Numerical and experimental investigation of three-dimensional strains in adhesively bonded joints
Numerical and experimental investigation of three-dimensional strains in adhesively bonded joints
复制标题
胶接接头三维应变的数值和实验研究
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
G. M. Swallowe
中科院分区：
文献类型：
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作者：
P. Ruiz;F. Jumbo;A. Seaton;J. Huntley;I. Ashcroft;G. M. Swallowe
利用中子衍射(ND)和云纹干涉(MI)的互补实验技术，对拉伸载荷作用下粘接双搭接剪切接头的应变分布进行了实验研究。ND提供了样品内部的三维应变值，而MI提供了表面上的面内应变分量的高分辨率地图。将从铝和钢接头获得的综合数据集与有限元(FE)预测进行了比较。通过建立有限元模型并与实验数据进行详细比较，评估了一系列因素(如二维与三维几何形状、样品不对称性、残余应变)的重要性。主要结论是，有限元分析可以准确地预测粘接搭接接头粘结物中的应变，在粘接接头分析中常用的许多接头简化是合理的，因为与样品间的变化和设计粘接接头时使用的安全系数相比，简化后的接头产生的差异相对较小。
Strain distributions within adhesively bonded double-lap shear joints under tensile load have been investigated experimentally using the complementary experimental techniques of neutron diffraction (ND) and moire interferometry (MI). ND provides three-dimensional strain values within the samples, whereas MI gives high-resolution maps of the in-plane strain components at the surface. The resulting comprehensive datasets obtained from both aluminium and steel joints were compared against finite element (FE) predictions. The importance of a range of factors (e.g. two-dimensional versus three-dimensional geometry, sample asymmetry, residual strains) was assessed through development of the FE model and detailed comparison with the experimental data. The main conclusions were that FEA can be used accurately to predict strains in the adherends of bonded lap joints and that many of the simplifications of the joints commonly used in the analysis of bonded joints are justified as including them results in relatively small differences compared with sample-to-sample variation and the safety factors used in designing bonded joints.