Results 81 to 90 of about 235,245 (284)

Dissipative scale effects in strain-gradient plasticity: the case of simple shear

, 2015
We analyze dissipative scale effects within a one-dimensional theory, developed in [L. Anand et al. (2005) J. Mech. Phys. Solids 53], which describes plastic flow in a thin strip undergoing simple shear.
Chiricotto, Maria, Giacomelli, Lorenzo, Tomassetti, Giuseppe   +2 more
core   +1 more source

Identification of plastic constitutive parameters at large deformations from three dimensional displacement fields [PDF]

, 2012
The aim of this paper is to provide a general procedure to extract the constitutive parameters of a plasticity model starting from displacement measurements and using the Virtual Fields Method.
A Bertram, A Germaneau, A Gorry, A Savitzky, AJ Romano, AJ Romano, AP Karafillis, B Plunkett, BK Bay, C Franck, D Banabic, D Mohr, E Verhulp, F Barlat, F Barlat, F Latourte, F Pierron, F Pierron, FA Nichols, Fabrice Pierron, G Dhondt, G Losilla, GZ Voyiadjis, H Tao, H Vegter, HP Feigenbaum, J Kajberg, KS Zhang, M Brunet, M Darrieulat, M Gates, M Grédiac, M Grédiac, M Rossi, Marco Rossi, MHH Meuwissen, N Tvergaard, O Cazacu, OC Zienkiewicz, R Fletcher, R Hill, R Hill, R Mahnken, S Atay, S Avril, S Avril, S Avril, S Avril, S Avril, S Cooreman, S Roux, T Guélon, T Wierzbicki, TS Smith, V Laws, WT Lankford, Y Bai, Y Hwang, Y Ling, YM Hwang   +59 more
core   +5 more sources

Localization analysis of variationally based gradient plasticity model

, 2012
The paper presents analytical or semi-analytical solutions for the formation and evolution of localized plastic zone in a uniaxially loaded bar with variable cross-sectional area.
Aifantis, Borino, de Borst, Jan Zeman, Jirásek, Jirásek, Korenev, Liebe, Lubliner, Milan Jirásek, Mühlhaus, Olver, Ondřej Rokoš, Petryk, Polizzotto, Sneddon, Svedberg, Valanis   +17 more
core   +1 more source

Energetic Approach to Large Strain Gradient Crystal Plasticity

Acta Polytechnica, 2012
We formulate a problem of the evolution of elasto-plastic materials subjected to external loads in the framework of large deformations and multiplicative plasticity.
Jan Kratochvíl, Martin Kružík
doaj  

Assumed-strain finite element technique for accurate modelling of plasticity problems [PDF]

, 2013
In this work a linear hexahedral element based on an assumed-strain finite element technique is presented for the solution of plasticity problems. The element stems from the NICE formulation and its extensions.
Artioli, E., Castellazzi, G., Krysl, P.
core  

Strain-gradient effect on the crack tip dislocations density

Fracture and Structural Integrity, 2020
In this study, the influence of a material’s plastic properties on the crack tip fields and dislocation density behavior is analytically and numerically analyzed using the conventional mechanism-based strain-gradient plasticity (CMSGP) theory established
Valery Shlyannikov, Andrey Tumanov, Ruslan Khamidullin   +2 more
doaj   +3 more sources

Accurate Estimation of Brittle Fracture Toughness Deterioration in Steel Structures Subjected to Large Complicated Prestrains

Crystals, 2020
Studies have suggested that brittle fractures occur in steel because microcracks in the brittle layer at grain boundaries propagate as a result of the increase in piled-up dislocations. Therefore, prestraining can approach the limits of a material, which
Hiroaki Kosuge, Tomoya Kawabata, Taira Okita, Hidenori Nako   +3 more
doaj   +1 more source

Strain gradient visco-plasticity with dislocation densities contributing to the energy [PDF]

arXiv, 2017
We consider the energetic description of a visco-plastic evolution and derive an existence result. The energies are convex, but not necessarily quadratic. Our model is a strain gradient model in which the curl of the plastic strain contributes to the energy.
arxiv  

Continuum plasticity modelling of work hardening for precipitation-hardened martensitic steel guided by atom probe tomography

Materials & Design, 2022
An analytical flow stress model, based on isotropic strain gradient plasticity theory, for precipitation hardened materials, is proposed and evaluated against tensile data on a 15 wt% Cr - 5 wt% Ni (15-5) PH stainless steel. The 15-5 PH material was aged
Philip Croné, Tao Zhou, Peter Hedström, Joakim Odqvist, Peter Gudmundson, Jonas Faleskog   +5 more
doaj  

Dynamic Strength and Anisotropy of Dmls Manufactured Maraging Steel

Communications, 2019
This paper deals with maraging steel, as a prospective material for the 3D printed lightened structural parts of transport means. Direct Metal Laser Sintering technology was tested for creation of a thin-wall structure with defined internal geometry. The
Eva Schmidova, Premysl Hojka, Bohumil Culek, Filip Klejch, Michal Schmid   +4 more
doaj   +1 more source