Micromechanics-based constitutive relations for post-localization analysis. Academic Article

abstract

• Micromechanics-based constitutive relations for post-localization analysis are obtained, to be used in a multi-surface representation of porous metal plasticity. Each yield surface involves a number of internal parameters. Hence, the constitutive relations must be closed with evolution equations for the internal parameters. The latter are essential to describing the gradual loss of load-bearing capacity under shear-dominated loading. We also briefly discuss potential void closure due to void rotation and elongation in shear and show additional details regarding the simulations reported in a recent paper (A mechanism of failure in shear bands (2018) Extreme Mechanics Letters, 23, pp. 67-71.) The method can be more broadly used in a range of ductile failure problems involving combined tension and shear loadings.

authors

• Benzerga, Amine

published proceedings

• MethodsX

author list (cited authors)

• Torki, M. E., & Benzerga, A. A.

citation count

• 3

publication date

• January 2018

publisher

• Elsevier  Publisher

keywords

• Ductility
• Lode Angle
• Post-localization Analysis In Shear
• Triaxiality
• Void Coalescence
• Void Growth

Digital Object Identifier (DOI)

• 10.1016/j.mex.2018.10.018

start page

• 1431

end page

• 1439

volume

• 5

URL

• http://dx.doi.org/10.1016/j.mex.2018.10.018