Aufsatz
Modelling stress‐state dependent nonlocal damage and failure of ductile metals
Abstract
Damage and failure of ductile metals is highly influenced by the stress state. In fact, void growth takes place under hydrostatic tensile loading and void coalescence leads eventually to ductile failure. A completely different damage mechanism occurs for shear dominated loading that results in void elongation within a narrow shear band. In order to account for both failure mechanisms, a stress state dependent damage model is proposed. The model is based on a continuum damage mechanics approach, whereby nonlinear damage evolution is taken into account. The influence of the stress triaxiality and the LODE parameter on damage initiation and failure is considered by the Hosford‐Coulomb model. Pathological mesh sensitivity is prevented by an integral type nonlocal formulation. Finally, the proposed stress‐state dependent nonlocal damage model is verified by test data for the microalloyed high strength steel HX340LAD for a wide range of stress states.
Sponsorship
Gefördert im Rahmen des Projekts DEALCitation
@article{doi:10.17170/kobra-202101283087,
author={Nahrmann, Marvin and Matzenmiller, Anton},
title={Modelling stress‐state dependent nonlocal damage and failure of ductile metals},
journal={Proceedings in applied mathematics and mechanics (PAMM)},
year={2021}
}
0500 Oax
0501 Text $btxt$2rdacontent
0502 Computermedien $bc$2rdacarrier
1100 2021$n2021
1500 1/eng
2050 ##0##http://hdl.handle.net/123456789/12509
3000 Nahrmann, Marvin
3010 Matzenmiller, Anton
4000 Modelling stress‐state dependent nonlocal damage and failure of ductile metals / Nahrmann, Marvin
4030
4060 Online-Ressource
4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/12509=x R
4204 \$dAufsatz
4170
5550 {{Duktilität}}
5550 {{Metall}}
5550 {{Schadensmechanik}}
5550 {{Spannungszustand}}
5550 {{Modell}}
7136 ##0##http://hdl.handle.net/123456789/12509
<resource xsi:schemaLocation="http://datacite.org/schema/kernel-2.2 http://schema.datacite.org/meta/kernel-2.2/metadata.xsd"> 2021-02-15T17:28:54Z 2021-02-15T17:28:54Z 2021-01-25 doi:10.17170/kobra-202101283087 http://hdl.handle.net/123456789/12509 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 530 620 Modelling stress‐state dependent nonlocal damage and failure of ductile metals Aufsatz Damage and failure of ductile metals is highly influenced by the stress state. In fact, void growth takes place under hydrostatic tensile loading and void coalescence leads eventually to ductile failure. A completely different damage mechanism occurs for shear dominated loading that results in void elongation within a narrow shear band. In order to account for both failure mechanisms, a stress state dependent damage model is proposed. The model is based on a continuum damage mechanics approach, whereby nonlinear damage evolution is taken into account. The influence of the stress triaxiality and the LODE parameter on damage initiation and failure is considered by the Hosford‐Coulomb model. Pathological mesh sensitivity is prevented by an integral type nonlocal formulation. Finally, the proposed stress‐state dependent nonlocal damage model is verified by test data for the microalloyed high strength steel HX340LAD for a wide range of stress states. open access Nahrmann, Marvin Matzenmiller, Anton doi:10.1002/pamm.202000054 Duktilität Metall Schadensmechanik Spannungszustand Modell publishedVersion EISSN 1617-7061 Issue 1 Proceedings in applied mathematics and mechanics (PAMM) Volume 20 false e202000054 </resource>
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as Namensnennung 4.0 International