An approximate yield criterion for anisotropic porous media Academic Article

abstract

• We derive a new yield function for materials containing spheroidal voids embedded in a perfectly-plastic anisotropic Hill-type matrix. Using approximate limit-analysis and a restricted set of trial velocity fields, analytical yield loci are derived for a hollow, spheroidal volume element containing a confocal spheroidal void. Alternatively, the yield loci are determined through numerical limit-analysis, i.e., employing a larger set of velocity fields. The numerical results are quasi-exact for transversely isotropic materials under axisymmetric loading. We show that an enhanced description of admissible microscopic deformation fields results in a close agreement between analytical and numerical macroscopic yield loci. To cite this article: S.M. Keralavarma, A.A. Benzerga, C. R. Mecanique 336 (2008). 2008 Acadmie des sciences.

authors

• Benzerga, Amine

published proceedings

• COMPTES RENDUS MECANIQUE

author list (cited authors)

• Keralavarma, S. M., & Benzerga, A. A.

citation count

• 42

complete list of authors

• Keralavarma, Shyam M||Benzerga, A Amine

publication date

• September 2008

publisher

• Elsevier  Publisher

published in

• Comptes Rendus - Mecanique  Journal

keywords

• Damage
• Ductile Metals
• Homogenization
• Micromechanics
• Non-spherical Voids
• Porous Media
• Void Growth

Digital Object Identifier (DOI)

• 10.1016/j.crme.2008.07.008

start page

• 685

end page

• 692

volume

• 336

issue

• 9

URL

• http://dx.doi.org/10.1016/j.crme.2008.07.008