ヘルツの接触厚を考慮した圧裂引張応力

概要

論文の詳細を見る
The diametral compression testing method, in which a simple penny shaped disk is loaded along a diameter until it splits, is convenient for determining the fracture strength of brittle materials. The maximum tensile stress at the center of disk σ_H is derived accurately by considering the Hertzian contact width as follows ; σ_H = {1-1.15(b/R)^2 + 0.22(b/R)^3}σ_P ; σ_P = P/πRt where R, t and b are the radius, thickness and contact half width of the disk specimen, respectively. σ_P is the uniform tensile stress on the loading axis when the disk is compressed by the point force P. Furthermore, the correction in the diametral compressive strength for the effects of stress distribution and specimen volume is considered according to the Weibull's statistical theory, in order to apply this method to practical uses.
社団法人日本材料学会の論文
1978-04-15