STRESS ANALYSIS AND DESIGN OF ADHESIVE-BONDED CYLINDRICAL LAP JOINT

在这项研究中，我们考虑了轴向拉伸下粘接圆柱搭接接头的应力分布。对弹性-粘弹性和冲击问题进行了数值研究，得到了以下结论：(1)对于薄粘着物，面内拉伸载荷会引起接头的相当大的弯曲。法向(剥离)应力在端部达到峰值，而在关节内部相当大的区域内是压缩的。法向应力甚至可以大于剪切应力。(2)随着胶膜厚度的增加，更多的粘接材料可用于吸收差异应变，而应力减少。(3)随着剪切模数的增加，最大应力随着剪切模数的增加而增加。(4)随着粘结物的硬度增加，接头的弯曲阻力增加，从而最大应力降低。作为设计建议，粘接中的最大法向(剥离)应力和剪应力可以通过(1)使用柔性和刚性粘接的组合，以及(2)使用更坚硬的搭接粘合剂来降低。

In this study, we consider the stress distribution in adhesive-bonded cylindrical lap joint under axial tension. A numerical study is carried out for the elastic-viscoelastic and impact problems.The following conclusions can be dawn from this investigation.(1) In the case of the thin adherends, the tensile in-plane load causes considerable bending in the joint. The normal (peel) stress peak at the ends, while they are compressive over a sizeable region in the joint interior. The normal stress can be even larger than the shear stresses.(2) As adhesive film thickness increases, more adhesive material is available to absorb differential straining and stresses decrease.(3) As shear modulus increases, the maximum stresses increase with the shear modulus increases.(4) As the stiffness of the adherends increase, the resistance of the joint to bending increases, and therefore the maximum stresses decrease.As a design suggestion, the maximum normal (peel) and shear stresses in the bond can be reduced by (1) using a combination of flexible and stiff bonds, and (2) using stiffer lap adherends.