Extension of the modified Mohr-Coulomb fracture model by a strain rate and temperature dependence

authored by: Dominyka Vasquez Ramirez, Hendrik Wester, Daniel Rosenbusch, Bernd Arno Behrens
Abstract: During industrial sheet metal processes such as shear cutting, high temperatures and strain rates occur. Due to materials dependency on temperature and strain rate, the numerical fracture modelling should consider these both highly influential factors for accurate simulation results. Since the widely used Modified Mohr-Coulomb (MMC) fracture model does not take the dependency on temperature and strain rate into account, the objective of this research is therefore to extend the MMC fracture model. For the fracture characterization, miniaturised tensile tests under variation of specimen geometry, temperature and strain rate are conducted. Additionally, tensile tests with butterfly specimens under varying stress states are carried out. In order to determine material specific MMC parameters, the experimental tests are numerically depicted in Abaqus. The temperature and strain rate extension of the MMC fracture model is based on the Johnson-Cook failure model. With this approach, a temperature and strain-rate dependent MMC fracture model is developed for the dual phase steel DP980.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Type: Conference contribution
Pages: 1407-1416
No. of pages: 10
Publication date: 19.04.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science
Electronic version(s): https://doi.org/10.21741/9781644902479-152 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{18f1ec7ed1be4c69b9ab41d65eb49030,
title = "Extension of the modified Mohr-Coulomb fracture model by a strain rate and temperature dependence",
abstract = "During industrial sheet metal processes such as shear cutting, high temperatures and strain rates occur. Due to materials dependency on temperature and strain rate, the numerical fracture modelling should consider these both highly influential factors for accurate simulation results. Since the widely used Modified Mohr-Coulomb (MMC) fracture model does not take the dependency on temperature and strain rate into account, the objective of this research is therefore to extend the MMC fracture model. For the fracture characterization, miniaturised tensile tests under variation of specimen geometry, temperature and strain rate are conducted. Additionally, tensile tests with butterfly specimens under varying stress states are carried out. In order to determine material specific MMC parameters, the experimental tests are numerically depicted in Abaqus. The temperature and strain rate extension of the MMC fracture model is based on the Johnson-Cook failure model. With this approach, a temperature and strain-rate dependent MMC fracture model is developed for the dual phase steel DP980.",
keywords = "Dual-Phase Steel, Fracture Characterisation, MMC Fracture Model",
author = "{Vasquez Ramirez}, Dominyka and Hendrik Wester and Daniel Rosenbusch and Behrens, {Bernd Arno}",
note = "Funding Information: The authors are much obliged to the DFG (German Research Foundation) for the financial support of the project “Improved FE simulation of the shear cutting process using a temperature and strain rate-dependent extension of the MMC model” (project number: 199808648).; 26th International ESAFORM Conference on Material Forming, ESAFORM 2023 ; Conference date: 19-04-2023 Through 21-04-2023",
year = "2023",
month = apr,
day = "19",
doi = "10.21741/9781644902479-152",
language = "English",
isbn = "9781644902462",
series = "Materials Research Proceedings",
publisher = "Association of American Publishers",
pages = "1407--1416",
editor = "Lukasz Madej and Mateusz Sitko and Konrad Perzynsk",
booktitle = "Material Forming",
}