Ratcheting behavior of pressurized elbow pipe with local wall thinning

被引：49
|
作者：
Shi, Hongrui [1 ]
Chen, Gang [1 ]
Wang, Yong [1 ]
Chen, Xu [1 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
来源：
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2013年 / 102卷
基金：
国家高技术研究发展计划(863计划);
关键词：
Ratcheting; Elbow piping; Cyclic loading; Thinning wall; Kinematic hardening; KINEMATIC HARDENING RULES; CYCLIC STRAIN ACCUMULATION; PIPING ELBOWS; DYNAMIC RECOVERY; CRITICAL STATE; STEEL; SIMULATION; OHNO;
D O I：
10.1016/j.ijpvp.2012.12.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ratcheting deformation is studied on elbow pipe made of Z2CND18.12N stainless steel with local wall thinning subjected to constant internal pressure and reversed in-plane bending under load control. The local wall thinning is located at extrados and crown of elbow. It is shown that local wall thinning has a very pronounced effect on the ratcheting behavior of elbows, as compared to the ratcheting behavior of sound elbow specimen. Three-dimensional elastic-plastic analyses with ANSYS in which Chaboche and Chen-Jiao-Kim (CJK) kinematic hardening model are carried out to evaluate structural ratcheting behaviors. A reasonable agreement has been found between the experimental and the simulated results with CJK model for the ratcheting of the elbows. The ratcheting boundary is determined by evaluating variations in the plastic strain increment with CJK model. The effects of the depth and location of local wall thinning on the ratcheting response are discussed by CJK model. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 23
页数：10
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