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Subsurface microtunneling in ductile material caused by multiple droplet impingement at subsonic speeds
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SYSNO ASEP 0555114 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Subsurface microtunneling in ductile material caused by multiple droplet impingement at subsonic speeds Tvůrce(i) Hloch, Sergej (UGN-S) RID, SAI, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Svobodová, J. (CZ)
Hromasová, M. (CZ)
Müller, M. (CZ)Celkový počet autorů 5 Číslo článku 204176 Zdroj.dok. Wear. - : Elsevier - ISSN 0043-1648
Roč. 490-491, February 2022 (2022)Poč.str. 13 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova hydrodemolition ; periodic water impingement ; lateral flow ; subsurface erosion ; transient cavities ; blind cavities ; pulsating water jet ; fractal erosion patterns ; hydraulic penetration Vědní obor RIV JR - Ostatní strojírenství Obor OECD Mechanical engineering CEP LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UGN-S - RVO:68145535 UT WOS 000754298000001 EID SCOPUS 85120326860 DOI 10.1016/j.wear.2021.204176 Anotace This article deals with the analysis of the subsurface deformation effects of materials due to the periodic action of liquid droplets, each with a constant volume of approximately 36 mm(3) distributed with a spatial frequency of 20,000 i/mm. Sample grooves were analyzed within standoff distances where the prevailing mechanism is acceleration culmination depletion using the stair trajectory to avoid a possible Doppler effect. Using X-ray mu-CT, a network of cavities corresponding to a fractal shape was identified below the surface. It is apparent that the ability to erode does not end with the formation of a groove but continues into the core of the material in the form of microjetting, tunneling, or piercing. From that perspective, two types of these cavities have been identified, blind and transient, with diameters of a few micrometers. The topological changes in the subsurface region of the sample were analyzed using X-ray tt-CT progressive sectioning. The anticipated subsurface deformation was further explored and analyzed using SEM analysis. The integrity of the material around the cavities was assessed according to microhardness to explain the microjetting, tunneling, and piercing propagation. The results suggest that the effect of the lateral jetting after droplet collapsing causes extensive hydrodynamic tunneling in the material that is much higher during the intense periodic action of water droplets, even at subsonic speeds. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2023 Elektronická adresa ttps://reader.elsevier.com/reader/sd/pii/S0043164821005597?token=92436CDCC65473A199B70C2D6D7DC0D776F87E1C4A9418AE2F42DA1EA4D578329AEEF1DEAD1443F6E0B23FC53EF80A6E&originRegion=eu-west-1&originCreation=20220425120439
Počet záznamů: 1