Zobrazeno 1 - 10 of 66 pro vyhledávání: '"Ahmad Assempour"'
1
Akademický článek
Investigation the behavior of different fullerenes on graphene surface
Autor: Mohammad Ali Bakhtiari, Mohammad Fathi, Fatemeh Abdolmohammadi, Seyed Mohammad Ali Hoseinian, Siavash Sepahi, Pooya Hooshyar, Mohammad Taghi Ahmadian, Ahmad Assempour
Publikováno v: Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract In the present study, the regime of motion of fullerene molecules on graphene substrate in a specific temperature range is investigated. The potential energy of fullerene molecules is analyzed using classical molecular dynamics methods. Full
Externí odkaz: https://doaj.org/article/ded347323ea0482db7a95e256cb47969
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2
Akademický článek
Enhancing mechanical properties in Mg microtubes using tubular channel angular pressing-extrusion (TCAPE): A promising severe plastic deformation method
Autor: Mohsen Kamran Masouleh, Amin Mirzakhani, Ahmad Assempour
Publikováno v: Journal of Materials Research and Technology, Vol 30, Iss , Pp 2826-2832 (2024)
In this study, a novel method, Tubular Channel Angular Pressing-Extrusion (TCAPE), is introduced for manufacturing ultrafine microtubes. This method, integrating Tubular Channel Angular Pressing (TCAP) and microtube extrusion (MTE) processes, reduces
Externí odkaz: https://doaj.org/article/3d86ea02f48b4c52bf56adea8b88131c
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3
Akademický článek
Cyclic contraction-expansion extrusion (CCEE): An innovate severe plastic deformation method for tailoring the microstructure and mechanical properties of magnesium AZ91 alloy
Autor: Kiarash Mashoufi, Peiman Garmroodi, Amin Mirzakhani, Ahmad Assempour
Publikováno v: Journal of Materials Research and Technology, Vol 26, Iss , Pp 8541-8554 (2023)
In this study, the Cyclic Contraction-Expansion Extrusion (CCEE) process, a novel severe plastic deformation (SPD) technique, is applied to the AZ91 magnesium alloy to enhance its mechanical properties through microstructural refinement. The CCEE met
Externí odkaz: https://doaj.org/article/cfb14797aa2447e1a557051ebdf4fdd0
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4
Akademický článek
The effects of microstructural parameters on the tension-compression mechanical behavior of extruded Mg-XY rods using crystal plasticity finite element modeling
Autor: Amin Mirzakhani, Ahmad Assempour
Publikováno v: Results in Engineering, Vol 17, Iss , Pp 100834- (2023)
In the present study, the effects of rare earth element Y, texture intensity, and grain size on the tension-compression mechanical behavior of extruded Mg-XY(X = 0–3, wt pct) rods were investigated using improved phenomenological crystal plasticity
Externí odkaz: https://doaj.org/article/69758d27e11c4472a12c15d2330509e1
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5
A micro mechanical study on tensile behavior of steel sheets with spheroidal cementite using crystal plasticity finite element method
Autor: Mona Einolghozati, Ahmad Assempour
Publikováno v: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. 236:2357-2371
In this research, we investigate the effects of various microstructural features on the behavior of spherical steel sheets, using the crystal plasticity finite element method. The cementite phase ratio, the grain sizes of ferrite and cementite, and t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c41182036481b64dfe906b581d67e43
https://doi.org/10.1177/14644207221078990
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8
Optimum design of middle stage tool geometry and addendum surfaces in sheet metal stamping processes using a new isogeometric-based framework
Autor: Mehdi Bostan Shirin, Ahmad Assempour, Mansoor Shamloofard, Amir Reza Isazadeh
Publikováno v: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 236:741-757
An efficient isogeometric-based framework is presented to integrate optimum design and formability analysis of sheet metal forming processes. To assess the quality of the formed parts, several objective functions such as fracture, wrinkling, thicknes
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8910e57ca6f91f4e5cea4295a01cae9a
https://doi.org/10.1177/09544054211041046
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9
Coupled continuum damage mechanics and crystal plasticity model and its application in damage evolution in polycrystalline aggregates
Autor: Ahmad Assempour, Omid Amelirad
Publikováno v: Engineering with Computers. 38:2121-2135
In the present study, damage initiation and growth in a polycrystalline aggregate are investigated. In this regard, an anisotropic continuum damage mechanics coupled with rate-dependent crystal plasticity theory is employed. Using a thermodynamically
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c24be87a38b18d916a917988356de6f6
https://doi.org/10.1007/s00366-021-01346-2
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10
Some improvements on the one-step inverse isogeometric analysis by proposing a multi-step inverse isogeometric methodology in sheet metal stamping processes
Autor: Ahmad Assempour, Mansoor Shamloofard, Amir Reza Isazadeh
Publikováno v: Applied Mathematical Modelling. 91:476-492
Recently, isogeometric methodology has been successfully implemented in one-step inverse analysis of sheet metal stamping processes. However, these models are not capable of analyzing forming processes which require severe deformation and/or several
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1790388d03827fcded81f9c874a918da
https://doi.org/10.1016/j.apm.2020.09.032
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