Abstract:

The property of foam materials is one of the key factors affecting automobile seat comfort. In this paper， the tensile and compression testing machine is used to measure sitting pressure of the seat foam materials and three single factor experiments are designed， i.e. the sitting pressure vs. foam density， the sitting pressure vs. foam hardness and the sitting pressure vs. foam rebound rate to analyze the correlation and the signification between the sitting pressure and different physical parameters are. Based on the 40 sets of experimental data， the evaluation model of the sitting pressure for foam materials is obtained by applying the least square regression method in the multidisciplinary optimization software HyperStudy. With this model the sitting pressure can be calculated to assess the seat comfort in the product design stage.

Key words: seat foam, assessment model for sitting pressure, foam density, foam hardness