Geometry and Material Strategies for Improved Management of Crash Energy Absorption
This study presents alternative approaches for the improvement of crash energy absorption in representative automobile crashworthy structures. One such approach is the use of configurable crush initiators introduced through localized heating in tubular structures. The main objective is to improve the ability to absorb impact energy in a progressive and controlled manner by a local modification of material properties. In this manner, associated with the softening of the aluminium alloy, the deformation can be introduced precisely, forcing the tubular structure to deform in a mode of high energy absorption and reducing the maximum load in a controlled manner. An alternative approach for controllable energy absorption consists in the internal pressurization of structures in the framework of a crash-adaptive response. Within this strategy, the effect of internal pressurization of tubular structures in a crashworthiness application is investigated. The concept of internal pressurization can be implemented as a crash-adaptive structure therefore allowing different responses according to the intensity of shock.
KeywordsImpact loading Crashworthiness Numerical simulation Experimental validation
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