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不锈钢CHS柱有限元模型的验证

Validation of Stainless-Steel CHS Columns Finite Element Models.

作者信息

Jindra Daniel, Kala Zdeněk, Kala Jiří

机构信息

Institute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 60200 Brno, Czech Republic.

出版信息

Materials (Basel). 2021 Apr 4;14(7):1785. doi: 10.3390/ma14071785.

DOI:10.3390/ma14071785
PMID:33916591
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8038467/
Abstract

Stainless-steel elements are increasingly used in a wide range of load-bearing structures due to their strength, minimal maintenance requirements, and aesthetic appearance. Their response differs from standard steels; therefore, it is necessary to choose a different procedure when creating a correct computational model. Seven groups of numerical models differing in the used formulation of elements integration, mesh density localization, nonlinear material model, and initial geometric imperfection were calibrated. The results of these advanced simulations were validated with published results obtained by an extensive experimental approach on circular hollow sections columns. With regard to the different slenderness of the cross-sections, the influence of the initial imperfection in the form of global and local loss of stability on the response was studied. Responses of all models were validated by comparing the averaged normalized ultimate loads and the averaged normalized deflections with experimentally obtained results.

摘要

由于不锈钢元件具有强度高、维护要求低和美观的外观，它们在各种承重结构中越来越多地被使用。它们的响应与标准钢不同；因此，在创建正确的计算模型时需要选择不同的程序。校准了七组数值模型，这些模型在单元积分公式、网格密度定位、非线性材料模型和初始几何缺陷方面存在差异。这些先进模拟的结果与通过对圆形空心截面柱进行广泛实验方法获得的已发表结果进行了验证。考虑到横截面的不同长细比，研究了以整体和局部稳定性丧失形式存在的初始缺陷对响应的影响。通过将平均归一化极限荷载和平均归一化挠度与实验结果进行比较，验证了所有模型的响应。

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Materials (Basel). 2020 Feb 21;13(4):979. doi: 10.3390/ma13040979.
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Compressive Behavior and Constitutive Model of Austenitic Stainless Steel S30403 in High Strain Range.高应变范围内奥氏体不锈钢S30403的压缩行为及本构模型
Materials (Basel). 2018 Jun 15;11(6):1023. doi: 10.3390/ma11061023.