中国舰船研究Issue(3)：62-68,7.DOI:10.3969/j.issn.1673-3185.2014.03.009
交变载荷下厚板对接焊残余应力的松弛行为
Relaxation Performance of Thick Plates' Butt-Welding Residual Stress Under Alternating Loads
摘要
Abstract
For welded structures subjected to dynamic loadings, the welding residual stress has tremen-dous influences to the structural fatigue life. However, due to the complexity of the welding residual stress and the uncertainties of the welding residual stress relaxation under alternating loads, the residual stress re-laxation research can be rather difficult. So far, only few researches have been conducted within this area to study the relaxation and redistribution of the welding residual stress in thick plates, especially for the weld-ed structures under dynamic loadings. Under the low-cycle fatigue loading conditions, an experiment is car-ried out on a thick welded plate of 100 mm;with help from X-ray stress testing apparatus to, the process of how alternating loads affect the redistribution of residual stress is analyzed. By arranging the test points around the welding line, a series of data inputs of residual stress is obtained, with which a time-varying re-distribution regarding the surface residual stresses relaxation is presented. It is concluded that residual stress distribution can be changed by the alternating loads, and the alternating loads do contribute to the re-distribution of the residual stress field.关键词
残余应力松弛/时变分布/交变应力/厚板/焊接结构Key words
residual stress relaxation/time-varying redistribution/alternating loads/thick plate/weld-ed structure分类
交通工程引用本文复制引用
李陵,罗白璐,郑绍文..交变载荷下厚板对接焊残余应力的松弛行为[J].中国舰船研究,2014,(3):62-68,7.基金项目
国家部委基金资助项目 （）
