Akademik Veri Yönetim Sistemi
7th AUTOMOTIVE TECHNOLOGIES CONGRESS, Bursa, Türkiye, 26 - 27 Mayıs 2014, sa.203, ss.1-8
In the present study, elastic – plastic material model and Johnson Cook material model was investigated comparatively which were used in the traditional passenger seat finite element modeling and moreover experimental correlation study was performed. Altair® RADIOSS® finite element software was utilized. Additionally, failure criteria for max plastic strain damage criteria is mostly known and used material model by industry , secondly, Johnson Cook failure criteria which is derived from cumulative damage law was applied. For St37-2 (S235JR) steel material tension, compression, torsion real tests were performed and engineering stress – strain curves were obtained.By using these curves, true stress - strain curves were calculated for both material model and max. failure criteria limit values were found. Analysis models were prepared by using these datas which were obtained with experimental test. Under ECE R-14 regulation, passenger seat leg failure behaviour was observed in virtual analysis. Additionally, concentrated force was applied to seat structure via hydrolic cylinder test machine in accordance to ECE R-14 and failure behaviour was observed in the real test condition. In conclusion, elastic – plastic material model and max. plastic strain failure criteria was given better correlation with experimental tests.