Accession Number : AD0474549


Title :   MULTIPLE-BAND SURFACE TREATMENTS FOR HIGH DAMPING


Descriptive Note : Rept. for Jan 1964-Jul 1965


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


Personal Author(s) : Lazan, B J ; Metherell, A F ; Sokol, G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/474549.pdf


Report Date : Sep 1965


Pagination or Media Count : 57


Abstract : Conventional damping tapes, consisting of one or more adhesive layers constrained by relatively rigid bands, do not have sufficient damping for many applications. Considerable improvement can be realized in a multiple- band configuration in which alternate bands are rigidly anchored on opposite sides of the configuration. The energy dissipation in such a configuration is analyzed considering both short (rigid) bands and long (elastic) bands. General relations are derived between the configuration properties in terms of the equivalent elastic modulus and the effective loss modulus and a parameter which includes the material properties and the configuration geometry. Test configurations were made and tested. Experimental results are in excellent agreement with the theory. Both the theory and experimental results indicate that this new configuration is capable of dissipating very large damping energy, significantly higher than conventional surface treatments. (Author)


Descriptors :   *DAMPING , *TAPES , MECHANICAL PROPERTIES , LAMINATES , STRUCTURES , ELASTIC PROPERTIES , STRAIN(MECHANICS) , SHEAR STRESSES , MACHINES , MULTIPLE OPERATION , ADHESIVE TAPES


Subject Categories : Miscellaneous Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE