Axisymmetric yielding of functionally graded spherical vessel under thermo-mechanical loading

Sadeghian, Mojtaba; Toussi, Hamid Ekhteraei

doi:10.1016/j.commatsci.2010.10.036

Cited by 32 publications

(16 citation statements)

References 19 publications

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“…linear and exponential. Sadeghian and Toussi [17] studied the thermo-elasto-plastic analysis of a FGM spherical vessel under thermal and mechanical loading conditions. In this paper, they considered power law variation for variation of material properties including both mechanical and thermal characteristics while Poisson's ratio was assumed constant through the thickness.…”

Section: Introductionmentioning

confidence: 99%

Elastic analysis of thick-walled pressurized spherical vessels coated with functionally graded materials

2014

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In recent years, functionally graded material (FGM) has been widely explored in coating technology amongst both academic and industry communities. FGM coatings are suitable substitutes for many typical conventional coatings which are susceptible to cracking, debonding and eventual functional failure due to the mismatch of material properties at the coating/substrate interface. In this study, a thick spherical pressure vessel with an inner FGM coating subjected to internal and external hydrostatic pressure is analyzed within the context of three-dimensional elasticity theory. Young’s modulus of the coating is assumed to vary linearly or exponentially through the thickness, while Poisson’s ratio is considered as constant. A comparative numerical study of FGM versus homogeneous coating is conducted for the case of vessel under internal pressure, and the dependence of stress and displacement fields on the type of coating is examined and discussed

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Section: Introductionmentioning

confidence: 99%

Elastic analysis of thick-walled pressurized spherical vessels coated with functionally graded materials

2014

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“…However, the linear function assumption is not sufficient for describing more complicated cases. To capture Young's modulus and thermal expansion coefficient of the FGM thick-walled tube more precisely, some researchers [10][11][12][13][14][15][16][17][18][19][20][21][22] proposed another assumption of Young's modulus such as the form of E(r ) = E 0 r m 1 (E 0 and m 1 are material constants, r is the radial coordinate of the cylinder) and thermal expansion coefficient such as the form of α(r ) = α 0 r m 2 (α 0 and m 2 are material constants). For convenience, thermal conductivity and density of the FGM tube were mostly assumed as the form k(r ) = k 0 r m 3 (k 0 and m 3 are material constants) and ρ(r ) = ρ 0 r m 4 (ρ 0 and m 4 are material constants), respectively.…”

Section: Introductionmentioning

confidence: 99%

Thermoelastic Analysis of a Functionally Graded Rotating Thick-Walled Tube Subjected to Mechanical and Thermal Loads

Xin

Yang

et al. 2015

Int J Thermophys

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A thermoelastic solution for the functionally graded rotating thick-walled tube subjected to axisymmetric mechanical and thermal loads is given in terms of volume fractions of constituents. We assume that the tube consists of two linear elastic constituents and the volume fraction of one phase is a power function varied in the radial direction. By using the assumption of a uniform strain field within the representative volume element, the theoretical solutions of the displacement and the stresses are presented. Based on the relation of the volume average stresses of constituents and the macroscopic stresses of the composite material in micromechanics, the present method can avoid the assumption of the distribution regularities of unknown overall material parameters appeared in existing papers, such as Young's modulus, thermal expansion coefficient, thermal conductivity, and density. The effects of the angular velocity, the volume fraction, the ratio of two thermal expansion coefficients, the ratio of two thermal conductivities, and the ratio of two densities on the displacement and stresses are systematically studied, which should help structural engineers and material scientists optimally design thick-walled tube comprised inhomogeneous materials.

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“…Sadeghian and Ekhteraei (2011) studied the thermal stress analysis for an FGM spherical pressure vessel made of elastic-perfectly plastic and power law material model. Similar FGM cylindrical and spherical vessels, much of the studies on FGM rotating disk has been carried out numerically (Durodola and Attia, 2000;Bayat et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Elasto-Plastic Stress Analysis in Rotating Disks and Pressure Vessels Made of Functionally Graded Materials

Kalali

Moud

Hassani

2016

Lat. Am. j. solids struct.

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A new elastio-plastic stress solution in axisymmetric problems (rotating disk, cylindrical and spherical vessel) is presented. The rotating disk (cylindrical and spherical vessel) was made of a ceramic/metal functionally graded material, i.e. a particlereinforced composite. It was assumed that the material's plastic deformation follows an isotropic strain-hardening rule based on the von-Mises yield criterion. The mechanical properties of the graded material were modeled by the modified rule of mixtures. By assuming small strains, Hencky's stress-strain relation was used to obtain the governing differential equations for the plastic region. A numerical method for solving those differential equations was then proposed that enabled the prediction of stress state within the structure. Selected finite element results were also presented to establish supporting evidence for the validation of the proposed approach.

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Axisymmetric yielding of functionally graded spherical vessel under thermo-mechanical loading

Cited by 32 publications

References 19 publications

Elastic analysis of thick-walled pressurized spherical vessels coated with functionally graded materials

Elastic analysis of thick-walled pressurized spherical vessels coated with functionally graded materials

Thermoelastic Analysis of a Functionally Graded Rotating Thick-Walled Tube Subjected to Mechanical and Thermal Loads

Elasto-Plastic Stress Analysis in Rotating Disks and Pressure Vessels Made of Functionally Graded Materials

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