Results 71 to 80 of about 1,269 (188)

Microstructural model for shear strain localization and occurrence of adiabatic shear band at high strain rates

open access: yes, 2009
The occurrence of adiabatic shear bands during high strain rate deformation of metals has been analyzed using a finite element approach. It was found that these bands occur at inhomogeneities in the microstructure and result from the competing processes ...
M.N. Bassim   +3 more
core   +1 more source

Characterization of thermo-mechanical behavior and adiabatic shear band formation in a press- hardened 22MnB5 steel at different strain rates

open access: yes
Adiabatic Shear Band formation is observed in high-speed shear deformation of metallic materials, particularly in technologically relevant processes. It is characterized by the formation of increasingly localized areas of high shear strains.
Wagner, M. F.-X.   +2 more
core   +1 more source

A new perspective on adiabatic shear failure

open access: yes, 2009
Adiabatic shear failure is commonly considered to be induced by thermal softening, for which a critical strain describes the onset of failure. This paper revisits this concept on the basis of experimental evidence showing that the homogeneous temperature
D. Rittel
core   +1 more source

Some experiments on adiabatic shear failure

open access: yes, 2006
Dynamic testing of statically pre-deformed specimens of Ti6Al4V shows that the total strain to failure increases with the level of pre-strain. Furthermore, interrupted and various other dynamic tests on Ti6AL4V show that the temperature rise prior to ...
M. Merzer, D. Rittel, Z.G. Wang
core   +1 more source

Adiabatic Shear banding in Titanium 15-3-3-3 Alloy [PDF]

open access: yes, 2013
Shear stresses are a common reason for failure in many industrial applications. Localized shear deformations in certain materials can lead to the formation of adiabatic shear bands.
Akbari, Azin
core  

Research on Adiabatic Shear during Serrated Chip Formation of High Speed Turning of Hardened Steel

open access: yes, 2010
The development of chip morphology, critical cutting condition of adiabatic shear during serrated chip formation and cutting forces were observed and measured by high speed turning experiment for 30CrNi3MoV hardened steel.
Hai Yang Yu   +4 more
core   +1 more source

Analysis of Adiabatic Shear Band Formation by an Explicit Elasto-Plastic Finite Element Method

open access: yes, 1999
This paper is concerned with the shear band formation in sheet metal under dynamic loading. The shear band propagation is analyzed by an explicit elasto-plastic finite element code, which adopts the Johnson-Cook model to consider the effect of strain ...
조상순, 강우종, 허훈
core  

Effect of high strain rate on adiabatic shear susceptibility and microstructures in Al0.4CoCrFeNi high-entropy alloy

open access: yes
The effect of high strain rate on adiabatic shear susceptibility and microstructures in Al0.4CoCrFeNi high-entropy alloy (HEA) was examined using a split Hopkinson pressure bar (SHPB) and hat-shaped specimens. The results exhibit a clear strain-hardening
Junhua Cui   +7 more
core   +1 more source

Modelling of Adiabatic Shear Band and Microvoid induced Material Degradation

open access: yes, 2017
International audienceA phenomenon possibly leading to catastrophic failure of high strength materials like steel and titanium alloys during high strain rate loading is the adiabatic shear banding.
Longère, Patrice, Dorothy, H.L.
core  

ADIABATIC SHEAR LOCALIZATION IN AISI 1340 AND 4340 STEELS: THE INFLUENCE OF MICROSTRUCTURE AND GEOMETRY [PDF]

open access: yes, 2011
The mechanical behaviour of AISI 1340 and 4340 steel under high strain-rate loading in compression and in torsion were investigated using direct impact Hopkinson bar and torsion split Hopkinson bars. Both alloys contained 0.40 wt.
MOSTAGHIMI GHOMI, HOMA
core  

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