基于临界应力强度因子的胶接对接接头抗拉强度简便预测方法  

A CONVENIENT ADHESIVE STRENGTH PREDICTION METHOD FOR ADHESIVE BUTT JOINT IN TERMS OF THE CRITICAL STRESS INTENSITY FACTOR

作　　者：李戎 梁斌[1] NODA Nao-Aki 

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]九州工业大学机械系,日本北九州市804-8550

出　　处：《工程力学》2017年第11期218-224,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51105132,11402077)

摘　　要：为了能够对胶接对接接头进行抗拉强度预测,该文以有限元分析方法为基础,通过利用参考问题的无量纲应力强度因子、接头模型与参考问题模型之间应力值的比值以及接头抗拉强度的试验数值,得到了胶接对接接头的临界应力强度因子数值,从而提出了一个基于临界应力强度因子的胶接对接接头抗拉强度的简便预测新方法。该方法能够在保证精确度的基础上快速计算出胶接对接接头的应力强度因子,通过使用任意某一胶层厚度时的抗拉强度试验数值预测出其他胶层厚度时对接接头的抗拉强度数值。通过三种胶接对接接头的算例对比分析,证明了该方法的预测结果与实际结果非常接近,预测精度良好,便于工程应用。For the purpose of predicting the tensile strength for adhesive butt joint, a convenient adhesive strength prediction method is presented in terms of the critical stress intensity factor. Based on the finite element method and adhesive tensile strength, the critical stress intensity factor can be obtained conveniently and accurately since the reference problem has exact solutions. Then, a new prediction method for the adhesive butt joint is proposed based on the conclusion that the critical stress intensity factor is almost independent of the adhesive thickness. In this paper, the predicted adhesive strengths for adhesive butt joints with different adhesive thicknesses can be obtained conveniently by using only one arbitrary reference tensile strength. To verify the correctness of this method, the measured and predicted adhesive tensile strength for adhesive butt joints with three kinds of material combinations are analyzed. The calculation results indicated that the predicted results coincide with the experimental results. The validity and usefulness of the proposed method in engineering application is proved.

关 键 词：胶接对接接头 粘结抗拉强度预测 有限元分析方法 临界应力强度因子 胶层厚度 

分 类 号：TG495[金属学及工艺—焊接] TG494.2