Local contact search by unconstrained optimization methods in the FE procedures for contact-impact problems

0367902 - ÚT 2012 DE eng A - Abstrakt
Kopačka, Ján - Gabriel, Dušan - Plešek, Jiří - Ulbin, M.
Local contact search by unconstrained optimization methods in the FE procedures for contact-impact problems.
4th GACM Colloquium on Computational Mechanics. Dresden: Technische Universität Dresden, 2011. s. 1-1.
[GACM Colloquium on Computational Mechanics /4./. 31.08.2011-02.09.2011, Dresden]
Grant CEP: GA ČR(CZ) GA101/07/1471; GA ČR GA101/09/1630; GA MŠMT(CZ) ME10114
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: contact-impact * normal vector * unconstrained optimization
Kód oboru RIV: JC - Počítačový hardware a software
http://gacm2011.bau.tu-dresen.de/

In this paper, the normal contact vector is computed by minimum distance problem between a point and a surface of quadratic element. This formulation yields system of two nonlinear equations. Methods for unconstrained optimization, particularly the Newton-Raphson method, the steepest descent method, Broyden's method and the BFGS method, are employed. Efficiency of the methods is compared by means of a numerical example consists of a contact-impact problem of two colliding thick plates.
Trvalý link: http://hdl.handle.net/11104/0006687