Indentation Response of Power and Sigmoid Functionally Graded PSZ/NiCrAlY Composites DOI
Mohamed A. Eltaher, A. Wagih

International Journal of Applied Mechanics, Journal Year: 2022, Volume and Issue: 14(04)

Published: April 28, 2022

Owing to their superior mechanical properties, functionally graded materials (FGMs) are currently applicable for many tribological systems, which increased the need a rapid prediction tool of hardness and wear behavior these materials. To this end, paper aims present empirical equations predict residual indentation deformation PSZ/NiCrAlY composite FGM that could give indication on material rates at different loads. The were derived two common gradient laws, power (P-FGM) sigmoid (S-FGM), based numerical results obtained validated with experimental in study. by simulating experiments using commercial finite element software considering all elastic plastic properties. influence index, law displacement force-indentation response, contact pressure distribution, stains, surface profile evolutions, deformations studied. showed force larger P-FGM than S-FGM indices. is indices due higher PSZ ceramic phase area S-FGM. was normalized respect its value pure matrix highlighted independence ratio load. Finally, index both functions.

Language: Английский

Functionally graded composite ceramics: design, manufacturing, properties and applications DOI
Yufeng Zheng, Jialin Sun, Wei Li

et al.

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101496 - 101496

Published: May 1, 2025

Language: Английский

Citations

0
Modeling and study of properties distribution in graded polymer materials DOI Creative Commons
К. A. Andrianova, I. N. Sidorov, Л. М. Амирова

et al.

Results in Engineering, Journal Year: 2023, Volume and Issue: 19, P. 101299 - 101299

Published: July 17, 2023

Functionally graded materials (FGMs), the composition and properties of which continuously vary in cross-section, are great interest for various applications today. This paper proposes an original method assessing distribution FGMs. Graded polymer were obtained based on poorly compatible epoxy oligomers (epoxy resin NPEL-128 triglycidyl phosphate (TGP)). A mathematical description separation process components showing incompatibility middle range concentrations was provided. At initial time after blending mixture two is emulsion. The gradient formed as a result spontaneous settling due to difference densities phases. As result, curing, material with formed. Elemental analysis showed that gradually increases from top bottom sample forming material. through-thickness distributions microhardness glass temperature determined. semi-empirical used determine modulus elasticity coefficient thermal expansion distribution. It shown temperature, increase samples. On contrary, decreases. Such variations over cross section explained by composition. data prove during NPEL-128/TGFT emulsion,

Language: Английский

Citations

7
Thermo-elastoplastic sliding frictional contact and wear analysis of FGM-coated half-planes DOI
Zhou Jialin, Fei Shen, S. El-Borgi

et al.

Acta Mechanica, Journal Year: 2024, Volume and Issue: 235(8), P. 4943 - 4960

Published: June 2, 2024

Language: Английский

Citations

2
Investigating Static Deflection of Non-Prismatic Axially Functionally Graded Beam DOI Creative Commons
Walaa Mohammed Hashim, Luay S. Al-Ansari, Mohanad Aljanabi

et al.

Material Design & Processing Communications, Journal Year: 2022, Volume and Issue: 2022, P. 1 - 12

Published: July 18, 2022

In this study, the static deflection of non-prismatic axial function graded tapered beam (A-FGB) under distribution load has been analyzed using ANSYS workbench (17.2). According to a power-law model, elastic modulus varies continuously in direction beam. Also, beam’s geometry, i.e., width, thickness, or both width and thickness beam, linearly with different values non-uniformity parameter (1, 0.5,0, −0.5, −0.75). The effects martial distribution, index, on for A-FGB boundary conditions, such free-clamped, clamped-free, simply-supported, are studied. This research deals functionally materials FGMs more than one aspect terms conditions; addition, it studies response (α); therefore, comprehensively results show that increase index causes decreasing dimensionless its rate change depends supporting types parameters. variation free-clamped function–graded gives significant decrease at parameter, whereas clamped-free parameter.

Language: Английский

Citations

11
Optimal material and geometry of 2D-FGM tapered microbeams under dynamic and static constraints DOI
Hitham M. Abo Bakr,

Rasha M. Abo-bakr,

Rabab A. Shanab

et al.

Mechanics Based Design of Structures and Machines, Journal Year: 2023, Volume and Issue: 52(8), P. 5227 - 5262

Published: Aug. 30, 2023

AbstractThe present work applies meta-heuristic multi-objective particle swarm optimization (MOPSO) and non-dominated sorting genetic algorithm (NSGA)-II algorithms to predict optimal shape material distribution of two-directional functionally graded tapered (2DFG-T) microbeams. The cross-section the microbeam changes linearly along its length in both height width directions. rates these are taken as geometric design variables. Rather than simple power law, two different trigonometric functions introduced provide various effective flexible 2D- distributions metal ceramic phases. Using Hamilton's principle, mathematical model is derived based on third order shear deformation theory (TSDT) modified couple stress (MCST). Developing a computationally efficient time saving semi-analytical approach, governing set variable-coefficients partial differential equations solved for frequency critical buckling under boundary conditions. Several constrained single- problems formulated determine geometry parameters 2DFG-T microbeams achieve maximization fundamental and/or load while minimizing structural mass. Various results demonstrate that including addition variables more economical profiles manufacture following can be exploited optimum FG microscale nanobeams their shapes distribution.Keywords: 2DFG microbeamsmaterial optimizationtapered beamsmulti-objective optimizationmaterial models Disclosure statementNo potential conflict interest was reported by authors.Correction StatementThis article has been corrected with minor changes. These do not impact academic content article.

Language: Английский

Citations

5
Investigations of Micro-Deformation in Monocrystalline Copper at Low Temperatures via Indentation DOI Creative Commons
Shunbo Wang, Dan Zhao,

Yihan Niu

et al.

Micromachines, Journal Year: 2022, Volume and Issue: 13(7), P. 1043 - 1043

Published: June 30, 2022

Indentation experiments on differently oriented faces of monocrystalline copper were conducted to investigate the micro-deformation process at temperatures ranging from room temperature 150 K. The morphologies and textures residual imprints observed using electron microscopy. Distinct slip bands inside K compared smooth surfaces temperature. Molecular dynamics simulations performed identify deformation beneath indentation region. results showed that plastic was inhibited with decreasing temperature, but elastic recovery during unloading enhanced, resulting in inner (ISBs) being observable imprints. performances these ISBs strongly associated angles between direction major could be considered microscopic forms aggregated geometrically necessary dislocations (GNDs). This work helped reveal mechanism indentations

Language: Английский

Citations

5
Indentation Response of Power and Sigmoid Functionally Graded PSZ/NiCrAlY Composites DOI
Mohamed A. Eltaher, A. Wagih

International Journal of Applied Mechanics, Journal Year: 2022, Volume and Issue: 14(04)

Published: April 28, 2022

Owing to their superior mechanical properties, functionally graded materials (FGMs) are currently applicable for many tribological systems, which increased the need a rapid prediction tool of hardness and wear behavior these materials. To this end, paper aims present empirical equations predict residual indentation deformation PSZ/NiCrAlY composite FGM that could give indication on material rates at different loads. The were derived two common gradient laws, power (P-FGM) sigmoid (S-FGM), based numerical results obtained validated with experimental in study. by simulating experiments using commercial finite element software considering all elastic plastic properties. influence index, law displacement force-indentation response, contact pressure distribution, stains, surface profile evolutions, deformations studied. showed force larger P-FGM than S-FGM indices. is indices due higher PSZ ceramic phase area S-FGM. was normalized respect its value pure matrix highlighted independence ratio load. Finally, index both functions.

Language: Английский

Citations

3