Residual Stress Analysis in Shot Peened and Fretting Fatigued Samples by the Eigenstrain Method


Article Preview

Residual stresses in titanium alloy samples that were subjected to shot peening followed by fretting fatigue loading were investigated using a combined experimental and numerical analysis procedure based on the concept of eigenstrain. Fretting fatigue loading was carried out in the pad – on-flat geometry using the Oxford in-line fretting rig. Flat-and-rounded pad shape was used to introduce the contact tractions and internal stress fields typical of the target application in aeroengine design. The specimens were in the shape of bars of 10mm square cross-section shotpeened on all sides. Both the pads and specimens were made from the Ti-6Al-4V alloy. Small remote displacement characteristic of fretting fatigue conditions was applied in the experiments. The residual elastic strains in the middle of the pad-to-sample contact and near the rounded pad edge were measured using synchrotron X-ray diffraction on Station 16.3 at SRS Daresbury. A combination of finite element analysis and the distributed eigenstrain method was used in the simulations. Commercial finite element analysis software, ABAQUS ver 6.41, was used to build the finite element model and to introduce the residual stresses into the model using eigenstrain distributions via a user-defined subroutine. In an unfretted shot peened sample an excellent agreement of residual stress profiles was obtained between the experimental data and model prediction by the variational eigenstrain procedure. In a fretted sample the residual stress change due to fretting was observed, and predicted numerically. A good correlation was found between the FE simulation prediction and the experimental data measured at contact edges.



Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander






A. M. Korsunsky et al., "Residual Stress Analysis in Shot Peened and Fretting Fatigued Samples by the Eigenstrain Method ", Materials Science Forum, Vols. 524-525, pp. 343-348, 2006

Online since:

September 2006




[1] Nowell, D., (1988) An analysis of fretting fatigue, DPhil thesis, Oxford University.

[2] Dini, D., (2004) Studies in fretting fatigue with particular application to almost complete contacts, D. Phil thesis, University of Oxford.

[3] Araujo, J.A., (2000) On the initiation and arrest of fretting fatigue cracks, DPhil thesis, Oxford University, UK.

[4] Korsunsky, A.M., Regino, G. and Nowell, D., (2004) Proc. Int. Conf. on Computational and Experimental Engng and Sci, Madeira.

[5] Prevey, P.S., Shepard, M.J. and Smith, P.R., (2001), 6th National turbine engine high cycle fatigue (HCF) conference.

[6] Collins, S.P., Cernik, R.J., Fell, B., Tang, C.C., Harris, N.W., Miller, M.C. and Oszlanyi, G., (1998) Journal of Synchrotron Radiation, 1263-1269.

[7] Dini, D. and Nowell, D., (2003), Wear, 254, 364-369.

[8] Korsunsky AM, Collins SP, Owen RA, Daymond MR, Achtioui S, James KE. (2002) Journal of Synchrotron Radiation 9, 77-81.

[9] Liu J, Kim K, Golshan M, Laundy D, Korsunsky AM. (2005) J. Appl. Cryst. 38, 661-667.

[10] Larson A.C., Von Dreele R.B. (2000), Los Alamos National Laboratory Report LAUR 86-748.

[11] Toby B.H. (2001), J. Appl. Cryst. 34, 210-21.

[12] Pawley, G.S. (1981). J. Appl. Cryst. 14, 357-361.

In order to see related information, you need to Login.