Accession Number:

AD0838463

Title:

ACOUSTIC FATIGUE DESIGN INFORMATION FOR FIBER REINFORCED STRUCTURES.

Descriptive Note:

Final technical rept. Apr 67-Jul 68,

Corporate Author:

NORTHROP CORP HAWTHORNE CALIF NORAIR DIV

Personal Author(s):

• Jacobson,Marcus J.

Report Date:

1968-07-01

Pagination or Media Count:

199.0

Abstract:

The results of an analytical and experimental program to develop acoustic fatigue design information on glass and boron fiber reinforced materials are presented. Three aluminum alloy honeycomb panels and fifty-eight honeycomb panels with two ply fiber reinforced facings were fabricated and subjected to acoustic tests under harmonic and random loading. Coupon fatigue tests on S-glass laminates were conducted. A large amount of experimental data is presented. Comparisons of experimental results with theoretical predictions are made, and design guide-lines are presented. It was demonstrated that high quality honeycomb panels with boron and S-glass fiber reinforced facings can be fabricated and will offer greater resistance to acoustic loading than aluminum honeycomb panels of comparable total weight and overall thickness. Author

Descriptors:

• *STRUCTURES
• *REINFORCING MATERIALS
• FATIGUE(MECHANICS)
• HONEYCOMB CORES
• SANDWICH CONSTRUCTION
• ACOUSTIC PROPERTIES
• PANELS
• LAMINATES
• WEIGHT
• LOADS(FORCES)
• BORON
• GLASS
• THICKNESS
• SYNTHETIC FIBERS
• ALUMINUM
• MANUFACTURING

Subject Categories:

• Structural Engineering and Building Technology
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE