Syntactic Foam Core Aluminum Sandwich Lightweight Car Hood For Pedestrian Protection

Can Y., Yazıcı M.

7th International Advances in Applied Physics and Materials Science Congress Exhibition, Muğla, Turkey, 22 - 26 April 2017, pp.96

  • Publication Type: Conference Paper / Summary Text
  • City: Muğla
  • Country: Turkey
  • Page Numbers: pp.96
  • Bursa Uludag University Affiliated: Yes


The pedestrian-vehicle traffic accidents are one of the larger health problems in the World. The car manufacturers are paying attention this subject and trying to reduce fatal results by developing active or passive safety solutions. One of the passive safety systems is using energy absorber material in the most pedestrian crashed car body elements. These components absorb more energy during pedestrian-vehicle impact and cause less injury in the pedestrian body. The most critical part of the collided pedestrian body is the head. More than 70% of the deaths in the pedestrian-vehicle collisions comes from the head impact. In this study, various sandwich structures were designed for car hood for pedestrian head injury reduction. In the sandwich panels, the face sheets were used as thin aluminum plates and core materials were chosen as syntactic foams. Syntactic foams have high energy absorbing performance under impact loading. They can be un-flammable and high-temp resistive. The main goal of the presented study to develop a sandwich structure for car hood to reduce fatality in the pedestrian-car accidents by decreasing HIC (Head Injury Criteria) value. Sandwich panel face sheet, syntactic foam core thickness and syntactic foam types were the studied as research parameters by means of the Finite Element Analyses. The pedestrian head form was modeled according to EEVC/WG17 regulations and used in the FE simulations. The lightest hood and the minimum HIC value have been achieved in the thinner front face, and thicker back face sandwich structures. In the case of elastomeric syntactic foam core, the smallest pedestrian head injury was accomplished.