Weibull Effective Volumes and Surfaces for Cylindrical Rods Loaded in Flexure

Published

January 1, 2003

Author(s)

George D. Quinn

Abstract

Formulas are given for the effective volumes and effective surfaces for cylindrical rods loaded in flexure. Strength scaling for specimen size usually depends upon whether the flaws are volume or surface distributed. Flexural loadings of rods of constant diameter are an unusual exception. The ratio of 3-poing flexural strengths to 4-point flexural strengths is dependent of whether the flaws are volume or surface distributed. Rods tested in flexure do not expose much material to the maximum stresses. Large rods produce comparable strengths to common standard sized rectangular bend bars for volume flaws. For surface flaws, smaller rectangular bar specimens actually have larger effective surfaces.

Citation

Journal of the American Ceramic Society

Volume

86

Issue

Issue 3

Pub Type

Journals

Keywords

effective surface, effective volume, flexureal strength, silicon nitride, Weibull

Citation

Quinn, G. (2003), Weibull Effective Volumes and Surfaces for Cylindrical Rods Loaded in Flexure, Journal of the American Ceramic Society (Accessed June 2, 2023)