Assembly Stresses in a Maximum-Interference Joint

The features of studying the stress distribution in an axisymmetric maximum-interference joint, in which the inner part of the joint transforms into a plastic state, are described. The distributions of the circumferential and radial stress tensor components over the insert and bushing of an interference sample are analytically estimated. The calibration coefficients are adjusted with allowance for the stress gradient over the surface in order to calculate the stresses by drilling holes to detect strains by a strain-gage rosette. This made it possible to obtain a more uniform depth distribution of stresses: the coefficient of variation of circumferential stresses decreased from almost 10 to 3%, and the coefficient of variation of radial stresses, from 32 to 14%. The radial and circumferential stresses in the drilling zone of a probing hole are estimated and compared using strain gages and optical speckle interferometry.