Crashworthiness Study for Automotive Seat Head Restraints by Finite Element Analysis with Simplified Seat Model and Linear Impact Tests

Date

2024-1-23

Author

Aytimur, Elif Ezgi

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With the increase in the number of the traffic collisions, vehicle safety systems have gained importance. There is a wide variety of safety systems which have vital \hbox{importance} in the vehicles. Head restraints are important safety component in vehicles and must conform the requirements of Annex 6 of UN ECE R17 regulation by applying physical tests on the linear impact test system. Generally, the head restraints and seats manufacturers conduct Finite Element Analysis (FEA) of the head restraint together with the complex seat model which includes foams, covers, structural parts, joints, seat belt parts, functional parts, etc. In this thesis study, front and rear impact tests for the head restraints mounted on the bench type seat of light commercial vehicle have been realized on the linear impact test system in METU-BILTIR Center Vehicle Safety Unit according to Annex 6 of UN ECE R17. Based on the test results, a method to estimate result of the linear impact test of the head restraint is proposed by considering the complete head restraint model with the simplified seat model instead of the complex seat model. FEA for front and rear impact tests of the head restraint mounted on the simplified seat model are conducted. FEA results and linear impact test results are compared, and they are in good agreement. It is shown that head restraint manufacturers can use this proposed method and can be confident about success of the head restraint in the linear impact tests beforehand.

Subject Keywords

Head Restraint, Vehicle Seat, Crashworthiness, Vehicle Safety, Linear Impact Test

URI

https://hdl.handle.net/11511/108410

Collections

Graduate School of Natural and Applied Sciences, Thesis