Accession Number:

AD0856261

Title:

The Development, Fabrication and Evaluation of Sonic Fatigue Resistant Aerospace Structures Utilizing Viscoelastic Materials.

Descriptive Note:

Final rept. Jul 67-Mar 69,

Corporate Author:

LOCKHEED-CALIFORNIA CO BURBANK

Personal Author(s):

• Lamoree, Maurice D.
• La Barge, William L.
• Prydz, Roland A.

Report Date:

1969-06-01

Pagination or Media Count:

222.0

Abstract:

Results of lap shear, flatwise tension, climbing peel, fatigue, thermal shock, thermal aging and dynamic modulus tests on five viscoelastic materials are presented. Analyses and tests of various joint designs incorporating viscoelastic materials to determine their capability to withstand static tension and compression loads and cyclic axial and bending loads are given. Sonic fatigue analyses and tests of panels of conventional design, panels containing a constrained layer of viscoelastic material and conventional panels with multiple layer, alternately anchored dampers are included. Author

Descriptors:

• *SONIC FATIGUE
• JET AIRCRAFT
• SANDWICH PANELS
• VISCOELASTICITY
• PERFORMANCE(ENGINEERING)
• AIRCRAFT PANELS
• STRUCTURAL PROPERTIES
• MANUFACTURING
• TEST METHODS
• SHEAR STRESSES
• TENSILE PROPERTIES
• ADHESION
• THERMAL SHOCK
• DAMPING
• ELASTIC PROPERTIES
• RESONANT FREQUENCY
• JOINTS
• RESPONSE
• LOADS(FORCES)
• FAILURE(MECHANICS)
• LIFE EXPECTANCY(SERVICE LIFE)

Subject Categories:

• Aircraft
• Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE