Effects of Structural Heating on the Sonic Fatigue of Aerospace Vehicle Structures
Abstract
The results of an analytic and experimental investigation to identify and determine the influence of effects of structural heating on the dynamic response characteristics of randomly excited aerospace structures and on the combined environment-acoustic fatigue properties of structural components are presented. Thermal and thermal-acoustic tests were conducted on 2024-T81, Ti-6Al-4V and Rene' 41 nickel-base alloy panel specimens. Effects of the temperature increase and sound pressure on the stress response and oil canning of the panels were observed. A semiempirical criterion for predicting oil canning of panels in thermal-acoustic environments was developed. Shaker tests were conducted on 2024-T81 aluminum alloy specimens to determine the effect of the different sequences and combinations of heating and shaker excitation on the fatigue life of the specimens when oil canning is a factor. Elevated temperature fatigue tests under steady-state random (shaker) excitation were also conducted with Ti-6Al-4V titanium alloy and Rene' 41 nickel-base alloy specimens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1974
- Accession Number
- AD0916690
Entities
People
- Marcus J. Jacobson
- Paul E. Finwall