不同跨度尺寸对铝管能量吸收和塑性破坏的影响  

Effect of different span sizes on energy absorption and plastic failure of aluminum tubes

作　　者：赵雷 徐雨 张华 ZHAO Lei;XU Yu;ZHANG Hua(School of Electrical and Electronic Engineering,Chongqing Vocational and Technical University of Mechatronics,Chongqing 402760,China;Key Laboratory of Advanced Maufacturing Technology Ministry of Education,Guizhou University,Guiyang 550025,China)

机构地区：[1]重庆机电职业技术大学电气与电子工程学院,重庆402760 [2]贵州大学现代制造技术教育部重点实验室,贵州贵阳550025

出　　处：《塑性工程学报》2019年第5期302-307,共6页Journal of Plasticity Engineering

基　　金：重庆市教委科学技术研究项目(KJQN201803703)

摘　　要：针对设备中铝管的能量吸收和塑性破坏能力对设备运转的精度和效率的影响问题,提出以滑靴副摩擦磨损试验机中6061-T4铝管为研究对象,以三点准静态下不同跨度尺寸为变量,对三点准静态横向载荷作用下铝管塑性破坏程度和能量吸收值进行研究。提出两种试验理论,并运用ISTRON-8801铝管拉伸试验机进行了实验分析。结果表明:经过横向标准三点处弯曲加载的圆形铝管经历了3个塑性变形阶段:起皱阶段-起皱与弯曲阶段-结构崩溃阶段;不同跨度(100、150、200和250 mm)时,铝管承受的最大载荷和吸收的应变能量随跨度的增加而减小。Aiming at the problem that the energy absorption and plastic failure ability of aluminum tubes in the equipment have great influence on the precision and efficiency of equipment operation,6061-T4 aluminum tube in slipper pair friction and wear teste machine was taken as the research object,the plastic failure degree and energy absorption of aluminum tubes under three-point quasi-static transverse loading were studied with different span sizes as variables. Two kinds of test theories were put forward and tests were conducted by ISTRON-8801 aluminum tube tensile tester. The results show that the circular aluminum tube subjected to bending loading at three transverse bending points undergoes three plastic deformation stages: wrinkling stage,wrinkling and bending stage,and structural collapse stage. At different spans( 100,150,200,and 250 mm),the maximum load and absorbed strain energy of aluminum tubes decrease with the increase of spans.

关 键 词：铝管 能量吸收 塑性破坏 准静态 不同跨度 

分 类 号：TB302[一般工业技术—材料科学与工程]