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A platform for research: civil engineering, architecture and urbanism
Ratcheting evaluation of pressurized straight pipe using Ahmadzadeh–Varvani hardening rule
Abstract This study evaluates the Ahmadzadeh–Varvani (A-V) hardening rule for the ratcheting behavior of pressurized straight pipe made of austenitic stainless steel Z2CND18.12N under bending loading and vertical displacement control, respectively. Based on the quasi-three point bending apparatus, the straight pipe specimen is placed in a nearly horizontal position, and the applied displacement to the specimen achieves cyclic bending. The displacement is called as vertical displacement in this study. Firstly, the A-V model is implemented into ABAQUS with the radial return scheme with sub-increments; and the consistent tangent modulus is derived for A-V model, and gives quadratic convergence for the solution. And then the numerical calculation is developed to simulate ratcheting behavior of pressurized straight pipe. The influences of internal pressure, cyclic bending loading or cyclic vertical displacement, loading history and control modes on ratcheting strain of straight pipe are studied, respectively. By comparison with the experimental data, it is found that the predicted results of A-V model are in good agreement with the experimental data of pressurized straight pipe.
Highlights A-V kinematic hardening rule is implemented into ABAQUS with Umat. Ratcheting behavior of pressurized straight pipe is studied under bending and displacement. Influence of different factors on ratcheting behavior of pressurized straight pipe is studied.
Ratcheting evaluation of pressurized straight pipe using Ahmadzadeh–Varvani hardening rule
Abstract This study evaluates the Ahmadzadeh–Varvani (A-V) hardening rule for the ratcheting behavior of pressurized straight pipe made of austenitic stainless steel Z2CND18.12N under bending loading and vertical displacement control, respectively. Based on the quasi-three point bending apparatus, the straight pipe specimen is placed in a nearly horizontal position, and the applied displacement to the specimen achieves cyclic bending. The displacement is called as vertical displacement in this study. Firstly, the A-V model is implemented into ABAQUS with the radial return scheme with sub-increments; and the consistent tangent modulus is derived for A-V model, and gives quadratic convergence for the solution. And then the numerical calculation is developed to simulate ratcheting behavior of pressurized straight pipe. The influences of internal pressure, cyclic bending loading or cyclic vertical displacement, loading history and control modes on ratcheting strain of straight pipe are studied, respectively. By comparison with the experimental data, it is found that the predicted results of A-V model are in good agreement with the experimental data of pressurized straight pipe.
Highlights A-V kinematic hardening rule is implemented into ABAQUS with Umat. Ratcheting behavior of pressurized straight pipe is studied under bending and displacement. Influence of different factors on ratcheting behavior of pressurized straight pipe is studied.
Ratcheting evaluation of pressurized straight pipe using Ahmadzadeh–Varvani hardening rule
Chen, Xiaohui (author) / Tian, Yusong (author) / Liu, Shiji (author) / Lang, Lang (author) / Zhu, Lin (author)
Thin-Walled Structures ; 179
2022-06-21
Article (Journal)
Electronic Resource
English
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