Accession Number : AD0771796
Title : A Study of Fracture Phenomena in Fiber Composite Laminates. Volume III.
Descriptive Note : Final rept. 1 Nov 71-31 Aug 73,
Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MECHANICAL ENGINEERING
Personal Author(s) : Konish,H. J. , Jr. ; Cruse,T. A.
Report Date : SEP 1973
Pagination or Media Count : 126
Abstract : The extension of linear elastic fracture mechanics from ostensibly homo-geneous isotropic metallic alloys to heterogeneous anisotropic advanced fiber composites is considered. It is analytically demonstrated that the effects of material anisotropy do not alter the principal characteris-tics exhibited by a crack in an isotropic material. The heterogeneity of fiber composites is experimentally shown to have a negligible effect on the behavior of a sufficiently long crack. A method is proposed for predicting the fracture strengths of a large class of composite laminates; the values predicted by this method show good agreement with limited experimental data. The limits imposed by material heterogeneity are briefly discussed, and areas for further study are recommended. (Author-PL)
Descriptors : *Composite materials, Laminates, Fracture(Mechanics), Stresses, Fibers, Anisotropy
Subject Categories : Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE