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

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

OSTI ID:6652155

Weller, T

A test program aimed at studying the nonlinear/inelastic response under axial compression across a wide range of angle-ply was graphite-epoxy and boron-epoxy laminates was presented and described. The strength allowables corresponding to the various laminate configurations were defined, and the failure mechanisms which dictate their mode of failure were detected. The program involved two types of specimens for each laminate configuration: compression sandwich coupons and compression tubes. The test results indicate that the coupons perform better than the tubes, displaying considerably high stress-strain allowables and mechanical properties relative to the tubes. Also, it is observed that depending on their dimensions the coupons are susceptible to very pronounced edge effects. This sensitivity results in assigning to the laminate conservative mechanical properties rather than the actual ones.

• Research Organization: Technion-Israel Inst. of Tech., Haifa. Dept. of Aeronautical Engineering
• OSTI ID: 6652155
• Report Number(s): N-78-16101; NASA-CR-145233
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
BORON
CARBON
COMPRESSION STRENGTH
ELEMENTS
EPOXIDES
FAILURES
GRAPHITE
MECHANICAL PROPERTIES
NONLINEAR PROBLEMS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
SEMIMETALS
STRAINS
STRESSES
TUBES