Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad,Iran
Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad ,Iran
Cold working a hole decreases tendency of fatigue crack near the hole to initiate or growth. It is due to creation some compressive tangential residual stresses around the hole. In this paper strains recorded by strain gages mounted around the hole during cold working process has been introduced as a feature for residual stress field. Finite element modeling has been used for verifying the experimental results, which showed a good agreement. Also fatigue test has been performed on specimens with and without cold working which showed increasing of fatigue life.