Analysis of the stress state of multilayer pressed joints

This paper presents the results of analytical, numerical and experimental research of the stress–strain states of multilayer pressed joints in the field of elastic deformations. Suitable numerical (FEM) and analytical models were developed, in accordance with the small elastic deformations hypothesis, for analysis of the stress–strain state of multilayer pressed joints. Numerical and analytical research results were verified experimentally, using tensiometric measurements (strain gages) in laboratory conditions on real models. The purpose of such investigations was to clarify the cause of a fan shaft failure in the fossil fuel power plant.

► Paper presents the stress–strain state of multilayer pressed joint. ► Suitable numerical (FEM) and analytical models are developed. ► Resulting pressure on contact surface is consisted of several partial pressures. ► Small deformations hypothesis is applied. ► Numerical and analytical research results were verified experimentally.