Results 41 to 50 of about 1,616,723 (373)

Size effects and idealized dislocation microstructure at small scales: predictions of a phenomenological model of Mesoscopic Field Dislocation Mechanics: Part I

, 2005
A Phenomenological Mesoscopic Field Dislocation Mechanics (PMFDM) model is developed, extending continuum plasticity theory for studying initial-boundary value problems of small-scale plasticity.
Acharya, Amit, Roy, Anish
core   +1 more source

Limit, shakedown and ratchet analyses of defective pipeline under internal pressure and cyclic thermal loading [PDF]

, 2011
In this study, the limit load, shakedown and ratchet limit of a defective pipeline subjected to constant internal pressure and a cyclic thermal gradient are analyzed.
Chen, Haofeng, Chen, Haofeng, Chen, Weihang, Li, Tianbai, Ure, James   +4 more
core   +1 more source

Ductilizing Al-Mn strips via gradient texture

Materials Research Letters, 2023
Improved strength-ductility synergy is not uncommon among metallic materials with gradient structures of grains and twins. In this work, we report that the texture gradient innately created in Al-Mn strips by twin-roll casting is also capable of ...
Jie Kuang, Xiaolong Zhao, Xinpeng Du, Jinyu Zhang, Gang Liu, Jun Sun, Guangming Xu, Zhaodong Wang   +7 more
doaj   +1 more source

Dislocation plasticity in thin metal films [PDF]

, 2002
This article describes the current level of understanding of dislocation plasticity in thin films and small structures in which the film or structure dimension plays an important role. Experimental observations of the deformation behavior of thin films,
Arzt, E., Freund, L. B., Kraft, O., Phillips, R.   +3 more
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Interfaces within strain gradient plasticity: Theory and experiments [PDF]

Acta Materialia, 2006
In this paper, it is shown'that the occurrence of dislocation pileups across grain boundaries, as well as subsequent emission to the adjacent grains, is captured theoretically by gradient plasticity and confirmed experimentally by nanoindentation. From a theoretical point of view, this is accomplished (within a deformation theory framework applicable ...
Aifantis, K.E., Soer, W.A., de Hosson, J.T.M., Willis, J.R.   +3 more
openaire   +1 more source

Strain-Gradient Plasticity as the Γ-Limit of a Nonlinear Dislocation Energy with Mixed Growth [PDF]

SIAM Journal on Mathematical Analysis, 2018
In this paper, we derive by means of $\Gamma$-convergence a macroscopic strain-gradient plasticity theory from a semidiscrete model for edge dislocations in an infinite cylindrical crystal.
Janusz Ginster
semanticscholar   +1 more source

HOMOGENIZATION IN GRADIENT PLASTICITY

Mathematical Models and Methods in Applied Sciences, 2011
This paper yields a two-scale homogenization result for a rate-independent elasto-plastic system. The presented model is a generalization of the classical model of linearized elasto-plasticity with hardening, which is extended by a gradient term of the plastic variables.
openaire   +4 more sources

Gradient plasticity used for modeling extrinsic and intrinsic size effects in the torsion of Au microwires

Journal of the Mechanical Behavior of Materials, 2016
The gradient plasticity theory proposed by Aifantis and coworkers has been successfully used to model size effect phenomena at the microscale and nanoscale, by introducing into the formulation an internal length scale associated with the phenomenological
Wei Xiaokun, Konstantinidis Avraam, Qi Chengzhi, Aifantis Elias   +3 more
doaj   +1 more source

Microstructure Evolution and Mechanical Properties of Austenite Stainless Steel with Gradient Twinned Structure by Surface Mechanical Attrition Treatment

Nanomaterials, 2021
Gradient structures in engineering materials produce an impressive synergy of strength and plasticity, thereafter, have recently attracted extensive attention in the material families.
Aiying Chen, Chen Wang, Jungan Jiang, Haihui Ruan, Jian Lu   +4 more
doaj   +1 more source

Void growth in high strength aluminium alloy single crystals : a CPFEM based study [PDF]

, 2017
The author thankfully acknowledges the financial support of EPSRC funding (EP/L021714/1).Peer ...
Asim, Umair, Demiral, Murat, Siddiq, M. Amir   +2 more
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