Abstract
The criterion for rupture of brittle materials like cast iron is σ=σB, 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 σB 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=σB', where, σB'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.
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More From: Transactions of the Japan Society of Mechanical Engineers
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