Azi -OPert MaY be relabcd #6o 2. Vz T1.f*A.M REPORT NO. 2-0y50 CRACK EXTENSIONIN FIBERGLASS REINFORCED PLASTICS HARD COPY . MICROFICHE J, . by Edward M. Wu R. C. Router, Jr. Sponsored by U. S. Bureau of Naval Weapons Contract NOw 64-0178-d DDC DDCIRA E DEPARTMENT OF THEORETICAL AND APPLIED MECHANICS UNIVERSITY OF ILLINOIS