Title

Stress Waves in a Laminated Medium Generated by Transverse Forces

Date

1969

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

AFML TR 69-120

Creator

Voelker, Leonard E.

Achenbach, Jan D.

Corporate Author

Northwestern University

Laboratory

Air Force Materials Laboratory

Extent

42

Identifier

AD0860372

Access Rights

Export Controls

Distribution Classification

1

Contract

F33615-68-C-1290

DoD Project

7351 - Metallic Materials

DTIC Record Exists

No

Distribution Change Authority Correspondence

AFML USAF LTR

Distribution Conflict

No

Abstract

A laminated medium composed of alternating layers of two homogeneous isotropic elastic solids is suddenly subjected to a spatially uniform distribution of transverse forces, which are applied in a plane normal to the layering. The resulting two-dimensional transient wave propagation problem is analyzed by means of modal analysis. The normal and shear stresses at the interfaces are expressed as infinite integrals which are integrated numerically for not too large values of time. For larger values of time, the integrals are approximated by the method of stationary phase. The predominant contribution to the interface shear stress comes from the head-of-the-pulse approximation. The normal stress at the interface, which is composed of several contributions, is oscillatory, and the interface bonds may thus be subjected to tensile stresses.

Report Availability

Full text available

DoD Task

735106 - Behavior of Metals

Date Issued

1969-08

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource