Finite element modeling of bolted connections in thin-walled stainless steel plates under static shear
Finite element modeling of bolted connections in thin-walled stainless steel plates under static shear
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DOI：
10.1016/j.tws.2007.03.006
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发表时间：
2007-04-01
影响因子：
6.4
通讯作者：
Kuwamura, Hitoshi
中科院分区：
文献类型：
--
作者：
Kim, Tae Soo;Kuwamura, Hitoshi
最近进行的试验研究表明，目前的日本钢设计标准(AIJ)不能准确地预测由薄壁(冷弯)SUS304奥氏体板制成的螺栓连接在静剪作用下的极限行为，从而提出了考虑不锈钢和薄壁钢板力学性能的极限强度计算修正公式。本文在已有试验数据的基础上，利用ABAQUS程序建立了三维实体单元有限元模型，研究了薄壁不锈钢螺栓剪力节点的结构性能。为了预测螺栓联接的载荷-位移曲线，进行了非线性材料分析和非线性几何分析。在无几何缺陷的有限元模型中，还观察到了试验试件中连接板端部发生的离面翘曲变形，定量地考察了翘曲对极限强度的影响，提出了适用于预测螺栓连接失效模式的失效准则。此外，将有限元分析的结果与以往的试验结果进行了比较，有限元分析推荐的程序所预测的破坏模式和极限强度与试验结果具有很好的相关性，数值方法能够提供较高的精度。(C)2007爱思唯尔有限公司。保留所有权利。
The recently performed experimental study indicates that the current Japanese steel design standards (AIJ) cannot be used to predict accurately the ultimate behavior of bolted connections loaded in static shear, which are fabricated from thin-walled (cold-formed) SUS304 austenite stainless steel plates and thus, modified formula for calculating the ultimate strength to account for the mechanical properties of stainless steel and thin-walled steel plates were proposed. In this study, based on the existing test data for calibration and parametric study, finite element (FE) model with three-dimensional solid elements using ABAQUS program is established to investigate the structural behavior of bolted shear connections with thin-walled stainless steel plate. Non-linear material and non-geometric analysis is carried out in order to predict the load-displacement curves of bolted connections. Curling, i.e., out of plane deformation of the ends of connection plates which occurred in test specimens was also observed in FE model without geometric imperfection, the effect of curling on the ultimate strength was examined quantitatively and the failure criteria which is suitable to predict failure modes of bolted connections was proposed. In addition, results of the FE analysis are compared with previous experimental results, failure modes and ultimate strengths predicted by recommended procedures of FE showed a good correlation with those of experimental results and numerical approach was found to provide estimates with reasonable accuracy. (C) 2007 Elsevier Ltd. All rights reserved.