THE SURFACE CRACK PROBLEM FOR A FUNCTIONALLY GRADED COATING BONDED TO A HOMOGENEOUS LAYER Fazil Erdogan and Maheendra Kasmalkar Lehigh University Bethlehem, PA 18015 October 2000 AIR FORCE OFFICE OF SCIENTIFIC RESEARCH GRANT F49620-98-1-0028 DISTRIBUTION STATEMENT A 20010419 098 Approved for Public Release Distribution Unlimited