Analisis Eksperimental Kegagalan Suspensi Belakang Light Truck Diesel

Abstract

The rear leaf spring of the light truck diesel vehicle tends to experience failure when passing through a potholed road carrying a load of 11,000 Kg. Therefore, it is necessary to determine the factors responsible for these failures using experimental and numerical studies to prevent the reoccurrence of similar cases. The experimental study includes visual inspection to determine the factors responsible for the breakdown based on the surface condition of the broken spring. This is in addition to using SEM observation to observe the fracture surface condition of fractography and the hardness test to evaluate the hardness value of leaf spring. To visualize the structure, a chemical composition test is employed to analyze the steel standard and microstructure observation. The chemical composition test showed that the leaf spring material complies with the AISI 5160 standard. The visual inspection consists of an initial crack, which is then observed on the SEM. The average hardness of the horizontal and vertical directions is 114.05 HRB and 113.40 HRB, while for the outer surface, it is 114.36 HRB. Based on the observation, the structure of the pearlite phase is less than the ferrite, indicating that the leaf spring has more ductile properties.