Factors of the Design of the Fretting Phenomenon in the Development of Health Saving Shoes

Abstract

When designing the health-protecting footwear, the special focus is on the ergonomic features that characterize the level of matching of the footwear to the foot. They are of primary concern when creating the casual shoes, as well as the footwear for children, the elderly people and the pregnant women. When considering the interference of the footwear with the foot in the process of bedding or matching its inside to the shape of the human foot, one of the understudied phenomena that occurs during the process of walking is the fretting phenomenon, which leads to the appearance of roughness and calluses on the sections of the foot that contact with the inner surface of the footwear, destroys the material of the lining and the insole, as well as the product worn on the foot. In order to develop a calculation method of the fretting phenomenon in a pair of the ball part of the foot and insole, a model that includes system-forming elements, structure charts, fixed parameters, and control variables is proposed, which makes it possible to model study of the wear problem of movable contacting pairs and prevents its negative consequences.