This report presents the formulation and implementation of a friction model in the contact-impact algorithm based upon generalized pinballs (GPIN) recently introduced in the EUROPLEXUS code (also abbreviated as EPX). Some corrections are also applied to the much older pinball-based (PINB) contact-impact model of the code. For completeness, the closely related friction model used in the sliding-surface contact algorithm developed at CEA (GLIS), is also briefly presented.
Recently, EPX is being used to simulate vehicle crash against obstacles such as road barriers for safety and security studies. These studies involve complex contact-impact scenarios, which in EPX are typically modelled by the method of Lagrange Multipliers (LM), although other methods (e.g. penalty-based) are also available in the code. In some test cases, the effect of friction may be important and it must be included in the numerical simulations. Hence the importance of having robust and validated friction models available in the code.
The contact models with friction are tested in a series of problems ranging from academic cases to realistic applications, including a sliding disk in either 2D or 3D, a blast-loaded clamped plate experiment and a shocktube-loaded clamped plate experiment.
CASADEI Folco;
VALSAMOS Georgios;
LARCHER Martin;
Casadei, F., Valsamos, G. and Larcher, M., Treatment of friction in the PINB and GPIN contact-impact models of EUROPLEXUS, Publications Office of the European Union, Luxembourg, 2023, doi:10.2760/952517, JRC134229.
2023-08-09
Publications Office of the European Union
JRC134229
978-92-68-06071-1 (online),
1831-9424 (online),
EUR 31616 EN,
OP KJ-NA-31-616-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC134229,
10.2760/952517 (online),
