Title

Study Of Ultrasonic Methods For Nondestructive Measurement Of Residual Stress

Date

1963

Index Abstract

Contrails and DTIC truncated

Photo Quality

Not Needed

Report Number

WADD TR 61-42 Part II

Creator

Rollins, Fred R., Jr.

Jones, Jerry Lee

Kobett, Donald R.

Corporate Author

Midwest Research Institute

Laboratory

Directorate of Materials and Processes

Extent

35

Identifier

AD0299017

AD0299017

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-7058

DoD Project

7360

DoD Task

736002

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Abstract

The study of stress-induced birefringence was continued in both polycrystalline and single crystal experiments.. The effect is explained on the basis of nonlinear elasticity theory. Experiments indicate that dislocation activity does not strongly affect results in polycrystalline specimens, however a pronounced influence may be observed in single crystals.

Nonlinear elasticity theory was used to investigate the interaction of two intersecting, plane, elastic waves in a homogeneous, isotropic medium. A criterion for the occurrence of a strong scattered wave was derived and as formulated as a relationship between the second order elastic constants of the material, and the angle between the intersecting wave vectors, and the ratio of primary wave frequencies. The amplitude of the scattered wave is found to be proportional to the volume of interaction and dependent on the third order elastic constants of the material. Preliminary efforts to experimentally verify the theoretical predictions are described.

Report Availability

Full text available

Date Issued

1963-01

Subject

Stresses

Nondestructive Testing

Birefringence

Ultrasonics

Scattering

Materials

Deformation

Aluminum

Partial Differential Equations

Mechanical Waves

Integral Transforms

Functions (Mathematics)

Silicon Compounds

Phonons

Operators (Mathematics)

Perturbation Theory

Isotropism

Oxides

Theory

Single Crystals

Solids

Steel

Publisher

Wright-Patterson Air Force Base, OH : Directorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command

Distribution Conflict

No

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource