Acceleration-based criterion for intrusions in frontal impacts

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Acceleration-based criterion for intrusions in frontal impacts

Sadeghipour, Emad / Danquah, Benedikt Ohene / Lienkamp, Markus

Although the importance of crash compatibility has been highlighted as an area for further improvement in terms of passive safety, the way in which partner-protection is assessed is still an unresolved problem. Some assessment approaches have been proposed that are based on the structural interaction between the test vehicle and the barrier. However, previous studies have shown that new concepts are needed due to the deficiencies in these approaches. An innovative approach is to use a moving deformable barrier as a collision partner, and assess the partner-protection using injury measurements on a virtual dummy on the moving barrier. While some acceleration-based criteria do exist that would allow us to assess injuries caused by high restraint loads, it is still unclear how to measure injuries caused by intrusions. Thus, we have developed an acceleration-based criterion for predicting significant intrusions into the compartment, which can be used in frontal impact tests with moving deformable barriers for assessment of the crash compatibility. The criterion developed is calibrated with the help of full-scale crash tests and validated with test data and simulation analysis. The results confirm the efficiency and reproducibility of the criterion developed for predicting significant intrusions in frontal impacts based on accelerometer measurements.