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运用有限元法研究了偏轴、同轴和折曲型等三种单搭接胶接接头的工作应力分布规律。结果表明:与其他两种接头相比,折曲型单搭接胶接接头可有效降低搭接区端部的剥离应力和剪切应力峰值;在数值分析所用参数及条件下,I型折曲接头的剥离应力降幅超过了75%,其他峰值应力的降幅也超过了45%～50%,并且应力分布趋于均匀;I型折曲接头使出现应力峰值的位置从搭接区的端部转移至中部,从而显著提高了接头的承载能力,是一种优于普通同轴接头的胶接接头形式;对于受剪切载荷作用的接头而言,采用II型折曲接头更为合理,可进一步提高接头承受剪切载荷的能力。
Finite element method was used to study the working stress distribution of three kinds of single lap joints, such as off-axis, coaxial and flexural modes. The results show that, compared with the other two kinds of joints, the bending type single lap joints can effectively reduce the peel stress and the peak shear stress at the ends of lap joints. Under the parameters and conditions of numerical analysis, The peel stress of the joint drops by more than 75%, the other peak stress drops by more than 45% -50%, and the stress distribution tends to be uniform. The I-bend joint shifts the stress peak position from the end of the overlap zone To the middle, thus significantly improving the carrying capacity of the joint, is a better than common coaxial connector adhesive form; for the role of shear load joints, the use of Type II bend joint is more reasonable, and further Improve the ability of joints to withstand shear loads.