Accession Number:

AD0756260

Title:

A Dynamic Photoelastic Analysis of Stress Waves from Inclined Line Sources

Descriptive Note:

Semi-annual technical rept.

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING

Report Date:

1972-10-15

Pagination or Media Count:

100.0

Abstract:

Dynamic photoelastic methods were employed to analyze the stresses produced in models of a bench face. The dynamic loading was accomplished with a uniformly distributed line charge which was inclined to the vertical face. The angle of inclination of the line charge was selected so that the front of either the S or P wave would be parallel to the vertical boundary of the bench face. The dynamic event was divided into several phases which included The incident portion where the strain energy is carried to the bench face by means of the P wave and later by the S wave the first reflection period where the P wave reflects from the vertical boundary the interaction period where the reflected PP and PS waves reinforce the incoming S wave the second reflection period where the S wave reflects from the vertical bench face and finally the crack propagation period where cracks initiated at the line charge propagate into the field of the model.

Subject Categories:

  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE