拉伸速率对钢板胶接接头力学性能的影响  

Effect of Tensile Speed on Mechanical Properties of Adhesive-bonded Steel

作　　者：鹿伟青 朱传敏[1] 牛耀民 叶又[2] 康柳根[2] 

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]泛亚汽车技术中心有限公司,上海201201

出　　处：《材料科学与工程学报》2017年第1期52-56,共5页Journal of Materials Science and Engineering

摘　　要：本文对两种钢板单搭胶接接头在不同的拉伸速率下(准静态、10m/s、20m/s)实验研究了不同拉伸速率对两种钢板接头力学性能的影响。结果表明钢板胶接接头在高速拉伸(10m/s、20m/s)时的强度相对于准静态(13mm/min)有明显提高,并且随着拉伸速率的增加而增大。这是由于在高速拉伸时接头及胶层高速形变,应变率大大增大,胶层粘性因素所产生的应力大大增加,使得接头强度提升。失效模式也随着发生改变,呈现出脆性断裂模式。被粘物材料性能的不同也会对接头强度产生影响,且这种影响随着拉伸速率的增加逐渐减小。Adhesive-bonded steel is widely used as automotive steel.At different tensile speed（13mm/min、10m/s、20m/s）,two tensile tests of different adhesive-bonded steel were performed.The influence of mechanical properties caused by tensile speed was developed.For two different adhesive-bonded steel joints,the tensile strength at high tensile speed（10m/s、20m/s）is much higher than that at quasi-static speed（13mm/min）,and the tensile strength goes up with the increase of the tensile speed.Because at high tensile speed,the deform speed of adhesive-bonded joints and the adhesive is also very high.In this case,the stress produced by the viscous factors increase greatly,and the strength of the adhesive-bonded joints is developed.The failure mode is also changed to brittle failure mode.The strength of the adhesive-bonded joints is also influenced by the properties of adherend,and the influence decreases with the increase of the tensile speed.

关 键 词：汽车钢板 胶接接头 拉伸速率 力学性能 

分 类 号：TG495[金属学及工艺—焊接]