Accession Number:

ADA048364

Title:

A General Study of Hybrid Composite Laminates.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

• Brooks,George D.

Report Date:

1977-12-01

Pagination or Media Count:

35.0

Abstract:

This thesis is a general study of hybrid composite laminates that includes application of a three dimensional stress analysis approximation technique based on equilibrium considerations and free edge effects. Thermal residual stresses and effects of replacing lamina in a composite laminate with lamina composed of hybrid material were investigated. Two types of 48 ply hybrid composite laminates were tested under tensile and flexure loading. Results achieved experimentally for the moduli of elasticity were compared with values predicted by laminated plate theory and laminated beam theory. Thermal residual stresses proved to be significant and worthy of due consideration in stress analysis of test specimens. Hybridization, as studied, appeared to have little effect on the overall properties of a laminate. Hybrid composite laminates obey classical laminate theory and can, in certain ply configurations, develop considerable free edge effect stresses. Author

Descriptors:

• *COMPOSITE MATERIALS
• *EPOXY LAMINATES
• *HYBRID SYSTEMS
• COMPUTER PROGRAMS
• AIRCRAFT INDUSTRY
• STRESS ANALYSIS
• BEAMS(STRUCTURAL)
• DEFORMATION
• TENSILE STRESS
• MODULUS OF ELASTICITY
• THESES
• GRAPHITE
• GLASS
• THREE DIMENSIONAL
• APPROXIMATION(MATHEMATICS)
• SHEAR STRESSES
• RESIDUAL STRESS
• FLEXURAL STRENGTH
• THERMAL STRESSES
• FLAT PLATE MODELS

Subject Categories:

• Laminates and Composite Materials
• Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE