Ratcheting Behavior of Pressurized Elbow Pipe under Different Loading Modes

Ratcheting Behavior of Pressurized Elbow Pipe under Different Loading Modes
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不同加载方式下承压弯头管的棘轮行为

DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Xu Chen
Xu Chen
中科院分区：
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文献类型：
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作者：
W. Qu;Xu Chen

文献摘要

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利用有限元软件对Z2CND18.12N材质弯管的棘轮变形进行了研究。利用ANSYS进行了仿真分析。在ANSYS中加入了陈教金（CJK）随动强化模型进行研究。手肘承受内压和反向面内弯曲。内部压力可以是恒定的或循环的。在研究中使用了许多不同的加载路径。研究了不同加载方式下的棘轮变形。结果表明，棘轮变形主要发生在周向。弯管内拱顶处的应力较大，棘轮变形更为显著。拉、压载荷会影响危险点的位置。研究发现，在相同峰值载荷下，不同路径下的棘轮变形是不同的。
Ratcheting deformation is studied on elbow pipe made of Z2CND18.12N by FEM software. The simulation is conducted by ANSYS. Chen-Jiao-Kim (CJK) kinematic hardening model is added in ANSYS for the study. The elbow pipe is subjected to internal pressure and reversed in-plane bending. Internal pressure can be constant or cyclic. Many different loading paths are used in the study. Ratcheting deformations of under different ways are studied. The result shows that ratcheting deformation occurs mainly in the circumferential direction. Ratcheting deformation at the crown and intrados of elbow pipe is more notable because of higher stress. Tensile or compressed load can influence the position of dangerous point. It is found that ratcheting deformations under different paths with same peak load are different.