Effects of truncation of a predominantly compression load spectrum on the life of a notched graphite/epoxy laminateConstant amplitude and transport wing spectrum compressive loading tests were used to explore the fatigue behavior of a notched, graphite/epoxy T300/5208 laminate specimen. Results indicate that (1) the amount of buckling near the notch allowed in the tests significantly affected fatigue life; (2) load spectrum truncation at either high or low ends produced lives greater than those obtained for the baseline complete-spectrum test, but with greater impact at the high-load end; and (3) the predictions of the Palmgren-Miner cumulative damage theory were found to always be far longer than those obtained in the spectrum loading tests.
Document ID
19810052733
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Phillips, E. P. (NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Composite Materials
Meeting Information
Meeting: Symposium on Fatigue of fibrous composite materials