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首页> 外文期刊>International Journal for Numerical Methods in Engineering >A hybrid stress ACS solid-shell element and its generalization for smart structure modelling. Part I-solid-shell element formulation
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A hybrid stress ACS solid-shell element and its generalization for smart structure modelling. Part I-solid-shell element formulation

机译：混合应力ACS实体单元及其在智能结构建模中的推广。第一部分固体壳配方

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摘要

In the recent years, solid-shell finite element models which possess no rotational degrees of freedom and applicable to thin plate/shell analyses have attracted considerable attention. Development of these elements are not straightforward. Shear, membrane, trapezoidal, thickness and dilatational lockings must be envisioned. In this part of this paper, a novel eight-node solid-shell element is proposed. To resolve the shear and trapezoidal lockings, the assumed natural strain (ANS) method is resorted to. the hybrid-stress formulation is employed to rectify the thickness and dilatational locking. The element is computationally more efficient than the conventional hybrid elements by adopting orthogonal-assumed stress modes and enforcing admissible sparsity in the flexibility matrix. Popular benchmark tests are exercised to illustrate the efficacy of the elements. In Part II of the paper the element will be generalized for smart structure modelling by including the piezoelectric effect.
机译：近年来，没有旋转自由度并适用于薄板/壳分析的固体壳有限元模型引起了极大的关注。这些要素的开发并不简单。必须考虑剪切，隔膜，梯形，厚度和膨胀锁定。在本文的这一部分中，提出了一种新颖的八节点固体壳单元。为了解决剪切锁定和梯形锁定，采用假定的自然应变（ANS）方法。混合应力配方用于校正厚度和膨胀锁定。通过采用正交假定的应力模式并在柔韧性矩阵中强制允许的稀疏性，该元素在计算上比常规混合元素更有效。进行了流行的基准测试以说明这些元素的功效。在本文的第二部分中，将通过包含压电效应将元素推广到智能结构建模中。

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