著者

中西 不二夫

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集 (ISSN:00290270)

巻号頁・発行日

vol.18, no.75, pp.44-46, 1952-11-25

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The criterion for rupture of brittle materials like cast iron is σ=σ_B, where, σ is mean value of normal tensile stress on the surface of rupture ; the mean is generally a weighted mean, the effectiveness to the load being taken into account, and σ_B is ultimate tensile strength. The strength, when a rotating disk of brittle material bursts in a diametral section under centrifugal force, can be obtained from the same condition, σ being, in this case, the ordinary average value. For ductile materials the condition of strength may be put σ=σ_B', where, σ_B'is tensile strength under uniform stress, or in this case the strength of a rotating ring. The strength calculated from this condition was compared with experiments hitherto carried out.