Development of Virtual Buttocks which Evaluate the Deformation and the Pressure Distribution

Abstract

Virtual buttocks, which can simulate the contact deformation with some object in a real situation, is developed. By the pressure distribution obtained by the simulated contact deformation of the virtual buttocks, for example, with some seat, the comfortability of the seat can be evaluated. The virtual buttocks is modeled as a homogeneous chunk of flesh with a pelvis and a femur, and the homogeneous chunk is modeled as a hyper elastic one (Ogden model). A contact deformation is simulated by a finite element method. Although the simple buttocks model is employed, a simulated deformation of the buttocks for a seating case, the contact figure or the pressure distribution, has a good accuracy to the experimental one, by using of the material characteristic values of Ogden model, which are identified by the experiment.