NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Scale effects in the response and failure of fiber reinforced composite laminates loaded in tension and in flexureThe feasibility of using scale model testing for predicting the full-scale behavior of flat composite coupons loaded in tension and beam-columns loaded in flexure is examined. Classical laws of similitude are applied to fabricate and test replica model specimens to identify scaling effects in the load response, strength, and mode of failure. Experiments were performed on graphite-epoxy composite specimens having different laminate stacking sequences and a range of scaled sizes. From the experiments it was deduced that the elastic response of scaled composite specimens was independent of size. However, a significant scale effect in strength was observed. In addition, a transition in failure mode was observed among scaled specimens of certain laminate stacking sequences. A Weibull statistical model and a fracture mechanics based model were applied to predict the strength scale effect since standard failure criteria cannot account for the influence of absolute specimen size on strength.
Document ID
19930040320
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jackson, Karen E.
(U.S. Army, Aerostructures Directorate; NASA, Langley Research Center Hampton, VA, United States)
Kellas, Sotiris
(Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Morton, John
(Virginia Polytechnic Inst. and State Univ. Blacksburg, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Journal of Composite Materials
Volume: 26
Issue: 18
ISSN: 0021-9983
Subject Category
Structural Mechanics
Accession Number
93A24317
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available