Concept selection of a new longitudinal member design with developed bi-metallic model

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Khalid K.S.
Tarlochan F.
AL-Qrimli H.F.
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Advanced Engineering Solutions
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Steel material has a widely use in automotive applications for the high stiffness that could provide more safety for the passengers. On the other hand, the steel has quite a heavy weight due to its high density. A new longitudinal member design has been presented in order to give more safety in many crash situations. Two dynamic collision tests (frontal and oblique) have been simulated. The new design concept needs two separate components. An interior tube called the crash component. This component is simulated with a bi-metallic material (combination of steel and aluminum) to reduce the weight by up to 25 %. This interior tube controls the front crash test to exhibit a desirable energy. The outer part called the support component, contains four stiff tubes fitted to each other in order to slide over each other like a telescope. The outer component produces high bending resistance in the case of an oblique collision. There are five different concepts for the telescope (arc side, inside arc side, hat side, taper side and sharp side). The complex proportional assessment method (COPRAS) has been used for selecting the best design. Using the COPRAS method helps to meet the satisfaction of engineering specifications and costumer needs. Six different criteria, which were specified as specific energy absorption, crash force efficiency for frontal and 30 degrees, cost and ease manufacturing, were analyzed to form the initial matrix. It is concluded that the sharp angle side can be used for the longitudinal member design with a mid car model. � 2015, Advanced Engineering Solutions [AES COM] Ottawa, CANADA.
Model automobiles; Palladium; Safety engineering; Telescopes; Automotive applications; Complex proportional assessments; COPRAS; Engineering specification; Metallic material; Oblique crash; Selection of concept; Specific energy absorption; Crashworthiness