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An experimental and analytical investigation of the rail shear-test method as applied to composite materialsThis report presents the results from an experimental and analytical investigation of the stress distributions occurring in a rail shear test. The effects of non-uniform stresses induced by differential thermal expansion, rail flexibility and specimen aspect ratio on measured shear modulus and ultimate strength of composite laminates are shown. A two-dimensional linearly elastic finite element model was used to analytically determine how various geometric parameters influenced the magnitude and distribution of inplane normal and shear stresses in a tensile rail shear specimen. Rail shear tests were conducted at room temperature and 589 K (600 F) on selected graphite-polyimide composite laminates using two titanium rail configurations. The analysis and test methods are discussed, and the results of the effects of the various parameters on shear modulus and ultimate strength are presented.
Document ID
19800026038
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Garcia, R.
(NASA Langley Research Center Hampton, VA, United States)
Mcwithey, R. R.
(NASA Langley Research Center Hampton, Va., United States)
Weisshaar, T. A.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 10, 2013
Publication Date
May 1, 1979
Subject Category
Composite Materials
Meeting Information
Meeting: Spring Meeting
Location: San Francisco, CA
Start Date: May 20, 1979
End Date: May 25, 1979
Sponsors: Society for Experimental Stress Analysis
Accession Number
80A10208
Distribution Limits
Public
Copyright
Other

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