Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Effect of Lateral Cracks Upon Fracture Toughness Determined by the Surface Crack in Flexure Method

Published

Author(s)

George D. Quinn, J A. Salem

Abstract

The surface crack in flexure method uses a Knoop indenter to create small semi elliptical surface pre cracks in beam specimens. Lateral cracks may interfere with and cause errors in measurements of fracture toughness particularly for materials whose fracture toughness is 3. Mpa{root} of less. The residual stress damage zone is hand ground or polished away after indentation, but the customary amounts may not be sufficient to eliminate lateral cracks in very brittle materials. A simple remedy to detect and solve the problem is described.
Citation
Journal of the American Ceramic Society
Volume
85
Issue
No. 4

Keywords

ASTM, ceramics, fracture toughness, lateral cracks, silicon carbide, surface crack in flexure

Citation

Quinn, G. and Salem, J. (2002), Effect of Lateral Cracks Upon Fracture Toughness Determined by the Surface Crack in Flexure Method, Journal of the American Ceramic Society (Accessed April 24, 2024)
Created April 1, 2002, Updated February 19, 2017