THE STRENGTH OF SIMPLE BELT GUIDE UNDER TENSION

Abstract

We present the development of a safety system (the safety belt) that satisfies not only resistance, but also cost and durability criteria. We used in order to develop this system both experimental and numerical approaches. In this paper, we present the stress and deformation analysis of the safety belt simple belt guide. The analysis of the stress state is realized by using both the finite element method (FEM) both in linear and non-linear states and the tensile breaking and the photoelastic method. Both numerical and photoelastic methods of analysis determine the danger zones for the safety belt guide. The validation of the obtained results was done by the traction load trial in similar conditions to real world safety belt guide usage, by using 10 randomly selected samples from a 100 lot. The breaking belt guide is applied on every studied piece, with special attention being taken to the tension concentration zone both experimentally and with the finite element and photoelasticity methods. The results thus obtained can be used to optimize the shape of the safety belt guide and the manufacturing technology.