金属薄片接头表面特性研究  

Study on the characteristics of sheet metal joint

作　　者：杨秀芝[1] 张锐[2] 肖新华[1] 杨春杰[1] 任桂华[1] 

机构地区：[1]湖北理工学院机电学院,湖北黄石435003 [2]武汉理工大学自动化学院,湖北武汉430070

出　　处：《湖北大学学报（自然科学版）》2015年第3期239-241,246,共4页Journal of Hubei University：Natural Science

基　　金：湖北省教育厅青年项目(Q20123001)资助

摘　　要：以不锈钢和灰铸铁材料为研究对象,在不同的压缩应力下,通过保护性四点测电阻法,测量模拟试样在反复拧紧和放松时两接触表面的微观变化规律,研究紧固件接头表面的变形.研究结果表明,被测试样表面在压应力远远小于其屈服应力时发生局部微塑性变形,可直接测量接触电阻的变化规律,对不便直接测量的局部微塑性变形进行研究.将变形时的实时在线非破坏性检测,间接运用到紧固件服御状态下的质量监控和耐用性的研究中.With stainless steel and cast iron materials as the research object, in different compression stress, through the protection method of four point resistance, on the repeated tightening and relaxing pressure stress, the two contact surface micro deformation of the fastener joint surface of simulated specimens were measured. The research results show that the test sample surface generates local micro plastic deformation when pressure stress are less than the yield stress of the material. The non destructive testing research of online realtime deformation can use to monitor the durability and corrosivity of among the fasteners.

关 键 词：无损检测 塑性变形 接头界面 接触电阻 

分 类 号：TG376[金属学及工艺—金属压力加工]