Accession Number : ADA302676

Title :   Interlaminar Crack Growth in Fiber Reinforced Composites During Fatigue. Part 3.

Descriptive Note : Final rept.,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS

Personal Author(s) : Wang, S. S. ; Wang, H. T.

PDF Url : ADA302676

Report Date : FEB 1981

Pagination or Media Count : 47

Abstract : Interlaminar crack growth behavior in fiber-reinforced composites subjected to fatigue loading was investigated experimentally and theoretically. In the experimental phase of the study, interlaminar crack propagation rates and mechanisms were detertnined for the cases of various geometrles. laminate parameters and cyclic stress levels. An advanced singular hybrid-stress finite element method was used in conjunction with the experimental results to examine the local crack-tip behavior and to characterize the crack propagation during fatigue. Results elucidate the basic nature of the cyclic delamination damage, and relate the interlaminar crack growth rate to the range of mixed-mode crack-tip stress intensity factors. The results show that crack growth rates to be related directly to the range of the mixed-node cyclic stress intensity factors by a power law relationship. (MM)

Descriptors :   *FIBER REINFORCED COMPOSITES, *CRACK PROPAGATION, *EPOXY COMPOSITES, *DELAMINATION, STRESS ANALYSIS, LAMINATES, FINITE ELEMENT ANALYSIS, LOADS(FORCES), GLASS, HYBRID SYSTEMS, FATIGUE(MECHANICS), FAILURE(MECHANICS), LAMINAR FLOW, CYCLIC LOADS.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE