Effects of porosity, profile of thickness, and angular acceleration on the magneto-electro-elastic behavior of a porous FGMEE rotating disc placed in a constant magnetic field

Saadatfar, M.; Zarandi, M. H.; Babaelahi, Mojtaba

doi:10.1177/0954406220938409

Cited by 13 publications

(6 citation statements)

References 48 publications

(82 reference statements)

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“…So, the radial and circumferential stress functions are more straightforward. All of the material constants, except Poisson's ratio, are supposed to change according to a power-law function as 38 :…”

Section: Stress Analysismentioning

confidence: 99%

See 1 more Smart Citation

New optimum configuration for the FGM rotating disc in gas turbines using combined thermal-mechanical analysis: An analytical approach

Babazadeh,

Babaelahi,

Saadatfar

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The gas turbine is one of the most suitable equipment for various applications. Usually, a gas turbine comprises a set of discs to maintain turbine blades. The rotating disc in gas turbines is one of the critical components affected by various thermal and mechanical loads. The current article considers a new rotating disc with variable thickness (power-law profile). The functionally graded material has been used as the disc material, and the disc’s properties vary with temperature and location. Therefore, the mechanical and thermal behaviours of the disc are a function of temperature and location. The differential energy balance equation has been derived for analysing the new disc. In the performed analysis, the conduction and convection heat transfer coefficients vary with temperature and location; thus, the derived final heat transfer equation has high nonlinearity. One of the efficient expansion methods, the so-called Differential Transformation Method (DTM), is used for the governed equation’s analytical solution, and the numerical solution is used for validation. Then, the stress analysis is performed using analytical expressions according to the temperature profile. The impacts of geometrical and thermophysical characteristics on the temperature and stress distribution are evaluated using the analytical solution in the new disc. The comparison of displacement and stresses in the new FGM disc and old discs shows that the thermo-mechanical performance of the new proposed disc is improved significantly.

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Section: Stress Analysismentioning

confidence: 99%

“…Where G ¯ is the material constant. Finally, the equilibrium equation of the rotating FGM gas turbine disc can be investigated as 38 :…”

Section: Modellingmentioning

confidence: 99%

New optimum configuration for the FGM rotating disc in gas turbines using combined thermal-mechanical analysis: An analytical approach

Babazadeh,

Babaelahi,

Saadatfar

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…1 Functionally graded porous piezoelectric materials (FGPPMs) have various usages, such as in accelerometers, medical ultrasonic devices, underwater acoustics, low-frequency hydrophones, vibratory sensors, contact microphones, etc. (Saadatfar et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…vibration control, marine sonar, health monitoring, medical, and aerospace industries) (Kumar and Harsha, 2022c). Functionally graded piezoelectric materials (FGPMs), as a sort of functionally graded (FG) smart materials, are increasingly employed in various sectors due to their superior durability, performance, and reliability compared to homogeneous counterparts (Kumar and Harsha, 2022c; Saadatfar et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Asymmetric two-dimensional poroelastic analysis of heterogeneous smart discs considering hygrothermal loading

Eldeeb,

Shabana,

Guo

et al. 2024

Journal of Intelligent Material Systems and Structures

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The objective of this study is to examine through the finite element method the impacts of employing two-dimensional (2D) properties grading on the behaviors of piezoelectric sensors/actuators due to their significance. These structures are modeled as variable thickness discs and are assumed to be exposed to simultaneous asymmetric loading conditions (thermal, hygral, electrical, and mechanical loads). Results demonstrate that the 2D grading is superior compared to the conventional one-dimensional grading for reducing the von Mises stress. The reduction reached, for instance, 8.3% allowing further increase of loading and/or safety. Also, the change of the displacement is varied between −4.5% and 31% depending on the considered grading pattern, and thus can be controlled to a desired value which helps to improve the sensing and actuating functionality for certain requirements. The study also examines the effects of porosity, and the results are compared to nonporous discs. Reductions of the maximum compressive tangential stress and von Mises stress reached 79.75% and 33.6%, respectively at specific porosity distribution patterns and volume fractions. These findings have significant implications for the manufacturing of smart structures, enabling them to operate in severe working conditions with better sensing and actuating capabilities than previously possible.

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“…25–27 Most recently, Saddatfar et al. 28 presented a numerical solution for the analysis of a rotating porous functionally graded magneto-electro-elastic disk with non-uniform thickness and angular velocity subjected to Lorentz forces.…”

Section: Introductionmentioning

confidence: 99%

Design of a disk-mandrel assembly for achieving rotational autofrettage in the disk

Kamal

Dixit

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Rotational autofrettage is a recently proposed method to induce beneficial residual stresses in axisymmetric hollow cylindrical bodies. The feasibility of the process has been studied for both disks and cylinders used in many engineering applications. The earlier analyses of rotational autofrettage of disks are based on certain assumptions. One of the crucial assumptions is the free rotation of the disk. However, the free rotation of the disk is practically difficult. In practice, it is feasible to rotate the disk by shrink-fitting it over a solid cylindrical mandrel. In view of this, a design of a disk-mandrel assembly for achieving rotational autofrettage in disks is proposed in this article. The main aim of the design is to obtain appropriate values of the disk-mandrel interference and the rotational speed of the assembly to prevent the loss of contact of the disk with the mandrel during rotation. The critical speeds corresponding to the yield onset, contact separation and the full plastic deformation of the disk are obtained as a function of shrink interference. The safe operating design parameters can be decided by plotting the critical speeds with varying interference values. A detailed stress analysis during elastic-plastic loading of the assembly followed by the analysis of residual stresses in the assembly after unloading is presented. The analysis is based on the plane stress assumption, Tresca yield criterion and elastic unloading. The analysis is validated with a finite element method model in ABAQUS. The proposed design is illustrated through the numerical example of an ASTM A723 disk-mandrel assembly to achieve rotational autofrettage in the disk. With a small overstrain level of 17.5% in the disk, a large magnitude of compressive residual stress, viz., 0.52 times the yield stress, is induced.

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Effects of porosity, profile of thickness, and angular acceleration on the magneto-electro-elastic behavior of a porous FGMEE rotating disc placed in a constant magnetic field

Cited by 13 publications

References 48 publications

New optimum configuration for the FGM rotating disc in gas turbines using combined thermal-mechanical analysis: An analytical approach

New optimum configuration for the FGM rotating disc in gas turbines using combined thermal-mechanical analysis: An analytical approach

Asymmetric two-dimensional poroelastic analysis of heterogeneous smart discs considering hygrothermal loading

Design of a disk-mandrel assembly for achieving rotational autofrettage in the disk

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