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ICEM 2001 The 3～(rd) International Conference on Experimental Mechanics

作者： Satoru Toyooka Saitama University Saitama Japan

The phenomena of Portevin-Le Chatelier (PLC) band propagation and its pulsation accompanying the serration of load curve in a tensile test (constant load strain rate: 10-5/s) of aluminum alloy were di

关键词： Portevin-Le Chatelier effect digital speckle pattern interferometry plastic deformation propagation and pulsation

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New multiplexed system for synchronous measurement of out-of-plane deformation and two orthogonal slopes

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Chinese Physics B 2022年第3期31卷 259-264页

作者： Yonghong Wang Xiao Zhang Qihan Zhao Yanfeng Yao Peizheng Yan Biao Wang School of Instrument Science and Opto-electronics Engineering Hefei University of TechnologyHefei 230009China Anhui Province Key Laboratory of Measuring Theory and Precision Instrument Hefei University of TechnologyHefei 230009China

We propose a novel system for synchronous measurement of out-of-plane deformation and two orthogonal slopes using a single camera. The linearly polarized reference beam introduced by an optical fiber interferes with the unpolarized object beam to measure the out-of-plane deformation. A modified Mach–Zehnder interferometer is used to measure the two orthogonal slopes of the out-of-plane deformation. One of the object beams of the Mach–Zehnder interferometer is an unpolarized beam, and the other object beam is split into two orthogonal linearly polarized object beams by a polarizing prism. The two beams are orthogonally polarized. Hence, they will not interfere with each other. The two polarized beams respectively interfere with the unpolarized beam to simultaneously measure the two orthogonal slopes of the out-of-plane deformation. In addition, the imaging lens and apertures are respectively placed in three optical paths to independently control the carrier frequencies and shearing amounts. The effectiveness of this method can be proved by measuring two pressure-loaded circular plates.

关键词： digital speckle pattern interferometry digital shearography simultaneous measurement of displacement and two orthogonal slopes

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