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首页> 外文期刊>Finite elements in analysis & design >Alternative positional FEM applied to thermomechanical impact of truss structures
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Alternative positional FEM applied to thermomechanical impact of truss structures

机译：替代位置有限元法应用于桁架结构的热机械冲击

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摘要

This paper presents a formulation to deal with dynamic thermomechanical problems by the finite element method. The proposed methodology is based on the minimum potential energy theorem written regarding nodal positions, not displacements, to solve the mechanical problem. The thermal problem is solved by a regular finite element method. Such formulation has the advantage of being simple and accurate. As a solution strategy, it has been used as a natural split of the thermomechanical problem, usually called isothermal split or isothermal staggered algorithm. Usual internal variables and the additive decomposition of the strain tensor have been adopted to model the plastic behavior. Four examples are presented to show the applicability of the technique. The results are compared with other authors' numerical solutions and experimental results.
机译：本文提出了一种用有限元方法解决动态热力学问题的公式。所提出的方法基于关于节点位置而非位移的最小势能定理，以解决机械问题。通过常规的有限元方法可以解决热问题。这样的配方具有简单而准确的优点。作为一种解决方案，它已被用作热机械问题的自然分裂，通常称为等温分裂或等温交错算法。通常的内部变量和应变张量的加法分解已被用来模拟塑性行为。给出了四个例子来说明该技术的适用性。将结果与其他作者的数值解和实验结果进行比较。

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