randomness and correlation of the micro-structural parameters on the random homogenized results is revealed by two methods simultaneously, and some important conclusions are obtained.
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