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Analysis of Degressive Front Car Crash Structures

Szlosarek R., Neuber R., Kröger M.

Machine Dynamics Research

2018

Vol. 42, No. 2

45--51

Minimizing the injury risk to passengers in frontal crash situations represents the superior goal of the car structure engineering. In contrast to the existing systems, the use of a degressive front car structure can improve the crash performance. This paper presents a ﬁnite element modelling method allowing to study the inﬂuence of the force-displacement curve of the main chassis beam on the crash performance with respect to the passenger injury risk. A solution for realizing a degressive main chassis beam was tested in a drop tower. The result shows that the constructed main chassis beam works, and that it signiﬁcantly reduces the injury risk to the passenger.

Development of Crash Absorbers Made of Carbon Fibre-Reinforced Plastic Based on Experimental Studies

Szlosarek R., Bombis F., Mühler M., Kröger M.

Machine Dynamics Research

2015

Vol. 39, No. 4

65-72

Crash absorbers made of carbon fibre-reinforced plastics (CFRP) become more and more popular to reduce mass in the front structure of cars. One open question in this issue is the correct layup, which specifies the fibre orientation, in order to obtain high specific energy absorption. Within the research, a first test series investigates crash absorbers with a fibre orientation in axial and circumferential direction and an orientation of ±45°. Based on these first experimental studies an optimisation of the layup results in a crash absorber made of CFRP with a significant higher specific energy absorption than a comparable crash absorber made of aluminium.