The analysis of structural crushworthiness is crucial for passenger vehicles. Box- or profile-type structures are considered as energy absorption elements in presence of frontal impact. The structural deformation mechanism is a process of plastic buckling with the formation of several folds. This process has been extensively studied both experimentally and numerically in the case of symmetrical/axial loading generated from a frontal crush. In the case of an oblique collision, the structure under investigation shows an abrupt fall in plastic energy absorption because, instead of the fundamental buckling mechanism, an intensive local bending mode is activated near the opposite fastened end, already for a low critical angle. Here, a solution is indicated on how to improve the workability of such box- or profile-type structures by the redistribution of mass and stiffness characteistics along the element lenghts.
Computer modelling of the energy absorption process in box-type structures under oblique impact
Rechnersimulation des Energieaufnahmeverlaufs in kastenförmigen Strukturen bei schrägverlaufendem Stoß
1996
6 Seiten, 6 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
Computer modelling of the energy absorption process in box-type structures under oblique impact
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