Evaluation of AW-6082 Aluminium Bar Shearing Simulation

authored by: Sonda Moakhar, Hamdi Hentati, Maher Barkallah, Jamel Louati, Christian Bonk, Bernd-Arno Behrens, Mohamed Haddar
Abstract: Bar shearing is an important operation that supplies semi-finished billets to many metalworking processes such as stamping, extrusion and precision forging. Temperature rise and stress state variation during shearing have a great influence on material behavior and rupture mechanics. Consequently, accurate simulation of shearing requires a precise material modeling. The studied material is the AW-6082 aluminium alloy. This paper concerns principally the improving of shearing simulation by means of adequate modeling of ductile failure. The major contribution of this study is to present a relatively uncomplicated method to calibrate a decoupled damage model. To this purpose, the Hooputra ductile damage (HDD) model is selected since it reflects the influence of different stress states and temperature variations on the mechanical failure of the material. The triaxiality is considered as indicator of the stress state. The identification of the parameters of the damage model is based on a hybrid experimental-numerical analysis of three characterization tests, namely tension tests on smooth bars, tension tests on notched bars and shear tests. The obtained calibrated damage model is employed to simulate shearing. The fracture is simulated using the “element deletion” technique. Computed shearing results are eventually evaluated by comparing simulated force-displacement curve to experimental one.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): University of Sfax
Type: Conference contribution
Pages: 142-149
No. of pages: 8
Publication date: 18.09.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Automotive Engineering, Aerospace Engineering, Mechanical Engineering, Fluid Flow and Transfer Processes
Electronic version(s): https://doi.org/10.1007/978-3-030-24247-3_16 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{4abfc64ac0b1470c846a113c5f84ca9c,
title = "Evaluation of AW-6082 Aluminium Bar Shearing Simulation",
abstract = "Bar shearing is an important operation that supplies semi-finished billets to many metalworking processes such as stamping, extrusion and precision forging. Temperature rise and stress state variation during shearing have a great influence on material behavior and rupture mechanics. Consequently, accurate simulation of shearing requires a precise material modeling. The studied material is the AW-6082 aluminium alloy. This paper concerns principally the improving of shearing simulation by means of adequate modeling of ductile failure. The major contribution of this study is to present a relatively uncomplicated method to calibrate a decoupled damage model. To this purpose, the Hooputra ductile damage (HDD) model is selected since it reflects the influence of different stress states and temperature variations on the mechanical failure of the material. The triaxiality is considered as indicator of the stress state. The identification of the parameters of the damage model is based on a hybrid experimental-numerical analysis of three characterization tests, namely tension tests on smooth bars, tension tests on notched bars and shear tests. The obtained calibrated damage model is employed to simulate shearing. The fracture is simulated using the “element deletion” technique. Computed shearing results are eventually evaluated by comparing simulated force-displacement curve to experimental one.",
keywords = "Bar shearing, Decoupled damage model, FEM, Stress triaxiality",
author = "Sonda Moakhar and Hamdi Hentati and Maher Barkallah and Jamel Louati and Christian Bonk and Bernd-Arno Behrens and Mohamed Haddar",
year = "2019",
month = sep,
day = "18",
doi = "10.1007/978-3-030-24247-3_16",
language = "English",
isbn = "978-3-030-24246-6",
series = "Lecture Notes in Mechanical Engineering (LNME)",
publisher = "Springer Nature",
pages = "142--149",
editor = "Fakher Chaari and Maher Barkallah and Bassem Zouari and Mohamed Haddar and Khabou, {Mohamed Taoufik} and Anas Bouguecha and Mounir Kchaou",
booktitle = "Advances in Materials, Mechanics and Manufacturing",
address = "United States",
edition = "1.",
note = "2nd International Conference on Advanced Materials, Mechanics and Manufacturing, A3M 2018 ; Conference date: 17-12-2018 Through 19-12-2018",
}