Localized necking in a round tensile bar with HCP material considering tension-compression asymmetry in plastic flow
- Authors
- Yoon, Jonghun; Cazacu, Oana; Lee, Junghwan
- Issue Date
- Jan-2013
- Publisher
- Trans Tech Publications Ltd.
- Keywords
- Tension-compression asymmetry; Void growth; Void volume fraction; Round tensile bar; Necking
- Citation
- Key Engineering Materials, v.535-536, pp 164 - 167
- Pages
- 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- Key Engineering Materials
- Volume
- 535-536
- Start Page
- 164
- End Page
- 167
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/30922
- DOI
- 10.4028/www.scientific.net/KEM.535-536.164
- ISSN
- 1013-9826
1662-9795
- Abstract
- In spite of this progress in predicting ductile failure, the development of macroscopic yield criteria for describing damage evolution in HCP (hexagonal close-packed) materials remains a challenge. HCP materials display strength differential effects (i.e., different behavior in tension versus compression) in the plastic response due to twinning. Cazacu and Stewart [1] developed an analytic yield criterion for a porous material containing randomly distributed spherical voids in an isotropic, incompressible matrix that displays tension-compression asymmetry. The matrix material was taken to obey the isotropic form of the Cazacu et al. [2] yield criterion, which captures the tension-compression asymmetry of the matrix material. In this paper, finite element calculations of a round tensile bar are conducted with the material behavior described by the Cazacu and Stewart [1] yield criterion. The goal of these calculations is to investigate the effect of the tension-compression asymmetry on the necking induced by void evolution and propagation.
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