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International Journal of Automotive Technology > Volume 19(3); 2018 > Article
International Journal of Automotive Technology 2018;19(3): 523-534.
doi: https://doi.org/10.1007/s12239-018-0050-z
DEVELOPMENT OF HEADFORM IMPACTOR FINITE ELEMENT MODEL CONSIDERING THE HYPERELASTIC AND VISCOELASTIC RESPONSES OF RUBBER
Choong-Ryung Lee1, Hyun-Yong Jeong2
1Hyundai Mobis
2Sogang University
ABSTRACT
To evaluate and analyze the pedestrian injury risk of automobiles, the finite element models of headform impactors are used. In this study, a modeling method that can accurately estimate the peak of the headform impactor impact pulse and head injury criterion (HIC) was developed. The headform impactor skin has the characteristics of both hyperelasticity and viscoelasticity. Therefore, compression tests, stress relaxation tests, and rheometer tests were conducted, and the hyperelastic and viscoelastic models were developed. The models were combined and used in the finite element analysis. The new headform impactor model was verified to accurately estimate the peak of impact pulse and HIC at the certification test of the headform impactor.
Key Words: HIC (Head Injury Criteria), Headform impactor, Rubber modeling, Hyperelasticity, Viscoelasticity
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