WIT Press

Crash Deformation Of Side Members – Why Not Use A Bumper?


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M. Zatek, Z. Poruba & Q. Yu


The entire research carried out deals with the car frontal frame structure crash problem. In particular, the conducted study is aimed at general design improvement for the situation of a car crash into a rigid unmovable wall with different angles of contact. The structure behaviour was studied from the mechanical point of view and a new design was suggested. The performance describing the data calculated from the new design were confronted to status quo ante. The best performance design was chosen for further improvement via optimization. From the result obtained, a set of new proportion ratios for the design of a frontal car frame structure was calculated. Keywords: car crash, explicit dynamics, optimization, design improvement. 1 Introduction There are very few things that describe the era we are living in, but one of these symbols is undoubtedly the car. This invention has been influencing and reflecting the level of engineering techniques achieved for decades. As the car is a very convenient means of transport, the total number of cars has been increasing year on year since its inception. This obviously yields more complicated traffic situations on the roads and, unfortunately, more common collisions. In such situations, we would like our cars to be constructed to be safe enough to prevent us from any possible injury. Unfortunately, the crash conditions vary significantly from collision to collision. In this study, the intended objective is to re-design the initial frame and in this way improve the behaviour in the case of a crash into an unmovable rigid wall with different angles of contact.


car crash, explicit dynamics, optimization, design improvement.