The automotive bumper has the functions of strength, rigidity and fine sight. It protects the driver, front and rear sides of car body through shock absorption at the traffic accident of car. This study investigates the impacts on front side and corner with the low speed of 4.5 km/h by using the model of SUV car body. The models are modelled by CATIA program with three dimensions and are analyzed by the finite element program of ANSYS Explicit STR. The maximum equivalent stresses at impacts of front side(case 1) and corner (case 2) at bumper are 261.72MPa and 365.02MPa respectively. As this stress at case 2 becomes 40% higher than at case 1, the impact of corner is happened easier than at the damage at the impact of front side. These stresses at case 1 and case 2 are shown above the yield stress at material property of steel, it is thought that there are the possibilities of plastic damages at two cases. The maximum deformation and equivalent stress at the support 2 of case 2 become 5 times and 3 times higher than at the support 1 respectively. The damage possibility due to impact at low speed is investigated by the basic analysis result of this study. And this result can be utilized at inspecting the result of impact test on bumper hereafter.

Recently imported vehicles are increasing rapidly and related vehicle accidents have also increased. In addition, the number of accident in 2010 was approximately 205,000 cases, about 6,000 billion to repair the vehicle accident was paid. RCAR low-speed crash tests to calculate the imported car insurance repairs, domestic cars and imported car repairs were compared. Average repair cost 2,920,000 won in domestic cars and imported cars are 14,570,000 won, imported cars were approximately five times higher than domestic cars. The results of comparing the total repair cost, imported vehicle repairs to the front of the T-car was the highest, rear repairs to the C-car was the highest. New car value for repairs, parts price, damage in terms of imported cars were higher than that of the domestic cars. In order to avoid the social costs of spending, calculated based on proper repairs on imported vehicles, improvement of excessively high parts prices and the repairman cost are needed.