Partner: Wojciech Sumelka


Recent publications
1.Sumelka W., Nowak M., Non-normality and induced plastic anisotropy under fractional plastic flow rule: a numerical study, INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, ISSN: 0363-9061, DOI: 10.1002/nag.2421, Vol.40, pp.651-675, 2016
Abstract:

In this paper, an implementation of fractional plastic flow rule in the framework of implicit and explicit procedures is under consideration. The fractional plastic flow rule is obtained from a generalisation of the classical plastic flow rule utilising fractional calculus. The key feature of this new concept is that in general, the non-associative flow is obtained without necessity of additional potential assumption. If needed, the model can cover the anisotropy induced by plastic deformation. Illustrative examples showing the unusual flexibility of this model are also presented.

Keywords:

non-normality of plastic flow, fractional calculus, return mapping algorithm

Affiliations:
Sumelka W.-other affiliation
Nowak M.-IPPT PAN
2.Glema A., Łodygowski T., Sumelka W., Perzyna P., Numerical Analysis of the Intrinsic Anisotropic Microdamage Evolution in Elasto-Viscoplastic Solids, INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, ISSN: 1056-7895, DOI: 10.1177/1056789508097543, Vol.18, No.3, pp.205-231, 2008
Abstract:

The objective of the present article is to show the formulation for elastic-viscoplastic material model accounting for intrinsic anisotropic microdamage. The strain-induced anisotropy is described by the evolution of the intrinsic microdamage process — defined by the second-order microdamage tensor. The first step of the possibility of identification procedure (calibration of parameters) are also accounted and illustrated by numerical examples.

Keywords:

microdamage, anisotropy

Affiliations:
Glema A.-other affiliation
Łodygowski T.-other affiliation
Sumelka W.-other affiliation
Perzyna P.-IPPT PAN