Abstract
This paper presents mechanical simulation of resin foam with the self-centered cells under the unidirectional compression load. Sports shoes mainly have various resin foams as midsoles, which produce the shock attenuation. The stress-strain curves under compression are really complex, which are classified into 3stages, elastic, plateau and densification. It's said that these stages are derived from cell wall deformations and included gas in the cells. In order to design the shock attenuation, the control of the above complex behavior is necessary. In this study, we constructed a numerical model of resin foam considering the micro structure based on the CT images. For checking the validity of this model, a stress-strain curve under quasi-static compression is compared with an experimental result. Through these results, it reveals that the cell wall deformations are the trigger to the complex mechanical behavior and the effect of gas in the cells can be ignored.
