Estimating the yield stress of soft materials via laser-induced breakdown spectroscopy
Taking three typical soft samples prepared respectively by loose packings of 77-, 95-, and 109-μm copper grains as examples, we perform an experiment to investigate the energy-dependent laser-induced breakdown spectroscopy (LIBS) of soft materials. We discovered a reversal phenomenon in the trend of...
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Published in | Chinese physics B Vol. 33; no. 3; pp. 34211 - 34215 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Chinese Physical Society and IOP Publishing Ltd
01.03.2024
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Subjects | |
Online Access | Get full text |
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Summary: | Taking three typical soft samples prepared respectively by loose packings of 77-, 95-, and 109-μm copper grains as examples, we perform an experiment to investigate the energy-dependent laser-induced breakdown spectroscopy (LIBS) of soft materials. We discovered a reversal phenomenon in the trend of energy dependence of plasma emission intensity: increasing initially and then decreasing separated by a well-defined critical energy. The trend reversal is attributed to the laser-induced recoil pressure at the critical energy just matching the sample’s yield strength. As a result, a one-to-one correspondence can be well established between the samples’ yield stress and the critical energy that is easily obtainable from LIBS measurements. This allows us to propose an innovative method for estimating the yield stress of soft materials
via
LIBS with attractive advantages including
in-situ
remote detection, real-time data collection, and minimal destructive to sample. |
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ISSN: | 1674-1056 2058-3834 |
DOI: | 10.1088/1674-1056/ad12a9 |