NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
An evaluation of the +/-45 deg tensile test for the determination of the in-plane shear strength of composite materialsThe applicability of the +/-45 deg tensile test for the determination of the in-plane shear strength of advanced composite laminates is studied. The assumptions used for the development of the shear strength formulas were examined, and factors such as the specimen geometry and stacking sequence were assessed experimentally. It was found that the strength of symmetric and balanced +/-45 deg laminates depends primarily upon the specimen thickness rather than the specimen width. These findings have important implications for the +/-45 deg tensile test which is recommended by several organizations for the determination of the in-plane shear stress/strain response and the shear strength of continuous fiber reinforced composites. Modifications to the recommended practices for specimen selection and shear strength determination are suggested.
Document ID
19920050246
Document Type
Conference Paper
Authors
Kellas, S. (NASA Langley Research Center Hampton, VA, United States)
Morton, J. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Jackson, K. E. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
COMPOSITE MATERIALS
Meeting Information
International Conference on Composite Materials (ICCM/8)(Honolulu, HI)
Funding Number(s)
CONTRACT_GRANT: NAS1-18471
Distribution Limits
Public
Copyright
Other