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首页> 外文期刊>Journal of thermal stresses >AXIOMATIC/ASYMPTOTIC EVALUATION OF REFINED PLATE MODELS FOR THERMOMECHANICAL ANALYSIS
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AXIOMATIC/ASYMPTOTIC EVALUATION OF REFINED PLATE MODELS FOR THERMOMECHANICAL ANALYSIS

机译：热力学分析的精制板模型的公理/渐近评估

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摘要

This work deals with refined models for the thermal stress analysis of multilayered plates. The Carrera Unified Formulation has been used in order to generate refined models of any order, and both equivalent single layer (ESL) and layer-wise (LW) schemes have been adopted. A Navier-type solution has been employed and, as a result, only simply supported orthotropic plates have been considered. A linear temperature distribution along the thickness direction is considered. The purpose of this work is to establish the relevance of the displacement variables and to discard the irrelevant terms in order to obtain refined models with the same accuracy as full theories, but with a lower computational cost. The axiomatic/asymptotic technique has been employed. The effectiveness of each displacement variable has been measured considering the influence of several parameters, such as the length-to-thickness ratio (a/h), the stacking sequence and the kind of material (isotropic and orthotropic). The "best" reduced models have been proposed and their relative stress and displacement components distributions along the thickness direction have been discussed. It has been found that the relevance of each displacement variable is affected to a great extent by the problem considered. In addition, it has been demonstrated that the nature of the load (mechanical or thermal) leads to the necessity of retaining different displacement variables for a given problem.
机译：这项工作涉及多层板热应力分析的改进模型。已使用Carrera统一配方来生成任何顺序的精炼模型，并且已采用等效单层（ESL）和逐层（LW）方案。已经采用了Navier型解决方案，因此，仅考虑了简单支撑的正交各向异性板。考虑沿厚度方向的线性温度分布。这项工作的目的是建立位移变量的相关性，并丢弃不相关的项，以便获得与完整理论相同的精度但计算成本较低的精炼模型。公理/渐近技术已被采用。在考虑多个参数（例如长/厚比（a / h），堆垛顺序和材料种类（各向同性和正交各向异性））的影响下，测量了每个位移变量的有效性。提出了“最佳”简化模型，并讨论了它们沿厚度方向的相对应力和位移分量分布。已经发现，所考虑的问题在很大程度上影响了每个位移变量的相关性。另外，已经证明，负载的性质（机械的或热的）导致对于给定的问题需要保持不同的位移变量。

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