Steady‐State Creep Analysis of Functionally Graded Rotating Cylinder

Mangal, S. K.; Kapoor, Nitin; Singh, Tejeet

doi:10.1111/str.12052

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Mangal et al 36 who studied the steady-state creep analysis of FG rotating cylinders concluded that σ r , σ θ , σ a , and σ e in the cylinder are significantly affected by the presence of a particle gradient as well as by the presence of a particle and a thermal gradient. It was found that the creep rate was significantly reduced by the simultaneous presence of particle and thermal gradients which increased the lifetime of the cylinder.…”

Section: Introductionmentioning

confidence: 99%

Creep of autofrettaged thick-walled FGM cylindrical vessel

Abdolkhani

Hashemian

Aghadavoudi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this research work, the creep of thick-walled cylindrical vessels made of FGM with autofrettaged-treated was investigated using the analytical method. At different plastic depths and a variety of internal pressures for elastic modulus and yield stress constants ( n1 and n4), changes in residual creep strain rate (radial and circumferential) and final creep strain rate are investigated. The obtained results show that the circumferential stresses in the autofrettage have different values depending on the depth of the plastic. In the equivalent stress diagram, the resulting stress at the plastic points of the vessel reaches the yield stress of the FGM, and the stress decreases along the radius. If [Formula: see text] is increased from 1 to 1.8, the maximum creep strain rate decreases (for several n4, the dimensionless plastic depth is equal to 1.8). The results show that up to a dimensionless plastic depth of 1.5, the change in residual strain rate is negligible. The slope of the graphs for the dimensionless depths above 1.6 increases sharply. A comparison of the maximum circumferential stress as a function of plastic depth for the present work and the study by Darijani shows very good agreement between the two studies.

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Section: Introductionmentioning

confidence: 99%

Creep of autofrettaged thick-walled FGM cylindrical vessel

Abdolkhani

Hashemian

Aghadavoudi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…1–9 The use of FGMs in applications involving stringent thermo-mechanical loadings helps in reducing the stresses and deformations, which enhances the useful service life of engineering components. 2–4,6–14 It is possible due to flexibility of tailoring the distribution of reinforcement in a certain spatial direction in the FGM structures, so as to attain the desired variation of the required properties. 15…”

Section: Introductionmentioning

confidence: 99%

Influence of anisotropy on creep in functionally graded variable thickness rotating disc

Khanna

Gupta

Grover

2021

The Journal of Strain Analysis for Engineering Design

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The study is carried out to develop a mathematical model to analyze creep response of a varying thickness rotating disc made of anisotropic functionally graded 6061Al-SiCw.composite. The thickness and content of reinforcement (SiCw) in the disc are assumed to decrease radially according to power law. The yielding of disc material is according to Hill’s criterion and creeping as per threshold stress based law. The developed model is used to obtain the creep stresses and strain rates in the disc for various types of materials’ anisotropy. The stresses and strain rates are noticed to depend on the materials’ anisotropy. The study reveals that the presence of kind of anisotropy wherein the disc material exhibits lower yield strength toward the radial and tangential directions than the axial direction is beneficial in reducing the creep stresses and creep rates in the disc, in comparison to isotropic FGM disc. An anisotropic FG disc, which has highest and the lowest yield strengths, respectively, along the axial and radial directions shows superior creep response.

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Finite Element Analysis of Creep Crack Initiation in Functionally Graded Materials with Crack Parallel to the Gradient

Lai

Bai

Liu

2019

Int. J. Archit. Eng. Technol.

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With the advances in material synthesis technologies, functionally graded materials (FGMs) are developed to use in high temperature structurals due to the excellent high temperature mechanical properties. To facilitate wide use of FGMs in high temperature structures, finite element method (FEM) was used in this paper to investigate effects of creep resistant properties gradients on creep crack initiation (CCI) in FGMs, with crack parallel to the gradient. Results indicated that when creep resistant properties increased in the crack growth direction, CCI was retarded by creep properties gradients. However, CCI was accelerated by creep properties gradients when creep resistant properties decreased in the crack growth direction. CCI position occurred in the two symmetric slanted planes of the initial crack, regardless of the gradient variation of creep resistant properties.

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Steady‐State Creep Analysis of Functionally Graded Rotating Cylinder

Cited by 3 publications

References 20 publications

Creep of autofrettaged thick-walled FGM cylindrical vessel

Creep of autofrettaged thick-walled FGM cylindrical vessel

Influence of anisotropy on creep in functionally graded variable thickness rotating disc

Finite Element Analysis of Creep Crack Initiation in Functionally Graded Materials with Crack Parallel to the Gradient

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