29 April 2003 Investigation of propagation and pulsation of slip band using dynamic DSPI
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Proceedings Volume 5058, Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002; (2003) https://doi.org/10.1117/12.509762
Event: Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002, 2002, Beijing, China
Abstract
The phenomena of Portevin-Le CHaltelier (PLC) band propagation and its pulsation were investigated by using dynamic digital speckle pattern interferometry (DSPI). Pulsation of fringe density in the inside of the slip band accompanying with the serrations of load curve was observed. When the load falls in the serrations, the slip deformation happens just like an avalanche, and the specimen takes a shrinkage deformation in the outside of the slip band to compensate the elongation deformation in slip band, even for a tensile test. The maximum elongation in the slip band causing by the avalanchine slip is about 7.6 μm.
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Qingchuan Zhang, Xiaoping Wu, "Investigation of propagation and pulsation of slip band using dynamic DSPI", Proc. SPIE 5058, Optical Technology and Image Processing for Fluids and Solids Diagnostics 2002, (29 April 2003); doi: 10.1117/12.509762; https://doi.org/10.1117/12.509762
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