Title

Multiple-Band Surface Treatments for High Damping

Date

1965

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

AFML TR 65-269

Creator

Lazan, B. J.

Metherell, A. F.

Sokol, G.

Corporate Author

University of Minnesota

Laboratory

Air Force Materials Laboratory

Extent

45

Identifier

AD0474549

Access Rights

Export Controls

Distribution Classification

1

Contract

AF 33(615)-1055

DoD Project

7351

DTIC Record Exists

Yes

Distribution Conflict

No

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.

Report Availability

Full text available by request

DoD Task

735106 - Behavior of Metals

Date Issued

1965-09

Provenance

Bombardier/Aero

Type

report

Format

45 pages ; 28 cm.