Accession Number : AD0815019

Title :   TAPERED-BAND CONFIGURATIONS FOR SURFACE DAMPING. PART I: ANALYSIS. PART II: PRELIMINARY EXPERIMENTAL STUDIES.

Descriptive Note : Summary rept. Jun-Sep 65,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF AERONAUTICS AND ENGINEERING MECHANICS

Personal Author(s) : Warner,William H. ; Cain,Patrick ; Smith,James D.

Report Date : FEB 1967

Pagination or Media Count : 47

Abstract : Work is extended to the study of tapered bands as unit elements in the stacked-band configuration. The tapered-band configuration leads to damping results similar to the straight-band results of Lazan, et.al., with a somewhat more compact stacking arrangement. Analysis of the tapered-band unit is much more complex than that for the straight-band unit. Comparison of the resulting theory with the straight-band theory and with experiment is given. Using a previously designed multiple straight-band surface treatment as a model, several new multiple-band configurations were designed having constraining layers with tapered cross-sections. From these various designs one was chosen as the test specimen. To examine this treatment, it was attached to the flexplate of a large pendulum assembly, which was then set into oscillatory motion. The rate of decay of the motion was measured and used to determine the damping characteristics of the applied treatment.

Descriptors :   (*DAMPING, DIFFERENTIAL EQUATIONS), (*STRUCTURES, DAMPING), ASYMPTOTIC SERIES, STRESSES, SHEAR STRESSES, STRAIN(MECHANICS), VISCOELASTICITY, HYPERGEOMETRIC FUNCTIONS, LAMINATES

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE