摘要
基于成组法、升降法试验,绘制出不锈钢点焊接头S-N曲线,根据所绘制的S-N曲线和升降法试验数据分析比较确定S-N曲线在转折点处需要进行转折过渡.为了使制定出的S-N曲线和转折点疲劳寿命N0具有更好的实际工程应用价值,提出了过渡点处采用变斜率斜线段连接的理论及方法.通过试验验证了S-N曲线转折点处采用变斜率斜线段过渡方法的可行性,并对两条曲线进行了比较分析.结果表明,利用新方法绘制的S-N曲线能更准确的显示点焊接头的性能.
Based on the ladder method and the group method,the S- N curve of stainless steel welding fittings was drawn. According to comparing drawn S-N curve with the ladder method data,the turning point of S- N curve requires turning transition. In order to make the S- N curve and the breaking point N0 have more engineering application value,the theory and method of transition point connected with variable slope curve was proposed. The feasibility of using variable slope method has been verified by experiment,and the two curves were compared by analysis. The results show that the new method of drawing the S- N curve can display the performance of welding joints spot more accurately.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第8期35-38,114,共6页
Transactions of The China Welding Institution
基金
科技部国际合作资助项目(2009DFR80040)
关键词
点焊接头
S-N曲线
转折点
变斜率斜线段过渡
spot welded joints
S-N curve
breaking point N0
variable slope slash transition
