二軸応力を受ける機械要素への銅めっき応力測定法の適用

概要

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In the case of combined loads such as the simultaneous action of cyclic torsion and plane bending acting on the machine element, neither the first nor second principal stress amplitude can be detected by the copper electroplating method of stress analysis because this method utilizes the phenomenon that grown grains appear when the maximum shearing stress amplitude in the deposited layer attains the proper value to the plating. I comment on a unique method adopting copper foil with micro circular holes that enables separation and measurement of the first and second principal stresses in the element subjected to combined loads.