Accession Number : AD0724146

Title :   Free Edge Effects in the Measurement of Composite In-Plane Shear Properties.

Descriptive Note : Technical rept. Jun-Sep 70,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Whitney,James M.

Report Date : FEB 1971

Pagination or Media Count : 27

Abstract : A Fourier series solution is obtained for the stresses in a symmetrically laminated orthotropic plate subjected to a uniform tangential displacement along one edge with the opposite edge clamped and the two adjacent edges stress-free. These are essentially the edge conditions imposed by the rain shear test. Results can also be applied to the determination of stresses in a certain class of bonded double lap joints. Numerical examples show the shear stress distribution to be a function of various in- plane stiffness ratios and the dimensions of the plate. In addition, normal stresses of large magnitude are found in the corners. Theoretical results are qualitatively verified on fiber reinforced rubber composites. (Author-PL)

Descriptors :   (*COMPOSITE MATERIALS, SHEAR STRESSES), (*LAMINATES, SHEAR STRESSES), REINFORCED PLASTICS, RUBBER, TEST METHODS, BOUNDARY VALUE PROBLEMS, FOURIER ANALYSIS, SERIES(MATHEMATICS)

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE