Accession Number : AD0764045

Title :   Crack Propagation Studies in Brittle Materials.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Freiman,S. W. ; Mulville,D. R. ; Mast,P. W.

Report Date : 03 JUL 1973

Pagination or Media Count : 20

Abstract : An analysis was made of cantilever-beam specimens subjected to end loads and moments for use in crack propagation studies. Included in this analysis were the effects of a plastic zone at the crack tip, beam rotation, and the viscoelastic response of the material. This analysis showed that application of a bending moment to the specimen rather than an end load provides a test in which the strain energy release rate is independent of crack length. Other advantages of this test configuration are that corrections for both shear and beam-rotation effects are not necessary. Results of this test on both glass and ceramics are reported. (Author)

Descriptors :   (*CERAMIC MATERIALS, CRACK PROPAGATION), BRITTLENESS, GLASS, FRACTURE(MECHANICS)

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE