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An efficient stress and deformation model for arbitrary elastic-perfectly plastic adhesive lap joints
International Journal of Adhesion and Adhesives ( IF 3.4 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.ijadhadh.2020.102679
H. Mardani , N. Stein , P.L. Rosendahl , W. Becker

Abstract The present work introduces an efficient general sandwich-type model that allows for stress analyses of arbitrarily shaped adhesive lap joints with composite adherends with an elastic-perfectly plastic adhesive layer obeying the von Mises yield criterion. For the analysis of the nonlinear adhesive layer the plastic zone approach is applied. The model is applicable to various joint configurations, as e.g. single-lap joints, T-joints, L-joints, reinforcement patches or balanced double-lap joints. It considers only the overlap region of the joint with any combination of section forces and moments and is therefore denoted as sandwich-type model. First Order Shear Deformation Theory is employed to account for shear deformations of the composite adherends. Bending extension coupling is covered. The adhesive layer is assumed to be very thin compared to the thickness of the adherends and the shear and peel stress distributions are assumed as constant through the bondline thickness. To allow for a comparison of several different structural situations a two-dimensional Finite Element model of the overlap region is used. The stress distributions predicted by the present model are in good agreement with the results of detailed Finite Element analyses.

中文翻译:

任意弹-塑胶搭接接头的有效应力变形模型

摘要 目前的工作介绍了一种有效的通用夹层型模型,该模型允许对任意形状的粘合剂搭接接头与复合被粘物进行应力分析,并具有符合 von Mises 屈服准则的弹性-完美塑性粘合剂层。对于非线性粘附层的分析,应用了塑性区方法。该模型适用于各种接头配置,例如单搭接接头、T 型接头、L 型接头、加固补片或平衡双搭接接头。它仅考虑具有截面力和力矩的任意组合的接头的重叠区域,因此表示为夹层型模型。采用一阶剪切变形理论来解释复合粘附体的剪切变形。弯曲扩展联轴器被覆盖。假定粘合剂层与被粘物的厚度相比非常薄,并且假定剪切应力和剥离应力分布在整个粘合层厚度范围内保持恒定。为了比较几种不同的结构情况,使用了重叠区域的二维有限元模型。本模型预测的应力分布与详细有限元分析的结果非常一致。
更新日期:2020-12-01
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