Using Finite Elements Model of the Human Body for Shape Optimization of Seats: Optimization Material Properties

Year: 2002
Editor: Marjanovic D.
Author: Moes, N. C. C. M.; Horváth, I.
Section: Multidisciplinary aspects of design
Page(s): 857-866


An optimization procedure was developed to search for the ergonomically optimum product shape. The optimization entity is a FEM of the human body. The modification variable is the pressure in the contact area. The FEM and the optimization were developed for a seat.
This paper presents the FEM,in particular the material properties, and the first results of the FEA. The model is a simplified assembly including skin, bony parts and in between soft tissue. First experiments were to validate the material properties for agreement of the maximum pressure and the predicted pressure from regression formulas. A relationship of the maximum interface pressure and the stiffness is hypothesized. The results confirmed the hypothesis partly. The current model needs continued elaboration to test the hypothesis completely and to obtain a valid estimation of the material properties.

Keywords: ergonomics, finite elements Model, shape conceptualization, pressure distribution, ischial tuberosities, optimisation


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