ABSTRACT
Abstract: The internal stresses and distortions in the buttock area of a person seated on a flat, hard and horizontal seat was analyzed by Finite Element Analysis. The model was based on real geometry. The actual, non-linear material properties are being investigated, and the analysis was carried out for different assumed values of the elasticity. The results show stress concentrations inside the soft tissue and along the ischium surface. These stresses exceeded significantly the interface stresses. The maximum interface pressure was, due to the model specificities, not confined to one single point, but showed a region of distribution.
