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首页> 外文期刊>Aerospace science and technology >Fully coupled thermo-mechanical analysis of bi-directional FGM beams using NURBS isogeometric finite element approach
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Fully coupled thermo-mechanical analysis of bi-directional FGM beams using NURBS isogeometric finite element approach

机译：使用NURBS等几何有限元方法对双向FGM梁进行全耦合热力学分析

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摘要

The fully coupled thermo-mechanical behavior of bi-directional functionally graded material (FGM) beam structures is studied using a computationally low cost isogeometric finite element model. In the proposed analysis, the temperature is considered as a primary variable. The kinematical equations of the bi-directional FGM beam are described by a refined high order global-local theory. A combination of polynomial and exponential expressions is used to introduce the in-plane displacement field. This representation of the in-plane displacement field allows avoiding shear correction factors. Concerning the thermal part, a high-order temperature field is considered through the thickness direction of the bi-directional graded beam. The capability of this novel formulation has been assessed through various thermal and thermo-mechanical tests. To this aim, the obtained numerical results from the proposed isogeometric formulation have been compared with thermo-elasticity solutions or other available results in open literature. It is found that the results obtained from the present beam formulation agree quite well with the reference results. (C) 2015 Elsevier Masson SAS. All rights reserved.
机译：使用计算成本低的等几何有限元模型研究了双向功能梯度材料（FGM）梁结构的完全耦合热机械行为。在提出的分析中，温度被视为主要变量。双向FGM光束的运动方程由精细的高阶全局局部理论描述。多项式和指数表达式的组合用于引入平面内位移场。平面内位移场的这种表示可以避免剪切校正因子。关于热部分，通过双向渐变光束的厚度方向考虑了高阶温度场。已经通过各种热和热机械测试评估了这种新颖配方的能力。为此，已公开的等几何公式获得的数值结果已与热弹性解或其他可用结果进行了比较。可以发现，从目前的光束公式获得的结果与参考结果非常吻合。 （C）2015 Elsevier Masson SAS。版权所有。

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