Accession Number:

ADA175264

Title:

Strain Dependent Damping Characteristics of a High Damping Manganese-Copper Alloy

Descriptive Note:

Master's thesis 8 Feb-30 Sep 1986

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1986-09-01

Pagination or Media Count:

143.0

Abstract:

Measurement techniques for the determination of strain-dependent damping characteristics of materials in an air environment are being investigated. The material is a high damping manganese-copper alloy called sonoston. The measurement techniques employ cantilevered flat beam specimens in bendings and cylindrical specimens in torsion. The specimens were subjected to three different heat and aging treatments. Pure random and sinusoidal sweep excitations are used as an excitation source in the frequency range of 20 to 500 HZ. Miniature accelerometers and strain gages were mounted on specimens to obtain both input excitation and output responses. The results of the investigation are presented graphically as damping factor vs. resonant frequency, damping factor vs. strain, damping factor vs. input acceleration, strain vs. resonant frequency, strain vs. input acceleration, and input acceleration vs. resonant frequency.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE