Shear Band Formation in Triaxial and Plane Strain Tests

2009 ◽  
pp. 604-604-24 ◽  
Author(s):  
JF Peters ◽  
PV Lade ◽  
A Bro
Keyword(s):  
Shear Band ◽  
Plane Strain ◽  
Shear Band Formation ◽  
Band Formation

Effects of Crystallographic Texture on Plastic Flow Localization

2007 ◽  
Vol 340-341 ◽  
pp. 211-216
Author(s):  
Mitsutoshi Kuroda
Keyword(s):  
Shear Band ◽  
Plane Strain ◽  
Plastic Flow ◽  
Texture Component ◽  
Three Dimensional ◽  
Cube Texture ◽  
Shear Band Formation ◽  
Flow Localization ◽  
Band Formation ◽  
Plastic Flow Localization

In this study, effects of typical texture components observed in rolled aluminum alloy sheets (i.e. Copper, Brass, S, Cube and Goss texture components) on plastic flow localization are studied. The material response is described by a generalized Taylor-type polycrystal model, in which each grain is characterized in terms of an elastic-viscoplastic continuum slip constitutive relation. First, forming limits of thin sheet set by sheet necking are predicted using a Marciniak–Kuczynski (M–K-) type approach. It is shown that only the Cube texture component yields forming limits higher than that for a random texture in the biaxial stretch range. Next, three-dimensional shear band analyses are performed, using a three-dimensional version of M–K-type model, but the overall deformation mode is restricted to a plane strain state. From this simple model analysis, two important quantities regarding shear band formation are obtained: i.e. the critical strain at the onset of shear banding and the corresponding orientation of shear band. It is concluded that the Cube texture component is said to be a shear band free texture, while some texture components exhibit significantly low resistance to shear band formation. Finally, shear band developments in plane strain pure bending of sheet specimens with the typical textures are studied.

scholarly journals Dislocations and inclusions in prestressed metals

2013 ◽  
Vol 469 (2154) ◽  
pp. 20120752 ◽  
Author(s):  
Luca Argani ◽  
Davide Bigoni ◽  
Gennady Mishuris
Keyword(s):  
Shear Band ◽  
Constitutive Model ◽  
Plane Strain ◽  
Deformation Theory ◽  
Shear Band Formation ◽  
Dislocation Dipole ◽  
Elastic Solids ◽  
Band Formation ◽  
Ductile Metals ◽  
Nonlinear Elastic

The effect of prestress on dislocation (and inclusion) fields in nonlinear elastic solids is analysed by extending previous solutions by Eshelby and Willis. Using a plane-strain constitutive model (for incompressible incremental nonlinear elasticity) to describe the behaviour of ductile metals ( J 2 -deformation theory of plasticity), we show that when the level of prestress is high enough that shear band formation is approached, strongly localized strain patterns emerge, when a dislocation dipole is emitted by a source. These may explain cascade activation of dislocation clustering along slip band directions.

Shear band formation in plane strain compression

1988 ◽  
Vol 36 (9) ◽  
pp. 2435-2480 ◽  
Author(s):  
S.V. Harren ◽  
H.E. Dève ◽  
R.J. Asaro
Keyword(s):  
Shear Band ◽  
Plane Strain ◽  
Plane Strain Compression ◽  
Shear Band Formation ◽  
Band Formation

Mechanism of macroscopic shear band formation in plane strain compressed fine-grained aluminium

2015 ◽  
Vol 642 ◽  
pp. 167-180 ◽  
Author(s):  
H. Paul ◽  
J.H. Driver ◽  
A. Tarasek ◽  
W. Wajda ◽  
M.M. Miszczyk
Keyword(s):  
Shear Band ◽  
Plane Strain ◽  
Shear Band Formation ◽  
Band Formation ◽  
Fine Grained
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