International Conference on Technology, Engineering and Science (IConTES), Antalya, Turkey, 29 October - 01 November 2020, vol.11, pp.98-105
Within the scope of this study, the metal part (S420 MC) used in the truck seat structure was modelled along with the finite element method of the continuous glass fiber reinforced composite material that will be used to produce with composite technology. Part design studies and ECE R14, ECE R17 and ST0791 regulations analysis applied to composite production of the relevant seat part have been realized. In this work, heavy commercial vehicle passenger seat backrest was chosen as the study product. The backrest of the existing weight is 3200 gr and the related backrest was welded from S420 MC tube. Based on this, weight reduced to 1700 gr by performing over-molding method under favor of using polypropylene / GF 40 raw material on Epoxy Resin based (OM14) pre-preg material and weight reduction have successfully substantiated. The mechanical properties (yield & ultimate strength, stress and strain values) of the materials used as the acceptance criteria of the models were determined as the relevant acceptance ranges. Design studies have been analyzed in varied scenarios. Within the scope of the analysis studies, the design that encounters the mechanical limits of the material for all the scenarios was determined as the accepted design. While there is a static loading condition for ECE-R14 analysis, there are dynamic boundary conditions for ECE-R17. In the designs, ribs were added to the areas above the mechanical limits of the material, revisions were made in the thickness of the material and the current design was achieved by using engineering changes such as forming.