Increased application of high strength steel sheets to automobile bodies is a practically effective means to reduce body weight and to enhance the fuel mileage of automobile, which meet the social requirement of decreasing loads on the global environment. Although the reduction of body weight without sacrificing collision safety can be attained by applying steel sheets of high strength to the bodies, this type of sheets may result informing problems such as fracture or springback during sheet forming. This article reports Finite Element Method (FEM) analysis, which has been successfully applied to clarify energy absorption during collisions, formability of tailor-welded blanks and springback behavior of high strength steels used for automotive body parts. A collision analysis of structural members clarified the effects of the strength of materials, collision speed, strains, strain rate, etc., on the collapse deformation during collisions. Analyses and experiments on tailor-welded blanks in basic plane-strain deep-drawing forming were conducted and the validity of the evaluation by FEM analyses was confirmed. The shape fixability of high-strength steel sheets was analyzed and the effects of material strength, sheet thickness, bending radius on shape fixability, etc, were made clear. The analysis results contribute to the improvement of forming process and the development of high strength steel sheets. (Engl. translation from Kawasaki Steel Giho, 33 (2001), Number 2, Pages 66-71 (jap.)) (VDEh)
Utilization of finite element method for expanding application of high strength steels to automotive body
Anwendung der Finite Elemente Methode zur Ausweitung der Einsatzmöglichkeiten von hochfesten Stählen im Karosseriebau
Kawasaki Steel Technical Report ; 46 ; 12-18
2002
7 Seiten, 13 Bilder, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
hochfester niedrig legierter Stahl , Finite-Elemente-Methode , numerisches Verfahren , Festigkeitslehre , Spannungsberechnung , Kraftfahrzeugbau , Karosserie , mechanische Eigenschaft , mathematisches Modell , Leichtbauweise , Spannungs-Dehnungs-Diagramm , maßgeschweißtes Blechformteil , zweiachsige Verformung
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