Cyclic plastic and creep behaviour of pressure vessels under thermomechanical loading

Nayebi, A.; Abdi, R. El

doi:10.1016/s0927-0256(02)00218-5

Cited by 17 publications

(3 citation statements)

References 22 publications

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“…The operating lifetime of components subjected to cyclic thermal and mechanical loading is normally limited by the mechanisms of low-cycle fatigue, creep/fatigue interaction and excessive plastic deformation [1,2]. The evaluation of creep/fatigue interaction and other failure mechanisms of structures with variable repeated loading is a significant problem and has attracted the attentions of many researchers [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Chen

Ponter

2006

Int. J. Numer. Meth. Engng

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This paper extends the previous Linear Matching Method (LMM) to allow for the evaluation of plastic, creep and ratchet strains of structures subjected to a general load condition in a steady cyclic state. The constant and varying residual stress fields associated with differing mechanisms as well as the steady cyclic stress state of the whole component are obtained for further structural design and assessment. The total strain range for use in fatigue assessment, including the effects of creep and plastic strains are obtained. A typical example of 3D holed plate subjected to cyclic thermal load and constant mechanical load are assessed here in detail to verify the applicability of the proposed numerical technique. The LMM results in the paper are compared with those by ABAQUS step-bystep inelastic analyses and demonstrate that LMM have both the advantages of programming methods and the capacity to be implemented easily within a commercial finite element code, in this case, ABAQUS. The LMM provides a general-purpose technique for the evaluation of creep/ fatigue interaction

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Section: Introductionmentioning

confidence: 99%

Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Chen

Ponter

2006

Int. J. Numer. Meth. Engng

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“…A work was also published by Horgan and Chan [6] where it was noted that increasing the positive exponent of the radial coordinate provided a stress shielding effect, whereas decreasing it created stress amplification. Nayebi and Abdi [7] developed a numerical program to investigate the steady-state behavior of thick-walled spherical and cylindrical pressure vessels subjected to cyclic pressure and/or temperature using linear kinematic hardening in the plastic condition and a Norton power law in the creep condition. Geometric non-linearity and effect of coupling item for different thermal loading conditions were considered in the works of Reddy et al [8][9][10][11][12][13].…”

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confidence: 99%

Analytical and numerical analysis for the FGM thick sphere under combined pressure and temperature loading

2011

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Thermo-mechanical analysis of functionally graded hollow sphere subjected to mechanical loads and one-dimensional steady-state thermal stresses is carried out in this study. The material properties are assumed to vary non-linearly in the radial direction, and the Poisson's ratio is assumed constant. The temperature distribution is assumed to be a function of radius, with general thermal and mechanical boundary conditions on the inside and outside surfaces of the sphere. In the analysis presented here, the effect of non-homogeneity in FGM thick sphere was implemented by choosing a dimensionless parameter, named β i (i = 1, . . . , 3), which could be assigned an arbitrary value affecting the stresses in the sphere. It is observed that the solution process for β i (i = 3) = −1 are different from those obtained for other values of β i (i = 1, . . . , 3). Cases of pressure, temperature, and combined loadings were considered separately. It is concluded that by changing the value of β i (i = 1 . . . 3), the properties of FGM can be so modified that the lowest stress levels are reached. The present results agree well with existing results. Using FEM simulations, the analytical findings for FGM spheres under the influence of internal pressure and temperature gradient were compared to finite element results.

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“…Using the infinitesimal theory of elasticity, Eslami et al [5] obtained closed-form solutions for stress and displacement in a functionally graded thick sphere subjected to thermal and mechanical loads. Nayebi and Abdi [6] developed a numerical scheme to investigate the steady-state behavior of thick-walled spherical and cylindrical pressure vessels subjected to pressure and non-uniform temperature fields using linear kinematic hardening and Norton power law models in the plastic and creep regions, respectively. Dai et al [7] studied the magnetoelastic behavior of FGM cylindrical and spherical vessels subjected to an internal pressure and placed in a uniform magnetic field analytically.…”

Section: Introductionmentioning

confidence: 99%

Magnetothermoelastic stress and perturbation of magnetic field vector in a functionally graded hollow sphere

et al. 2009

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In this article, a closed-form solution for one-dimensional magnetothermoelastic problem in a functionally graded material (FGM) hollow sphere placed in uniform magnetic and temperature fields subjected to an internal pressure is obtained using the infinitesimal theory of magnetothermoelasticity. Hyper-geometric functions are employed to solve the governing equation. The material properties through the graded direction are assumed to be nonlinear with an exponential distribution. The nonhomogeneity of the material in the radial direction is assumed to be exponential. The temperature, displacement and stress fields and the perturbation of magnetic field vector are determined and compared with those of the homogeneous case. Hence, the effect of inhomogeneity on the stresses and the perturbation of magnetic field vector distribution are demonstrated. The results of this study are applicable for designing optimum FGM hollow spheres.

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Cyclic plastic and creep behaviour of pressure vessels under thermomechanical loading

Cited by 17 publications

References 22 publications

Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Linear matching method on the evaluation of plastic and creep behaviours for bodies subjected to cyclic thermal and mechanical loading

Analytical and numerical analysis for the FGM thick sphere under combined pressure and temperature loading

Magnetothermoelastic stress and perturbation of magnetic field vector in a functionally graded hollow sphere

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