Title

Interface Damping At Riveted Joints. Part I - Theoretical Analysis

Date

1961

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

ASD TR 61-467 Part I

Creator

Mead, D. J.

Eaton, D. C. G.

Corporate Author

Southampton Univ (United Kingdom)

Identifier

AD0270463

AD0270463

Distribution Classification

1

DTIC Record Exists

No

Distribution Change Authority Correspondence

AFML LTR

Report Availability

Full text available

Date Issued

1961-09

Abstract

In this paper a theoretical examination is made of potential structural damping increments that could be obtained by insertion of a linear visco-elastic interfacial layer between plates of riveted joints. Consideration is given to a lap joint having anti-symmetry about its single rivet, and being subjected to harmonic longitudinal loading. Certain simplifying assumptions have been 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 energy dissipation has been computed for a wide range of joint dimensions, dynamic properties of the layer, and rivet stiffnesses. It has been 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. It is shown that the elastic deformation of the plates has a significant effect only when high values of rivet stiffness the energy dissipation may be found to a sufficient degree of accuracy by neglecting altogether the plate flexibility.

Publisher

Wright-Patterson Air Force Base, Ohio : Aeronautical Systems Division, Air Force Systems Command, United States Air Force

Date Modified

Scanned by request 11/2/2018 submitted by Vignan's LARA Institute of Technology & Science (University - International)

Extent

41

Laboratory

Directorate of Materials and Processes

Contract

AF 61(052)-332

DoD Project

7351 - Metallic Materials

DoD Task

73521 - Behavior of Metals

Distribution Conflict

No

Access Rights

ASTIA release to OTS not authorized.

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource