MECHANICAL RELAXATION OF LOCALIZED RESIDUAL STRESSES ASSOCIATED WITH FOREIGN OBJECT DAMAGE

Report No. UCB/R/02/A1191 LBNL-50157 Materials Sciences Division, Lawrence Berkeley National Laboratory, and Department of Materials Science and Engineering University of California at Berkeley MECHANICAL RELAXATION OF LOCALIZED RESIDUAL STRESSES ASSOCIATED WITH FOREIGN OBJECT DAMAGE B. L. Boyce 1* , X. Chen 2 , J. O. Peters 1** , J. W. Hutchinson 2 , and R. O. Ritchie 1 1 Materials Sciences Division, Lawrence Berkeley National Laboratory, and Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA 2 Division of Engineering and Applied Science, Harvard University, Cambridge, MA 02138, USA * present address: Sandia National Laboratories, P.O. Box 5800, MS 0889, Albuquerque, NM 87185-0889 ** present address: Technical University Hamburg-Harburg, 21071 Hamburg, Germany May 2002 submitted to Materials Science and Engineering - A Work supported by the U.S. Air Force Office of Scientific Research under Grant No. F49620-96-1-0478 under the auspices of the Multidisciplinary University Research Initiative on High Cycle Fatigue to the University of California (for numerical modeling and fatigue analysis), the Office of Science of the U. S. Department of Energy under contract #DE-AC03-76SF00098 (for experimental diffraction results), and the Stanford Synchrotron Radiation Laboratory, operated by the Department of Energy, Office of Basic Energy Sciences (for beamtime). 1

MECHANICAL RELAXATION OF LOCALIZED RESIDUAL STRESSES ASSOCIATED WITH FOREIGN OBJECT DAMAGE

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