压力管道“先漏后破”评定的准则研究

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

Study on Criterion for Leak Before Break Assessment of Pressure Pipes

1. College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, 210009, China;
2. Nantong Vocational College, Nantong, Jiangsu, 226007, China

摘要: 以弹塑性断裂力学为基础,分别建立了轴向表面裂纹和周向表面裂纹韧带的极限失稳压力P_u和穿透裂纹的起裂压力P_c的表达式,提出了一种压力管道的“先漏后破”缺陷评定准则:即若管道表面裂纹韧带的极限失稳压力P_u低于相应穿透裂纹的起裂压力P_c,则管道会泄漏失效;若管道表面裂纹韧带的极限失稳压力P_u等于或大于相应穿透裂纹的起裂压力P_c,则管道会爆破失效。该准则得到了一些文献提供的试验数据的验证。
- “先漏后破”准则 /
- 压力管道 /
- 缺陷评定
Abstract: Based on the elasto-plastio fracture mechanics, this paper established the expression formulas of limit buckling pressure P_u on the ligament of axial and circumferential surface cracks and the initial pressure for the through cracks P_c. A new Leak Before Break （LBB） assessment criterion was put forward to predict the failure mode of pressure pipes, i.e., when P_u is less than P_c, the pipe will leak; when P_u is equal to or larger than P_c, the pipe will break, which is verified by the test data reported in literatures.
- Leak before break criterion /
- Pressure pipe /
- Defect assessment