NASA Contractor Report 165989 NASA-CR-165989 19820018832 TRANSIENT THERMAL STRESS PROBLEM FOR A CIRCUMFERENTIALLY CRACKED HOLLOW CYLINDER H. F. Nied and F. Erdogan LEHIGH UNIVERSITY Bethlehem, Pennsylvania 18015 Grant NGR 39-007-011 September 1982 . NI\SI\ .. National Aeronautics and Space Administration . Langley Research Center Hampton, Virginia 23665 1111111111111 1111 11111 1111111111 11111 11111111 NF02100 U,NGLEY RESEARCH CENTER LIBRARY, NASA VIRGINIA