SLID: a sliding-line and sliding-surface algorithm for smooth contact in EUROPLEXUS
This report presents the formulation and implementation in the EUROPLEXUS code of a new contact algorithm named SLID, based on the sliding surface paradigm.
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 may include at the same time situations typical of crash, characterized by large deformation of the contacting bodies, and other situations more typical of contact. In some test cases, the effect of friction
may be important, especially in the parts of the model undergoing smooth contact, and it must be included in the numerical simulations.
Before the present work, three main contact-impact models were available in EPX. The pinball-based model PINB is very robust at contact detection but presents some serious drawbacks in treating smooth contact, especially with friction, at least when the Lagrange Multiplier method is used for contact enforcement. The GPIN model retains PINB's robutness in contact detection and is more effcient than PINB in smooth contact situations, but its implementation is complex and not yet fully developed. The GLIS model, based on the sliding surfaces paradigm, is ideal by design for the treatment of smooth contact, but suffers from serious pitfalls in contact detection.
The present SLID model tries to improve on robustness in contact detection while retaining the good properties of GLIS in smooth contact situations, without or with friction.
CASADEI Folco;
VALSAMOS Georgios;
LARCHER Martin;
2023-08-09
Publications Office of the European Union
JRC134174
978-92-68-06564-8 (online),
1831-9424 (online),
EUR 31626 EN,
OP KJ-NA-31-626-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC134174,
10.2760/298646 (online),
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