Accurate measurement of composite laminates deflection using digital speckle pattern interferometry |
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Authors: | Guoqing Gu Kaifu WangKeyin Zhou Xing Xu |
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Institution: | College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract: | The modern digital speckle pattern interferometry (DSPI) technique is applied for the accurate measurement of the full-field deflection distribution of a bent composite laminates. Two kinds of powerful phase-shifting methods, phase of differences method (PDM) and difference of phases method (DPM), are described briefly and employed in DSPI to quantitatively extract the phase information, respectively. A comparison of the deflection distributions measured by DPM and PDM indicates that the former has a better measurement accuracy than the latter in laminate's static test experiment. |
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Keywords: | Composite laminate deflection DSPI Phase-shifting method PDM DPM |
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