Calibration of strain rate and temperature dependent models up to rupture of high strength steels

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The PhD work will take place at IRDL (Lorient), with regular meetings with the European partners. As
English is the common language for all the presentations/written reports, a good level (B2-C1) of English
is necessary.

Expected skills: mechanics of materials, finite element simulation (Abaqus), framework of elasto-visco-plasticity,
metallic materials, experimental mechanics, Python as programing language

The aim of this PhD is to develop a calibration procedure for visco-plastic models dedicated to high
strength steels, as well as the necessary experimental database, using different set-ups at IRDL, like
bulge test on Hopkinson bars [4] and Gleeble tests at high temperature, e.g. up to 500°C [1]. The
experimental database should also include tests for calibrating hardening and initial anisotropy.
Moreover, calibration of a rupture criterion should also be included [5], as rupture prediction is an
essential aspect in the mechanical design of a test. Strain distribution would be measured by digital
image correlation (DIC) and as a hybrid experimental approach is necessary, a DIC-to-FE (finite element)
procedure would be used with the software MatchID1. A dedicated constitutive equation should be
chosen and/or developed, to reproduce the strain rate and temperature dependent features of the
mechanical behavior of high strength steels.

More details : PhD2021 IRDL VFormsSteels

The project : European project VForm-xSteels (http://www.vform-xsteels.eu)

Supervisor: Pr Sandrine THUILLIER

Starting date: September 2021

Duration: 3 years position

To apply to the position: send a CV and a motivation letter to S. Thuillier, email address:
<sandrine.thuillier@univ-ubs.fr>

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