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arXiv 1609.08191cond-mat.mtrl-sci
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编织陶瓷基复合材料高温热机械行为的模拟

Modeling the thermo-mechanical behavior of a woven ceramic matrix composite at high temperatures

Koffi Enakoutsa, Youssef Hammi, John E. Crawford, Joseph Abraham, Joe Magallanes

摘要:

本文旨在扩展Ladeveze开发的模型,以捕获热膨胀和耦合的热机械现象,例如在高温和极端温度下遇到的现象。在新模型中,状态方程中加入了线性热膨胀系数,以考虑热力耦合效应。通过假设由于残余应变效应而产生的内部热来引入机械热效应。将陶瓷基复合材料模型的热力耦合本构关系作为用户自定义材料软件纳入Abaqus有限元程序中。Letombes提出的方法的扩展,以校准陶瓷基复合材料损伤模型参数的基础上,由赛峰集团开发的编织碳化硅碳化硅材料。基于狗骨和开孔试样测试的可行性测试(拉伸-压缩、拉伸-拉伸循环、简单拉伸测试)证明了碳化硅材料中的非线性以及耦合热-机械行为的良好捕获。

英文摘要:

This paper aimed at extending a model developed by Ladeveze to capture thermal expansion and coupled thermo-mechanical phenomena, as such as those encountered at elevated and extreme temperatures. In the new model a linear thermal expansion coefficient is added to equation of state to account for the thermal to mechanical coupling effects. The mechanical to thermal effects are introduced by assuming an internal heat generation due to residual strain effects. The constitutive relations of the coupled thermo-mechanical behaviors of ceramic matrix composite material model were incorporated into Abaqus finite element code as user defined material software. An extension of the methodology presented by Letombes to calibrate the ceramic matrix composite damage model parameters based on a woven silicon-carbide silicon-carbide material developed by Safran Group. Feasibility tests (tension-compression, tension-tension cyclic, simple tension tests) based on a dog bone and open hole specimen tests demonstrated a good capturing of nonlinear as well as coupled thermos-mechanical behaviors in the silicon-carbide silicon-carbide material.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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