Accession Number:

AD0483689

Title:

BIAXIAL-FRACTURE STRENGTH OF BRITTLE MATERIALS.

Descriptive Note:

Summary rept. 1 May 65-31 Mar 66,

Corporate Author:

DOUGLAS AIRCRAFT CO INC SANTA MONICA CA MISSILE AND SPACE SYSTEMS DIV

Personal Author(s):

Report Date:

1966-03-01

Pagination or Media Count:

136.0

Abstract:

The investigation described herein was conducted to develop an analytical model to accurately predict the biaxial-fracture strengths of brittle materials. A new biaxial-failure criterion has been developed. The new criterion is a flaw-based theory concerned with the influence of spherical and ellipsoidal discontinuities upon the fracture strength of brittle materials. One-hundred and eighteen porous zirconia test specimens were used for the fracture tests. These tests were conducted for uniaxial tension and compression and for two biaxial-stress states in the tension-compression quadrant. A careful analysis was made to develop test conditions that largely circumvented the experimental difficulties encountered by previous investigators. Photoelastic and strain-gage studies were conducted to verify the experimental techniques the results showed that homogeneous stress fields were developed in the gage area of the test specimens. Author

Subject Categories:

  • Ceramics, Refractories and Glass
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE