アルミニウム薄膜の疲労すべり変形を利用した疲労ゲージに関する基礎的研究 : 第1報、単軸応力下におけるすべり線発生および表面粗さの増加

概要

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Fundamental characteristic of slip initiation and surface roughening phenomena in aluminum foil during the fatigue process are investigated under constant amplitude stressing. Applicability of the foil to the fatigue gauge that utilizes these phenomena to detect fatigue damage is discussed. It is found that the slip initiation phenomenon in aluminum foil is easily observed by an optical microscope and that the effects of temperature and cyclic speed on the slip initiation are quite small. Accordingly, aluminum foil can be used as the fatigue gauge that utilizes the slip initiation phenomenon. It is also found that evolution of surface roughness caused by the slip deformation is dependent on cyclic stress and the number of cycles. Therefore, this phenomenon also enables use of the foil as the fatigue gauge that makes use of surface roughness. Measuring accuracy of stress by this foil is about 5 MPa, and in-process measurements of cyclic strains or fatigue damage can be practicable provided that non-contact surface roughness measurement is adopted.
一般社団法人日本機械学会の論文
1989-12-25