Datum
2021-12-14Schlagwort
620 Ingenieurwissenschaften SchadensmechanikMathematisches ModellFinite-Elemente-MethodeDuktilitätStahlblechMehrachsige BeanspruchungMetadata
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Aufsatz
Nonlocal damage modelling for finite element simulations of ductile steel sheets under multiaxial loading
Zusammenfassung
The finite element simulation of forming processes or vehicle crash scenarios involves multiaxial loading conditions in general. Thereby, damage and failure in ductile steel sheets is triggered by void growth under hydrostatic tensile loading or by void elongation within a narrow band under shear dominated loading. These different damage mechanisms are considered by a stress state dependent continuum damage model. The damage initiation and failure are represented by a critical and a failure strain. Both are HOSFORD-COULOMB type functions of the stress triaxiality and the LODE parameter and, thus, incorporate the stress state dependence of the damage mechanisms. Due to the pathological mesh sensitivity for continuum damage models, an enhancement towards nonlocal damage evolution is carried out. Thereby, two options are investigated and compared: the integral nonlocal formulation and the gradient enhanced approach. Finally, the proposed nonlocal ductile damage model is verified for a wide range of stress states by test data of various tensile and shear specimens.
Zitierform
In: Proceedings in applied mathematics and mechanics (PAMM) Volume 21 / Issue 1 (2021-12-14) eissn:1617-7061Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202112165262,
author={Nahrmann, Marvin and Matzenmiller, Anton},
title={Nonlocal damage modelling for finite element simulations of ductile steel sheets under multiaxial loading},
journal={Proceedings in applied mathematics and mechanics (PAMM)},
year={2021}
}
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2022-02-16T12:44:28Z 2022-02-16T12:44:28Z 2021-12-14 doi:10.17170/kobra-202112165262 http://hdl.handle.net/123456789/13628 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 620 Nonlocal damage modelling for finite element simulations of ductile steel sheets under multiaxial loading Aufsatz The finite element simulation of forming processes or vehicle crash scenarios involves multiaxial loading conditions in general. Thereby, damage and failure in ductile steel sheets is triggered by void growth under hydrostatic tensile loading or by void elongation within a narrow band under shear dominated loading. These different damage mechanisms are considered by a stress state dependent continuum damage model. The damage initiation and failure are represented by a critical and a failure strain. Both are HOSFORD-COULOMB type functions of the stress triaxiality and the LODE parameter and, thus, incorporate the stress state dependence of the damage mechanisms. Due to the pathological mesh sensitivity for continuum damage models, an enhancement towards nonlocal damage evolution is carried out. Thereby, two options are investigated and compared: the integral nonlocal formulation and the gradient enhanced approach. Finally, the proposed nonlocal ductile damage model is verified for a wide range of stress states by test data of various tensile and shear specimens. open access Nahrmann, Marvin Matzenmiller, Anton doi:10.1002/pamm.202100092 Schadensmechanik Mathematisches Modell Finite-Elemente-Methode Duktilität Stahlblech Mehrachsige Beanspruchung publishedVersion eissn:1617-7061 Issue 1 Proceedings in applied mathematics and mechanics (PAMM) Volume 21 false e202100092
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