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Efficient solid–shell finite elements for quasi-static and dynamic analyses and their application to sheet metal forming simulation

机译:用于准静态和动态分析的高效固-壳有限元及其在钣金成形仿真中的应用

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摘要

Thin structures are commonly designed and employedin engineering industries to save material, reduce weight and improve the overall performance of products. The finite element (FE) simulation of such thin structural components has become a powerful and useful tool in this field. For the last few decades, much attention and effort have been paid to establish accurate and efficient FE. In this regard, the solid–shell concept proved to be very attractive due to its multiple advantages. Several treatments are additionally applied to the formulation of solid–shell elements to avoid all locking phenomena and to guarantee the accuracy and efficiency during the simulation of thin structures. The current contribution presents a family of prismatic and hexahedral assumed-strain based solid–shell elements, in which an arbitrary number of integration points are distributed along the thickness direction. Both linear and quadratic formulations of the solid–shell family elements are implemented into ABAQUS static/implicit and dynamic/explicit software to model thin 3D problems with only a single layer through the thickness. Twopopular benchmark tests are first conducted, in both static and dynamic analyses, for validation purposes. Then, attention is focused on a complex sheet metal forming process involving large strain,plasticity and contact.
机译:薄结构通常在工程行业中设计和使用,以节省材料,减轻重量并改善产品的整体性能。这种薄结构部件的有限元(FE)模拟已成为该领域的强大工具。在过去的几十年中,为建立准确,有效的有限元分析付出了很多的精力和精力。在这方面,由于其多重优势,实心壳概念被证明非常具有吸引力。另外,还对固体-壳单元的配方进行了多种处理,以避免所有锁定现象,并在模拟薄结构时确保准确性和效率。当前的贡献提出了一个基于棱柱和六面体假定应变的固体壳单元,其中沿厚度方向分布有任意数量的积分点。 ABAQUS静态/隐式和动态/显式软件都实现了固体-壳族元素的线性和二次方公式化,从而仅通过厚度的单个层即可对薄3D问题进行建模。首先在静态和动态分析中进行两种流行的基准测试,以进行验证。然后,注意力集中在涉及大的应变,可塑性和接触性的复杂的金属板成形过程上。

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