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A platform for research: civil engineering, architecture and urbanism
Ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading
Abstract The present paper is concerned with the analysis of the ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading. Understanding the behaviour of this kind of structure at different load levels is of critical importance in a range of engineering applications such as in the design of structural components of power and chemical reactors. Depending on the kinematic hardening, the pipe may exhibit a ratcheting behaviour in the circumferential direction, which leads to a progressive accumulation of deformation. Many different constitutive theories have been proposed to model the kinematic hardening under such kind of loading history. The present paper presents a simple local criterion to indicate whether or not the pipe may exhibit a progressive accumulation of deformation. Such criterion is independent of the choice of the evolution law adopted for the backstress tensor. As an example, a semi-analytic approach using a mixed nonlinear kinematic/isotropic hardening model is proposed to be used in a preliminary analysis of this kind of structure.
Highlights The ratcheting behaviour of pressurized pipes under cyclic axial loading is analysed. A simple theoretical analysis allows explaining this kind of phenomenon. A condition on the backstress tensor indicates whether or not ratcheting will occur. A manipulation of variables allows uncoupling the analysis in the hoop direction. Elasto-plastic constitutive equations with kinematic and isotropic hardening are used.
Ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading
Abstract The present paper is concerned with the analysis of the ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading. Understanding the behaviour of this kind of structure at different load levels is of critical importance in a range of engineering applications such as in the design of structural components of power and chemical reactors. Depending on the kinematic hardening, the pipe may exhibit a ratcheting behaviour in the circumferential direction, which leads to a progressive accumulation of deformation. Many different constitutive theories have been proposed to model the kinematic hardening under such kind of loading history. The present paper presents a simple local criterion to indicate whether or not the pipe may exhibit a progressive accumulation of deformation. Such criterion is independent of the choice of the evolution law adopted for the backstress tensor. As an example, a semi-analytic approach using a mixed nonlinear kinematic/isotropic hardening model is proposed to be used in a preliminary analysis of this kind of structure.
Highlights The ratcheting behaviour of pressurized pipes under cyclic axial loading is analysed. A simple theoretical analysis allows explaining this kind of phenomenon. A condition on the backstress tensor indicates whether or not ratcheting will occur. A manipulation of variables allows uncoupling the analysis in the hoop direction. Elasto-plastic constitutive equations with kinematic and isotropic hardening are used.
Ratcheting behaviour of elasto-plastic thin-walled pipes under internal pressure and subjected to cyclic axial loading
da Costa Mattos, Heraldo S. (author) / Peres, Jadyr M.A. (author) / Melo, Marco Antonio C. (author)
Thin-Walled Structures ; 93 ; 102-111
2015-03-11
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2008