Results 21 to 30 of about 1,342 (207)

Thermomechanical Variational Principles for Dissipative Materials with Application to Strain Localization in Bulk Metallic Glasses [PDF]

open access: yes, 2004
This thesis is concerned with variational principles for general coupled thermomechanical problems in dissipative materials including finite elastic and plastic deformation, non-Newtonian viscosity, rate sensitivity, arbitrary flow and hardening rule, as
Yang, Qiang
core   +1 more source

Annealing effect on the evolution of adiabatic shear band under dynamic shear loading in ultra-fine-grained iron [PDF]

open access: yes, 2012
In the present study, evolution of adiabatic shear band (ASB) and annealing effect on the evolution of ASB in ultra-fine-grained (UFG) Fe under dynamic shear loading were investigated. The UFG Fe was processed by equal-channel angular pressing (ECAP) via
Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.   +4 more
core   +1 more source

Research on dynamic mechanical properties and plastic constitutive relation of Ti3Al intermetallic compounds under mechanical-thermal coupling

open access: yesJournal of Materials Research and Technology, 2022
Ti3Al intermetallic compounds is a lightweight, high-temperature resistant rare aerospace materials, whose dynamic mechanical properties concern the accuracy of simulation analysis and further development in material manufacturing.
Zongxia Fu   +5 more
doaj   +1 more source

Effect of Particle Size on the Formation of Adiabatic Shear Band In Particle Reinforced Metal Matrix Composites [PDF]

open access: yes, 2004
In this paper, the effect of particle size on the formation of adiabatic shear band in 2024 All matrix composites reinforced with 15% volume fraction of 3.5, 10 and 20 mum SiC particles was investigated by making use of split Hopkinson pressure bar (SHPB)
Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.   +3 more
core   +1 more source

Experimental method for the evaluation of the susceptibility of materials to shear band formation

open access: yesEPJ Web of Conferences, 2012
In order to characterize materials with respect to their susceptibility to shear band formation at high strain rates, a modified Hopkinson pressure bar apparatus and hat-shaped steel specimens with a shear zone having a width significantly larger than ...
Tham R.
doaj   +1 more source

Simulation of Adiabatic Shear Bands in Orthogonal Machining of Ti6Al4V Using a Rigid-Viscoplastic Finite Element Analysis

open access: yesMetals, 2020
Catastrophic shear instability is the dominant mechanism during orthogonal cutting of Ti6Al4V. Chip segmentation even at low speeds testifies to the emergence of some kind of instability during plastic deformation of the material.
Orestis Friderikos   +3 more
doaj   +1 more source

A Review on the Adiabatic Shear Banding Mechanism in Metals and Alloys Considering Microstructural Characteristics, Morphology and Fracture

open access: yesMetals, 2023
The current review work studies the adiabatic shear banding (ASB) mechanism in metals and alloys, focusing on its microstructural characteristics, dominant evolution mechanisms and final fracture.
Konstantina D. Karantza   +1 more
doaj   +1 more source

Modeling periodic adiabatic shear band evolution during high speed machining Ti-6Al-4V alloy [PDF]

open access: yes, 2013
Cutting experiments were performed on Ti-6Al-4V alloy over a wide range of cutting speeds. The transition of chip morphology from continuous to serrated is observed with increasing the cutting speeds, which is found to be ascribed to a periodic shear ...
仝兴华   +5 more
core   +1 more source

The modified temperature term on Johnson-Cook constitutive model of AZ31 magnesium alloy with {0002} texture

open access: yesJournal of Magnesium and Alloys, 2020
The dynamic compression experiments with Split-Hopkinson Pressure Bar(SHPB) were performed on AZ31 magnesium alloy rolled sheet specimens in the normal direction (AZ31-ND) with {0002} texture at the temperature of 293–523 K and the strain rate of 0.001 ...
Feng Zhang   +7 more
doaj   +1 more source

Suppression of repeated adiabatic shear banding by dynamic large strain extrusion machining [PDF]

open access: yes, 2014
High speed machining (HSM) is an advanced production technology with great future potential. Chip serration or segmentation is a commonly observed phenomenon during high speed machining of metals, which is found to be ascribed to a repeated shear band ...
Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.   +2 more
core   +1 more source

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