Accumulating displacement fields from different steps in laser or white-light speckle methods

C. A. Shao; H. J. King; Yeon-Kang Wang; Fu-Pen Chiang

doi:10.1117/12.49503

1 December 1991 Accumulating displacement fields from different steps in laser or white-light speckle methods

C. A. Shao, H. J. King, Yeon-Kang Wang, Fu-Pen Chiang

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49503
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Due to the restriction of the upper bound for fringe visibility, the large deformation and nonlinear problem can not be solved by the experimental method of laser or white light speckle photography directly. The applied load may have to be divided into several intervals. Recording the double-exposure specklegram for each loading inerval, the displacement field can be constructed by point-wise or whole field method. A multiquadric surface function is employed to accumulate the displacement components. A new approach to treat the nonlinear experimental problems is proposed.

Citation Download Citation

C. A. Shao, H. J. King, Yeon-Kang Wang, and Fu-Pen Chiang "Accumulating displacement fields from different steps in laser or white-light speckle methods", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49503

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