Reverse engineering of CT-based rocker sole model—Finite element analysis

Footwear provides the primary surface of interaction with the environment during locomotion with foot. In order to minimize foot disorders, many manufacturers try to improve the material and structural design of footwear according to the biomechanics associated with foot and footwear. In this study, a preliminary 3D finite element foot-rocker sole model was established from actual CT scan information of three rocker sole molds and a male subject, for accurate implementation of the foot-sole-ground interaction in the mid-stance event. Results indicate that the high stress occurs on the heel and first metatarsal head for the foot part and the transformations of high stress can effectively disperse the pressure from rearfoot and forefoot to arch region of the foot for the sole part.