Improvement of the Method of Measuring Shear Strain Using Interferometry of Diffraction Beams

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概要

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• In measuring in-plane deformation by using diffraction beams, fringes corresponding to contour lines of various strain components can be obtained. Measurement of normal strain (or the first order derivative of displacement) is rather simple, and the authors reported on the method for it already. In this paper a new method of measuring shear strain is proposed, in which a modified Sciammarella's optical system (1967) is used and the double exposure processing is applied. In this method sensitivity in measurement is twice that of the recent moire method using diffraction beams, or 6 times that of the conventional moire method using interference of grating lines. Further, errors in moire fringes due to mis-adjustment of an optical system, non-uniformity of thickness of film (specimen grating), etc. are compensated almost completely.

• 一般社団法人日本機械学会の論文

著者

• Kato Kazunori

  Faculty Of Engineering Tokyo Institute Of Technology

• Murota Tadao

  Faculty Of Engineering Miyazaki University

• KUMAMOTO Yukio

  Nissan Motor Car Co., Ltd.

• Kumamoto Yukio

  Nissan Motor Car Co. Ltd.

関連論文

• Some Investigations on the Methods of Measuring 3-Dimensional Plastic Deformations by Laser
• Analysis of Temperature Distribution in Caliber Rolling of a Bar
• Analysis of Rolling of Bars by the Energy Method Using Finite Element Division : (Analysis of Square-Oval Pass)
• Analysis of Rolling of Angles by Energy Method Using Finite Element Division : Solid-Mechanics, Strength of Materials
• Analysis of Rolling of Bars by the Energy Method Using Finite Element Division
• Improvement of the Energy Method Using Finite Element Division and Application to Flat-rolling
• On the Method of Measuring Strain by Use of Diffraction at Mis-matched Moire Fringes
• Improvement of the Method of Measuring Shear Strain Using Interferometry of Diffraction Beams

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