电焊机2018，Vol.48Issue(3)：97-101,5.DOI:10.7512/j.issn.1001-2303.2018.03.17
焊接残余应力在循环拉伸载荷作用下演变规律
Welding residual stress evaluation law under cyclic tensile load
摘要
Abstract
Low cycle loading testing method with the PWS-100 low frequency fatigue machine and high cycle loading testing method with the QBG-100 high frequency fatigue machine were used to test the A6605-T6 aluminum alloy welded joints.The dynamic strain test machine was used to test the strain value of the above two fatigue method.The results showed that the strain value of No.1～4 all changed after the first time loading under the low cycle loading method but the strain value didn't change after second time loading to 10 million times loading.With the cycle times have changed from 10 thousand times to 10 million times,the strain value of N0.1～4 didn't change.So the results showed that the welded joints didn't show new plastic deformation with the increase of the cycle times,so the welding residual stress didn't continue to relax with the incrrease of the cycle times.关键词
残余应力/A6005-T6铝合金/低周次加载/高周次加载/应变量Key words
residual stress/A6005-T6 aluminum alloy/low cycle loading/high cycle loading/strain value分类
矿业与冶金引用本文复制引用
于金朋,朱忠尹,何天,黄雪飞..焊接残余应力在循环拉伸载荷作用下演变规律[J].电焊机,2018,48(3):97-101,5.基金项目
中国铁路总公司科技研究开发计划(2016J011-C) （2016J011-C）
