摘要
为深入研究铜钢板压印-粘接复合连接的静力学性能和失效机理,本文选取铜合金H62同种组合及与镀锌钢的异种组合进行单搭及T型试件压印-粘接复合连接,借助MTS材料试验机对试件进行拉伸-剪切试验及剥离试验,采用SEM扫描电镜对典型失效断口进行微观分析,分析试件的失效强度及失效模式,测试铜合金压印-粘接复合连接接头的静力学性能,结果表明:铜钢板压印-粘接复合连接的抗剪切强度远优于抗剥离强度,且其接头强度主要由粘接剂决定,失效模式取决于压印结构成型情况.H62-H62压印-粘接复合接头的抗剪切力强度均值为5 021.52 N,抗剥离强度均值为943.05 N,接头为拉脱失效伴随轻微擦伤;H62-镀锌钢压印-粘接复合接头的抗剪切强度为H62-H62接头的1.2倍,失效模式为颈部断裂;抗剥离强度为H62-H62接头的2.3倍,接头为"上板撕裂"失效.
In present study,in order to study the mechanical properties and fracture mechanism of clinch-bonded hybrid joints on copper alloy and galvanized steel,the specimens of clinch-bonded hybrid joints in similar and dissimilar sheets of H62 copper alloy in single-lap and T joints are prepared.Tensile-shear tests and peeling tests are carried out by MTS landmark electric servo-hydraulic material test machine,and their failure fractures are observed in the scanning electron microscope to analyze the failure modes and to characterize the mechanical properties of different joints.It is shown through the test results that the shear strength of clinch-bonded hybrid joints on copper alloy and galvanized steel is much better than their peeling strength,that the strength of joints primarily depends on adhesive and that its failure modes rely on the interlock structure of clinching joints.For clinch-bonded hybrid joints,the average shear strength of H62-H62 joints is 5 021.52 N and its average peeling strength reaches 943.05 N following the failure mode of bottom separation with slightly scratch.H62-galvanized steel joints show higher average shear strength,which is 1.2 times of H62-H62 joints results to neck fracture failure mode and higher average peeling strength of 2.3 times of H62-H62 joints following failure mode of ＂upper sheet tear fracture＂.
出处
《昆明理工大学学报（自然科学版）》
CAS
2017年第4期38-44,共7页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(51565023
51565022)
云南省教育厅科学研究基金重大专项项目(ZD201504)
作者简介
雷蕾（1992-），女，博士研究生。主要研究方向：薄板材料连接新技术．E—mail：15559873147@163.com
通信作者：何晓聪（1955-），男，博士，教授，博士生导师．主要研究方向：薄板材料连接新技术．E-mail：xiaocong_he@126．com
