During car frontal crash, the front side member is expected to be folded progressively, so as to absorb more energy and to ensure enough passenger space. As the front member of a vehicle body, crushing characteristics of a S-shape thin-walled box beam under an axial load has received crucial attention both experimentally and numerically. In this paper, the axial impact crushing behaviour of the S-shape square tube is studied by an finite element method, and effectiveness of stiffening at the curved parts and shape perturbation at two straight parts of tubes are discussed. Based on the numerical analyses, maximization problem of the dynamic crushing energy absorption of S-shape square tubes is solved by using the crashworthiness maximization technique for tubular structures which combines the technique of response surface approximation, design-of-experiment as well as the usual mathematical programming.
Crashworthiness optimization of S-shape square tubes
Optimierung von S-förmigen Vierkantrohren hinsichtlich des Aufprallverhaltens
International Journal of Vehicle Design ; 31 , 1 ; 72-85
2003
14 Seiten, 10 Bilder, 7 Tabellen, 20 Quellen
Article (Journal)
English
Aufprall , experimentelle Untersuchung , experimentelles Ergebnis , Aufprallversuch , Profil (Bauelement) , Rahmen (Fahrzeug) , Pkw (Personenkraftwagen) , Optimierung , Energieaufnahme , Fahrzeugsicherheit , Formänderungsarbeit , Verformung , plastische Verformung , Kastenträger , numerische Simulation , Finite-Elemente-Methode , Versteifung , kinetische Energie
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