Accession Number:

AD0270463

Title:

INTERFACE DAMPING AT RIVETED JOINTS. PART I-THEORETICAL ANALYSIS

Descriptive Note:

Corporate Author:

SOUTHAMPTON UNIV (UNITED KINGDOM)

Personal Author(s):

• MEAD, D.J.
• EATON, D.C.G.

Report Date:

1961-09-01

Pagination or Media Count:

1.0

Abstract:

A theoretical examination is made of potential structural damping increments obtainable by insertion of a linear visco-elastic interfacial layer between plates of riveted joints. Consideration is given to a lap joint having antisymmetry about its single rivet, and being subjected to harmonic longitudinal loading. Certain simplifying assumptions were made which effectively reduce the analysis to a one dimensional system. An expression is obtained for the energy dissipated in the layer per cycle of load. The magnitude of this dissipation was computed for a wide range of joint dimensions, dynamic properties of the layer, and rivet stiffnesses. It was found that as the thickness or shear modulus of the layer is varied, a maximum value of the energy dissipation occurs. The conditions for this maximum are examined, and a simple design rule is established whereby the maximum damping may be achieved in a joint using a given material. Author

Descriptors:

• *DAMPING
• *JET FLOW
• *JOINTS
• *RIVETED JOINTS
• ACOUSTIC WAVES
• ACOUSTIC INSULATION
• AIRCRAFT
• AIRFRAMES
• DEFORMATION
• ELASTIC PROPERTIES
• VIBRATION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE