刘黎明

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:哈尔滨工业大学

学位:博士

所在单位:材料科学与工程学院

电子邮箱:liulm@dlut.edu.cn

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Static mechanics analyses of different laser weld bonding structures in joining AZ61 Mg alloy

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论文类型:期刊论文

发表时间:2011-10-01

发表刊物:INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES

收录刊物:Scopus、SCIE、EI

卷号:31

期号:7

页面范围:660-665

ISSN号:0143-7496

关键字:Fracture mechanics; Lap-shear; Peel; Laser weld bonding

摘要:This paper presents the results of recent investigations on laser seam weld bonding (LWB) of magnesium alloy AZ61 sheets. There are two types of LWB structures: perpendicular weld seam (LWB-PE) and parallel weld seam (LWB-PA). In this paper the differences between the two structures are compared and discussed. In tensile shear tests, both LWB-PE and LWB-PA joints can offer higher failure force than that of laser welding or adhesive bonding alone, and LWB-PA joint offers better performance than LWB-PE joint. This is because the weld seam can increase the peel resistance at the free end of the adhesive bonded part, where a stress concentration exists. Maximum T-Peel strengths of LWB joints depend on the laser seam weld. The LWB-PA joint has both the advantages of maximum failure force caused by laser weld and the peel displacement caused by adhesive, so a synergistic effect is obtained in energy absorption. (C) 2011 Elsevier Ltd. All rights reserved.