Injury simulation of rear seat child occupant in offset deformable barrier frontal impact

Takahashi, Tomoshi; Fukushima, Satoshi; Kitagawa, Yuichi; Yasuki, Tsuyoshi

Affiliations

Abstract

From 2016, Euro NCAP plans to assess child occupant protection performance with Q6 and Q10 dummies in a 64 km/h offset deformable barrier (ODB) frontal impact test. This paper describes research simulating this frontal impact test using a ten-year old (10YO) version of the Total Human Model for Safety (THUMS) and an FE model of the Q10 dummy. The changes in impact kinematics and injury values of the 10YO THUMS model were compared with the Q10 dummy under various load limiter (L/L) values ranging from 2 to 5 kN, and the differences between the two were examined.

Differences in the kinematics between the two mostly appeared during the second half of the test. As a result, the displacement of the head and chest of the Q10 dummy was smaller than that of the 10YO THUMS model. This result was probably because the thoracic plate of the Q10 dummy hindered the flexion of the thoracic spine. In addition, the chest upper deflection of the Q10 dummy resulted in higher injury values. This result was assumed to be because the shoulder belt was positioned close to the chest upper deflection gauge. In addition, the change in the chest upper deflection of the Q10 dummy was greater than that of the 10YO THUMS model, with a sensitivity of approximately four times as large. This result was due to the high force transmission ratio from the clavicle to the sternum.

Links

URL: http://www-esv.nhtsa.dot.gov/Proceedings/24/files/24ESV-000048.PDF

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Cited By (1)

Year	Entry
2019	Katsuhara T, Yamamae Y, Yasuki T, Umetani H. Analysis of kinematcis and head injury mechannisms in car to child cyclsit collision simulation using human finite element model. In: Proceedings of the 26th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 10-13, 2019; Eindhoven, Netherlands.