Accession Number:

AD0742662

Title:

An Assessment of Factors Influencing Data Obtained by the Photoelastic Stress Freezing Technique for Stress Fields near Crack Tips,

Descriptive Note:

Corporate Author:

VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG COLL OF ENGINEERING

Report Date:

1972-04-01

Pagination or Media Count:

27.0

Abstract:

Factors which influence crack tip stress field data are identified as 1 Non-linear zone near crack tip due to crack blunting. 2 Normal stress parallel to crack surface. 3 Location of region for data retrieval. The Kolosoff-Inglis solution is used in order to assess effects of crack tip blunting. A set of stress freezing photoelastic experiments are conducted on plates containing through cracks and results are compared with the Westergaard solution in order to assess the effect of Item 2 using appropriate Item 3 locations. A data conditioning computer program is employed to yield accurate values of the stress intensity factor from photoelastic data. Author

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE