东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (7): 964-967.DOI: -

• 论著 • 上一篇    下一篇

MY准则解析X80钢油气输送管道爆破压力

李灿明;赵德文;章顺虎;周平;   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;莱芜钢铁集团技术中心;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(51074052)

Analysis of burst pressure for X80 steel pipeline with MY criterion

Li, Can-Ming (1); Zhao, De-Wen (1); Zhang, Shun-Hu (1); Zhou, Ping (2)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China; (2) Laiwu Iron and Steel Group Technical Centre, Laiwu 271104, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Zhao, D.-W.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

650

摘要： 用平均屈服(MY)准则,对受内压作用无缺陷输油管线进行塑性极限分析,求得爆破压力公式的解析解.此解计算了某厂轧制的X80钢的爆破压力,将其和Tresca,Mises和TSS屈服准则得到的爆破压力进行了比较.结果表明爆破压力是由屈强比(ReL/Rm)决定的硬化指数n,管线原始几何尺寸厚径比t0/D0以及抗拉强度的函数;爆破压力随管线钢应变硬化指数的增大而减小,随管道厚径比及抗拉强度的增大而增大.Tresca屈服准则提供爆破应力下限,TSS屈服准则提供爆破压力上限,MY准则预测的爆破压力恰居二者中间,最明显的特点是该解具有与Mises准则几乎相同精度的求解结果.

关键词: MY准则, 爆破压力, X80钢管线, 屈强比, 硬化指数

Abstract: With MY (mean yield) criterion in plastic limit analysis, the burst pressure of a defect-free line pipe was analyzed to obtain an analytical solution. The burst pressure of rolled X80 steel was calculated by this method and compared with those based on Tresca, Mises and TSS yield criteria. The results showed that the burst pressure is a function of the strain hardening exponent n depending on the yield-to-tensile strength ratio ReL/Rm, the original pipe geometry t0/D0 as well as the ultimate tensile strength. The burst pressure decreases with the increase of the strain hardening exponent and increases with the increase of the ratio of thick to diameter and tensile strength. It is also concluded that Tresca criterion predicts a lower bound to the burst pressure, while TSS criterion predicts an upper bound one. However, the burst pressure on the MY criterion lies just between the TSS and Tresca solutions, and the MY criterion almost has the same precision with the Mises solution.

中图分类号: