Yield surfaces of heterogeneous media with debonded inclusions
Abstract
Purpose
The purpose of this paper is to present knowledge in estimating yield surfaces of heterogeneous media by use of homogenization, especially where the macroscopic behaviour is driven by weak interfaces between phase constituents.
Design/methodology/approach
A computational homogenization procedure is used to determine the yield surface of a Representative Volume Element (RVE) that contains a fully debonded inclusion embedded within ideally plastic matrix, whereby the interface is modelled by a Coulomb type friction law.
Findings
The macroscopic behaviour of the RVE is shown to coincide an RVE with a hole for expanding loads, whereas for compressive loads, it was shown to approach an RVE with a fully bonded inclusion.
Originality/value
The present paper builds on Gurson’s work in estimating macroscopic yield surfaces of heterogeneous materials. The work is novel in the sense that there had been no previous publications discussing influence of weak interfaces on yield surfaces.
Keywords
Acknowledgements
This work is an extended and updated version of the previous publication (Perić et al., 2011a), funded by EPSRC of UK under Grant No. EP/D500281/1. This support is gratefully acknowledged.
Citation
Somer, D.D., Peric, D., de Souza Neto, E.A. and Dettmer, W.G. (2015), "Yield surfaces of heterogeneous media with debonded inclusions", Engineering Computations, Vol. 32 No. 6, pp. 1802-1813. https://doi.org/10.1108/EC-10-2014-0208
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited