反射型レーザ光弾性実験装置の測定値に与える材料表面からの反射光の影響

概要

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The reflection type laser photoelasticity that possesses high detection sensitivity on the birefringence measurement was developed to detect the stress of the film formed on the surface of a board. The magnitudes of principal stress difference and the directions of the principal stresses were obtained simultaneously and quantitatively using the developed equipment. However, in this type of photoelasticity, measurement error arises from the light reflected by the sample surface. In order to examine the effect of this surface reflection, the stress measurement of the stressed glass elates with the aluminum deposition on a side was carried out. The load of the 4 point bending moment was applied to the grass plates. The laser light penetrates the glass, is reflected on the aluminum, and returns. From this reflected light, the stress of the glass was measured. The reflected light intensity was adjusted by changing the thickness of the deposited aluminum. The result of the experiment showed that surface reflection has influence on the measurement. And, the calculation method which removed the effect of surface reflected light was examined.
一般社団法人日本機械学会の論文
2003-02-25