A Study of 5mph Front Impact Simulation of Front End Module (IPC-13)

摘要

As one of the cores of change of automobile industry, FEM(Front End Module) is rising on the standard of newly developed cars. FEM Carrier, front structure should be designed to endure impact energy of the car for the safety of the functional parts in order to meet the crash regulation and product requirements. Under low speed impact, crack frequently initiates at plastic part of Hybrid type Carrier. Torn Carrier means high repair cost in addition to the loss of assembling function of components such as Head Lamp, Radiator, and Condenser and so on. In this paper, deformation behavior of FEM and mechanism of Carrier crack on the crash were analyzed to improve the FEM 5mph impact performance. The effect of design variables such as Carrier, Stay, B/Beam, and the load path of impact energy of FEM have been investigated also. The results of simulation were verified by test. The most dominating factor of Carrier damage was the lateral displacement of B/Beam. From the results, Carrier and Stay design modification themselves found to be insufficient for the prevention of Carrier damage. Instead, the isolation of displacement between Carrier and B/Beam was found to be effective on the prevention of Carrier damage.