Photoelastic Analysis with a Single Tricolor Image

A new approach to simultaneous measurement of isochromatics and isoclinics from a single image using a tricolor light, called as the tricolor photoelastic technique, is proposed in order to enable and facilitate the analysis of time varying phenomena. Not only an apparatus of experiment but the whole analysis system and procedure are developed. Using a color digital camera and a tricolor light source under linear polarization, fringe order and the principal direction of birefringence are obtained from a piece of color image data by a single shot using the method proposed. It is emphasized that this method can be applicable to time varying phenomena in which good repeatability and reproducibility of experiments are not expected, since multiple exposures are not necessary for sufficient data acquisition in the completion of stress analysis.

[1]  G. Cloud,et al.  On dispersion of birefringence of photoelastic materials , 1966 .

[2]  W. F. Riley,et al.  Experimental stress analysis , 1978 .

[3]  S Barone,et al.  Automated photoelasticity in white light: Influence of quarter-wave plates , 1995 .

[4]  K. T. Ramesh,et al.  Three fringe photoelasticity ‐ use of colour image processing hardware to automate ordering of isochromatics , 1996 .

[5]  Y. Seguchi,et al.  Computer-aided fringe-pattern analyzer—A case of photoelastic fringe , 1979 .

[6]  Satoru Yoneyama,et al.  Photoviscoelastic Stress and Strain Analysis around a Surface Groove under Rolling Contact Load , 1997 .

[7]  Eann A. Patterson,et al.  Towards full field automated photoelastic analysis of complex components , 1991 .

[8]  Y. Miyano,et al.  Photoviscoelastic analysis by use of polyurethane rubber , 1969 .

[9]  C. P. Burger,et al.  Half-fringe photoelasticity: A new approach to whole-field stress analysis , 1983 .

[10]  Alex S. Redner.  Photoelastic measurements by means of computer-assisted spectral-contents analysis , 1985 .

[11]  Masahisa Takashi,et al.  A NEW COMPUTER-AIDED SYSTEM FOR PHOTOELASTIC STRESS ANALYSIS WITH STRUCTURE-DRIVEN TYPE IMAGE PROCESSING , 1990 .

[12]  Sandro Barone,et al.  Towards RGB photoelasticity: Full-field automated photoelasticity in white light , 1995 .

[13]  Steve Haake,et al.  Photoelastic analysis of frozen stressed specimens using spectral-contents analysis , 1992 .

[14]  T. R. Judge,et al.  Photoelasticity stress analysis using carrier fringe and FFT techniques , 1993 .

[15]  Y. Morimoto,et al.  Separation of isochromatics and isoclinics using Fourier transform , 1994 .