Anisotropy has effect on yield locus.
Anisotropy in sheet metals.
Anisotropic sheet metal introduction when a bar plate or sheet of metal is manufactured a number of working processes are involved that impart a crystallographic texture to the metal component.
The lankford coefficient also called lankford value r value or plastic strain ratio is a measure of the plastic anisotropy of a rolled sheet metal.
Another model for sheet metal forming proposed in vladimirov et al 2010 uses the standard multiplicative formulation with hyperelasticity and structural tensors to characterize anisotropy.
In these models it was assumed that the principal directions of orthotropy of the sheet metal remain orthogonal during deformation.
A number of case studies are presented relating to mechanical and.
Due to their crystallographic structure and the characteristics of the rolling process sheet metals generally exhibit a significant anisotropy of mechanical properties.
A flexible yield condition yld2000 2d is selected and material parameters are identified by using the strain field measurements on specimens with a varying cross section.
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This paper reviews the most recent models for description of the anisotropic plastic behavior and formability of sheet metals.
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Anisotropy in sheet metals.
The variation of their plastic behavior with direction is assessed by a quantity called lankford parameter or anisotropy coefficient 4 1.
Anisotropy is described by normal anisotropy planar anisotropy which is related with crystallographic textures in rolled sheets the texture is symmetrical around the normal sheet.
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Abstract and figures sources of anisotropy in metals are discusssed as well as ways of interpreting and modelling this behaviour.
The present work focuses on the identification of the planar anisotropy of sheet metals utilizing the femu approach.
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σy 3 changes independent of σy 1 2 yield stress in direction 1 2 respectively.
This scalar quantity is used extensively as an indicator of the formability of recrystallized low carbon steel sheets.
During rolling the sheet develops anisotropy both in the plane of the sheet called planer anisotropy as well in the thickness of sheet called anisotropy ratio.
