A constitutive model for ductile damage evolution
Wallin, Mathias LU ; Ristinmaa, Matti LU
and Mattias, Olsson
(2011)
11th International Conference on Fracture and Damage Mechanics
452-453.
p.621-624
- Abstract
- A constitutive model for ductile porous material is formulated within the thermodynamic framework. A yield function based on the lower-bound solution for a cylindrical void model embedded in a plastic matrix is proposed. The new yield function is compared to the classical Gurson yield function using cell model calculations. The results reveal that the proposed yield function agreed well with the plastic region found from the cell model calculations. In addition to the influence of the void-volume ratio, the elastic part of the free energy is
dependent on a scalar damage field which allows the elasticity to be influenced by the void-volume fraction. The degradation is controlled by a scalar valued damage field and enters the... (More) - A constitutive model for ductile porous material is formulated within the thermodynamic framework. A yield function based on the lower-bound solution for a cylindrical void model embedded in a plastic matrix is proposed. The new yield function is compared to the classical Gurson yield function using cell model calculations. The results reveal that the proposed yield function agreed well with the plastic region found from the cell model calculations. In addition to the influence of the void-volume ratio, the elastic part of the free energy is
dependent on a scalar damage field which allows the elasticity to be influenced by the void-volume fraction. The degradation is controlled by a scalar valued damage field and enters the formulation via the Helmholtz's free energy. This dependence allows the elastic properties to naturally depend upon the damage accumulation. The numerical treatment of the model is derived and the capability of the model is demonstrated via numerical simulation of the necking of an axi-symmetric bar. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1653514
- author
- Wallin, Mathias
LU
; Ristinmaa, Matti
LU
and Mattias, Olsson
- organization
- publishing date
- 2011
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Key Engineering Materials
- volume
- 452-453
- pages
- 3 pages
- publisher
- Trans Tech Publications
- conference name
- 11th International Conference on Fracture and Damage Mechanics
- conference location
- Nagasaki, Japan
- conference dates
- 2010-09-22
- external identifiers
-
- wos:000287421700156
- scopus:78650734448
- ISSN
- 1013-9826
- DOI
- 10.4028/www.scientific.net/KEM.452-453.621
- language
- English
- LU publication?
- yes
- id
- f533911a-6ee6-491c-a30e-54488964a7f7 (old id 1653514)
- date added to LUP
- 2016-04-01 15:06:15
- date last changed
- 2022-01-28 04:32:06
@inproceedings{f533911a-6ee6-491c-a30e-54488964a7f7,
abstract = {{A constitutive model for ductile porous material is formulated within the thermodynamic framework. A yield function based on the lower-bound solution for a cylindrical void model embedded in a plastic matrix is proposed. The new yield function is compared to the classical Gurson yield function using cell model calculations. The results reveal that the proposed yield function agreed well with the plastic region found from the cell model calculations. In addition to the influence of the void-volume ratio, the elastic part of the free energy is<br/><br>
dependent on a scalar damage field which allows the elasticity to be influenced by the void-volume fraction. The degradation is controlled by a scalar valued damage field and enters the formulation via the Helmholtz's free energy. This dependence allows the elastic properties to naturally depend upon the damage accumulation. The numerical treatment of the model is derived and the capability of the model is demonstrated via numerical simulation of the necking of an axi-symmetric bar.}},
author = {{Wallin, Mathias and Ristinmaa, Matti and Mattias, Olsson}},
booktitle = {{Key Engineering Materials}},
issn = {{1013-9826}},
language = {{eng}},
pages = {{621--624}},
publisher = {{Trans Tech Publications}},
title = {{A constitutive model for ductile damage evolution}},
url = {{http://dx.doi.org/10.4028/www.scientific.net/KEM.452-453.621}},
doi = {{10.4028/www.scientific.net/KEM.452-453.621}},
volume = {{452-453}},
year = {{2011}},
}