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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Consistent thermal stress calculation by using a new approach of the enhanced assumed strain method
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Consistent thermal stress calculation by using a new approach of the enhanced assumed strain method

机译：使用改进的假定应变方法的新方法进行一致的热应力计算

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摘要

A three-field hybrid functional with displacement, strain and stress assumptions has been proposed. By introducing the enhanced assumed strain concept to the proposed functional, a more general finite element formulation for the enhanced assumed strain method has been derived. Unlike the previous versio of the enhanced assumed strain method, the stresses can be evaluated from variational formulation within variational framework. The present formulation has been applied to the thermal stress problems and it has been addressed that, by suitable assumption of the enhanced assumed strains, the spurious oscillation of the thermal stresses can be successfully overcome. The process of designing the interpolation functions of the enhanced strains which guarantee the field-consistency of the strain field, is rational and systematic.
机译：提出了具有位移，应变和应力假设的三场混合函数。通过将增强的假定应变概念引入到所提出的函数中，已经得出了用于增强的假定应变方法的更通用的有限元公式。与以前的增强假定应变方法不同，可以从变体框架内的变体公式评估应力。本公式已经应用于热应力问题，并且已经解决了，通过适当假定增大的假定应变，可以成功地克服热应力的寄生振荡。设计增强应变的插值函数以保证应变场的场一致性的过程是合理而系统的。

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