Evaluation of Residual Stresses using Ring Core Method

The method for measuring residual stresses using ring-core method i s described. Basic relations are given for residual stress measur ement along the specimen depth and simplified method is described for average residual stre ss estimation in the drilled layer for known principal stress directions. The estimati on of calculated coefficients using FEM is described. Comparison of method sensiti vity is made with hole-drilling method. The device for method application is described and an example of experiment is introduced. The accuracy of method is discussed. The infl uence of strain gauge rosette misalignment to the evaluated residual stresses is pe rformed using FEM.