Abstract
The corrugated cardboard is widely used for packing in the transportation. Therefore, the technology that minimizes various transportation accidents is necessary. Especially, the accidents by the impact occupies the more than the half of the accidents. There are many researches that evaluates the maximal acceleration of the corrugated cardboard under the impact. However, because the maximal acceleration is not necessarily corresponding to the damage of contents, it is difficult to evaluate the impact of the corrugated cardboard only by the maximal acceleration. Also the place to measure is the center of the ground side but it is not discussed about the measuring place. In this paper, impact force is applied by a free fall test by a guide rail to drop it straight to the ground. The ID acceleration sensor, are glued in several place to make clear the difference between the measured place. From the experiment, we considered impact energy and the maximal acceleration. In addition, we made an analytical model of the corrugated cardboard to analysis to identity the damage. As a result, strain energy has a correspondence between the experiment and the analysis and the maximal acceleration didn't have it. So, the utility of the strain energy was able to be shown as a method of evaluating the impact using FEM. Through this result, we watched how the energy spread and found out the center of the ground side and the wall side has a high energy when it's impacted and when a few second pasts the wall side still has a high energy because of the vibration of the cardboard. To find out the relation between the data from the corrugated cardboard and the contents. As a result, the maximal acceleration has a strong relation between the center of the ground side and the energy has a strong relation between the middle of the center and the corner. Finally, we also considered HIC36 to evaluate the impact.
