Accession Number:

AD0653590

Title:

SHEAR MODULUS DETERMINATION IN LAMINATED COMPOSITE MATERIALS.

Descriptive Note:

Technical rept., Jul-Sep 66,

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Whitney,James M.

Report Date:

1967-03-01

Pagination or Media Count:

20.0

Abstract:

The report discusses limitations on two widely used methods of measuring shear modulus of fiber reinforced composites. In particular, it is shown that for certain types of fiber lay-ups neither a plate twisting test nor a torsion tube can be used to measure shear modulus directly. Classical theory of laminated plates and cylindrical shells of the Donnell type provides the basis for these conclusions. Circumstances under which these tests can be used to measure shear modulus directly are also discussed. Author

Descriptors:

• (*LAMINATES
• TEST METHODS)
• (*COMPOSITE MATERIALS
• TEST METHODS)
• SHEAR STRESSES
• SHELLS(STRUCTURAL FORMS)
• REINFORCING MATERIALS
• REINFORCED PLASTICS
• ELASTIC PROPERTIES
• STRAIN(MECHANICS)

Subject Categories:

• Laminates and Composite Materials
• Structural Engineering and Building Technology
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE