A study on collision energy absorption control of fast moving object: experimental consideration on deformation characteristics of energy absorption member

抄録

At the front of the vehicle, there is a front side member (FSM), which is the main skeleton of the vehicle, and a crash box (CB) attached to the tip that absorbs impact energy. In the event of a collision, it is necessary to improve the energy absorption performance and absorb more energy with less deformation without deforming the FSM. In this study, carbon fiber reinforced plastic (CFRP) was used for CB. CFRP can be easily formed into the shape required by the designer. In order to compare the crushing ability of CB, a drop weight test is performed using test pieces with partially different numbers of layers. To compare the impact energy absorption performance of the proposed CFRP pipe, two types of test pieces in which the length of the part where the ply number of prepreg of CFRP was reduced partly was different were produced for the drop weight test experiment. From the experimental results, the test piece with the long portion where the structural strength was intentionally reduced was able to decrease the impact load in the whole of the crushing process. Accordingly, it is obtained that the crushing amount of the test piece could be controlled by changing the ply number of test pieces and creating a part where the strength was intentionally reduced.