首页    期刊浏览 2024年11月08日 星期五
登录注册

文章基本信息

  • 标题:ランダム荷重下での疲労挙動に関する研究 (第6報) ワイブル分布ランダム荷重下での軟鋼溶接継手の疲労強度線図
  • 本地全文:下载
  • 作者:冨田 康光 ; 橋本 聖史 ; 田所 誠次郎
  • 期刊名称:日本造船学会論文集
  • 印刷版ISSN:0514-8499
  • 电子版ISSN:1884-2070
  • 出版年度:1989
  • 卷号:1989
  • 期号:166
  • 页码:373-380
  • DOI:10.2534/jjasnaoe1968.1989.166_373
  • 出版社:The Japan Society of Naval Architects and Ocean Engineers
  • 摘要:

    At present, the most reliable fatigue design for structures subjected to service loading is considered to be one based on fatigue strength diagrams. These diagrams would have to be obtained from actual service loading fatigue tests or random loading fatigue tests simulating service loading. However, it would take a very long time to complete the necessary experiments, so long as to be impossible. In the previous paper, the authors proposed a new method of developing fatigue strength diagrams under random loading conditions. This method combines random loading test plus an equation, and promises to reduce by 95-99 percent the time required for ordinary random loading fatigue tests with the Weibull distribution. In this paper, using the proposed method, fatigue strength diagrams for butt and fillet welds of mild steel were obtained for load-controlled axial pulsating tension random loading with the Weibull distribution. Shape coefficient in the Weibull distribution was chosen to be 0.75, 1.0 and 1.25. Strength diagrams with these welds were also derived by means of UKDOE Guidance and AWS Code. The main results obtained in this study are as follows. 1) Fatigue strength diagrams, represented by shape coefficients as a parameter, are approximated by paralell straight lines in semi-log coordinate. 2) Fatigue strength decreases by about ten precent or fatigue life about one-hundredth as shape coefficient increases by 0.25, from 0.75 to 1.25. 3) Strength diagrams for both welds, obtained by those two organizations, lead to divergent final designs.

国家哲学社会科学文献中心版权所有