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Steel and Composite Structures Volume 20, Number 4, March20 2016 , pages 931-950 DOI: https://doi.org/10.12989/scs.2016.20.4.931 |
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Effect of local wall thinning on ratcheting behavior of pressurized 90° elbow pipe under reversed bending using finite element analysis |
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Xiaohui Chen and Xu Chen
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| Abstract | ||
| Ratcheting deformation of pressurized Z2CND18.12N stainless steel 90° elbow pipe with local wall thinning subjected to constant internal pressure and reversed bending was studied using finite element analysis. Chen-Jiao-Kim (CJK) kinematic hardening model, which was used to simulate ratcheting behavior of pressurized 90° elbow pipe with local wall thinning at extrados, flanks and intrados, was implemented into finite element software ANSYS. The local wall thinning was located at extrados, flanks and intrados of 90° elbow pipe, whose geometry was rectangular cross-section. The effect of depth, axial length and circumferential angle of local wall thinning at extrados, flanks and intrados on the ratcheting behaviors of 90° elbow pipe were studied in this paper. Threedimensional elastic-plastic analysis with Chen-Jiao-Kim (CJK) kinematic hardening model was carried out to evaluate structural ratcheting behaviors. The results indicated that ratcheting strain was generated mainly along the hoop direction, while axial ratcheting strain was relatively small. | ||
| Key Words | ||
| FEA; constitutive model; elbow pipe; ratcheting effect; local wall thinning; ANSYS | ||
| Address | ||
| (1) Xiaohui Chen: School of Control Engineering, Northeastern University, Qinhuangdao 066004, China; (2) Xiaohui Chen, Xu Chen: School of Chemical Engineering and Technology, Tianjin University, 300072, China. | ||