Abstract
The experimental analysis of torsional stress is discussed, where the surface stresses of the bars with uniform section of various cross section as well as the bars of stepwise varying section are shown. As the sum of both principal stresses, σ1 and σ2, must be zero on the surface of the twisted bars, we can find the magnitudes of σ1 and σ2, to say nothing of their directions, the value of σ1-νσ2 (ν=Poisson's ratio) being obtained by the density of cracks on coating.
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More From: Transactions of the Japan Society of Mechanical Engineers
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