Accession Number : AD0687161

Title :   FRACTURE DYNAMICS - A PHOTOELASTIC INVESTIGATION.

Descriptive Note : Technical rept.,

Corporate Author : WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Bradley,W. B. ; Kobayashi,A. S.

Report Date : APR 1969

Pagination or Media Count : 41

Abstract : Isochromatic patterns associated with dynamic brittle crack propagation were recorded by means of a modified Schardin multiple-spark-gap, dynamic polariscope for 10 x 10 inch edge crack panels. With the material properties determined by dynamic calibration, the resulting photoelastic information was used to evaluate the elastic fields surrounding the propagating crack by the semi-inverse technique. This solution was characterized by the dynamic stress intensity factor whose behavior was determined for accelerating, constant velocity, and arresting cracks. (Author)

Descriptors :   (*FRACTURE(MECHANICS), CRACK PROPAGATION), (*CRACK PROPAGATION, *PHOTOELASTICITY), CALIBRATION, STRESSES, STRAIN(MECHANICS), REAL TIME, HIGH SPEED PHOTOGRAPHY, INTERFERENCE, OPTICAL EQUIPMENT, INSTRUMENTATION, MATHEMATICAL MODELS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE