CONTRACT TECHNICAL REPORT "TRANSVERSE CRACKING AND DELAMINATION IN CROSS-PLY GRIEP COMPOSITES UNDER DRY, SATURATED AND IMMERSED FATIGUE" By Alex S. Selvarathinam and Y. Jack Weitsman Prepared for: Office of Naval Research Arlington, Virginia Mechanics Division Engineering Science Directorate Contract N00014-96-1-0821 y ;0102 0! Report MAES97-4.0-CM November 1997 tmo0Ujm^^'' : Mechanical and Aerospace Engineering and Engineering Science THE UNIVERSITY OF TENNESSEE Knoxville, TN 37996-2030 ur