Development of Headform Impactor Finite Element Model Considering the Hyperelastic and Viscoelastic Responses of Rubber

  • Choong-Ryung Lee
  • Hyun-Yong Jeong


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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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Advanced Safety Engineering TeamHyundai Mobis R&D CenterGyeonggiKorea
  2. 2.Department of Mechanical EngineeringSogang UniversitySeoulKorea

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