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首页> 外文期刊>Applied Mathematical Modelling >Formulation of hybrid Trefftz finite element method or elastoplasticity
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Formulation of hybrid Trefftz finite element method or elastoplasticity

机译:混合Trefftz有限元法或弹塑性的公式化

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摘要

The present investigation provides a hybrid Trefftz finite element approach for analysing elastoplastic problems. A dual variational functional is constructed and used to derive hybrid Trefftz finite element formulation for elastoplasticity of bulky solids. The formulation is applicable to either strain hardening or elastic-perfectly plastic materials. A solution algorithm based on initial stress formulation is introduced into the new element model. The performance of the proposed element model is assessed by three examples and comparison is made with results obtained by other approaches. The hybrid Trefftz finite element approach is demonstrated to be particularly suited for nonlinear analysis of two-dimensional elastoplastic problems.
机译:本研究提供了一种混合Trefftz有限元方法来分析弹塑性问题。构造了一个双变分泛函,并用于导出混合的Trefftz有限元公式,以实现大体积固体的弹塑性。该配方适用于应变硬化或弹性完美的塑料材料。在新的单元模型中引入了基于初始应力公式的求解算法。通过三个示例评估了提出的元素模型的性能,并与其他方法获得的结果进行了比较。混合Trefftz有限元方法被证明特别适用于二维弹塑性问题的非线性分析。

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