Experimental studies of graphite-epoxy and boron-epoxy angle-ply laminates in shear

Technical Report · Thu Sep 01 04:00:00 EDT 1977

OSTI ID:6626794

Weller, T

The nonlinear/inelastic response under in-plane shear of a large variety of graphite-epoxy and boron-epoxy angle-ply laminates was tested. Their strength allowables were obtained and the mechanisms which govern their mode of failure were determined. Two types of specimens for the program were chosen, tested, and evaluated: shear panels stabilized by an aluminum honeycomb core and shear tubes. A modified biaxially compression/tension-loaded picture frame was designed and utilized in the test program with the shear panels. The results obtained with this test technique categorically prefer the shear panels, rather than the tubes, for adequate and satisfactory experimental definition of the objectives. Test results indicate the existence of a so-called core-effect, which ought to be considered when reducing experimental data for weak in shear laminates.

• Research Organization: Technion-Israel Inst. of Tech., Haifa. Dept. of Aeronautical Engineering
• OSTI ID: 6626794
• Report Number(s): N-78-16099; NASA-CR-145231
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
BORON
CARBON
COMPOSITE MATERIALS
ELEMENTS
EPOXIDES
FAILURES
GRAPHITE
HONEYCOMB STRUCTURES
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
NONLINEAR PROBLEMS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SEMIMETALS
SHEAR PROPERTIES
STRESS ANALYSIS
TUBES