Details
| Original language | English |
|---|---|
| Journal | Journal of the Mechanical Behavior of Materials |
| Volume | 27 |
| Issue number | 5-6 |
| Publication status | Published - 14 Dec 2018 |
| Externally published | Yes |
Abstract
Keywords
- damage, finite-element-method, isotropic hardening, mesh-independent, plasticity, rate-dependent, regularization, relaxation-based, viscosity
ASJC Scopus subject areas
- Materials Science(all)
- Materials Science (miscellaneous)
- Engineering(all)
- Mechanics of Materials
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In: Journal of the Mechanical Behavior of Materials, Vol. 27, No. 5-6, 14.12.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The effect of plasticity on damage evolution using a relaxation-based material model
AU - Schwarz, S.
AU - Hackl, K.
AU - Junker, Philipp
PY - 2018/12/14
Y1 - 2018/12/14
N2 - As damage occurs in the context of high stresses that are also related to the presence of plastic strains, it is natural to investigate the effect of plasticity on damage evolution and to thus achieve a more realistic model. In this work, the existing and new damage model presented in [Junker P, Schwarz S, Makowski J, Hackl K. Continuum Mech. Therm. 2017, 29 (1), 291–310] is enhanced with plasticity and isotropic hardening. The damage model is based on a relaxation-based approach and does not require additional complex regularization techniques besides considering viscous effects. The benefit of the model are mesh-independent results for the rate-dependent case, even without considering, e.g. gradient terms for mathematical regularization. The enhancement with plasticity and isotropic hardening was investigated for a representative volume element that considerd a damaging matrix material and non-damaging hard precipitates. Two different loading types, pure tension and pure shear, yielded the homogenized stress/strain response for the material at various loading rates. Hereto, several finite discretizations in terms of finite-element meshes were used. The results underline the mesh-independence for physically reasonable loading rates and viscosities.
AB - As damage occurs in the context of high stresses that are also related to the presence of plastic strains, it is natural to investigate the effect of plasticity on damage evolution and to thus achieve a more realistic model. In this work, the existing and new damage model presented in [Junker P, Schwarz S, Makowski J, Hackl K. Continuum Mech. Therm. 2017, 29 (1), 291–310] is enhanced with plasticity and isotropic hardening. The damage model is based on a relaxation-based approach and does not require additional complex regularization techniques besides considering viscous effects. The benefit of the model are mesh-independent results for the rate-dependent case, even without considering, e.g. gradient terms for mathematical regularization. The enhancement with plasticity and isotropic hardening was investigated for a representative volume element that considerd a damaging matrix material and non-damaging hard precipitates. Two different loading types, pure tension and pure shear, yielded the homogenized stress/strain response for the material at various loading rates. Hereto, several finite discretizations in terms of finite-element meshes were used. The results underline the mesh-independence for physically reasonable loading rates and viscosities.
KW - damage
KW - finite-element-method
KW - isotropic hardening
KW - mesh-independent
KW - plasticity
KW - rate-dependent
KW - regularization
KW - relaxation-based
KW - viscosity
UR - http://www.scopus.com/inward/record.url?scp=85058810108&partnerID=8YFLogxK
U2 - 10.1515/jmbm-2018-2001
DO - 10.1515/jmbm-2018-2001
M3 - Article
VL - 27
JO - Journal of the Mechanical Behavior of Materials
JF - Journal of the Mechanical Behavior of Materials
SN - 2191-0243
IS - 5-6
ER -