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Deformation Measurements of Randomly Rough Surfaces
University of Florida, USA.ORCID iD: 0000-0002-2473-9171
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2017 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 65, no 4, article id 123Article in journal (Refereed) Published
Abstract [en]

Measurements of surface deformations as part of the “Contact Mechanics Challenge” were collected using digital image correlation (DIC). For these experiments, a scaled version (1000×) of the periodic and random roughness surface provided for the “Contact Mechanics Challenge” was used. A 100 mm × 100 mm scale replica of the surface, approximately 10 mm thick, was 3D-printed using an opaque polymethylmethacrylate and pressed into contact against flat, transparent polydimethylsiloxane (PDMS) sheets with dead weight loads. Four different formulations of PDMS were used, and the resulting elastic moduli ranged from 64 kPa to 2.1 MPa. The DIC technique was used in situ to measure the deformation of the PDMS surface at each load increment from 22.5 to 450 N. Surface deformations in and out of contact were measured across the entire apparent area of contact and overlaid with the measurements of contact area to provide a complete description of the surface profile during loading. A direct comparison between these experiments and the simulations regarding the gap within the contact at a reduced pressure of 0.164 agrees to within ±10% when normalized to the maximum gap. 

Place, publisher, year, edition, pages
Springer Science and Business Media, LLC , 2017. Vol. 65, no 4, article id 123
Keywords [en]
Contact Mechanics Challenge, Mechanics, Rough surfaces, 3D printers, Microchannels, Polydimethylsiloxane, Scales (weighing instruments), Silicones, Surface measurement, Contact Mechanics, D. digital image correlation (DIC), Deformation measurements, Polydimethylsiloxane PDMS, Randomly rough surfaces, Surface deformation, Surface profiles, Deformation
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:ri:diva-56330DOI: 10.1007/s11249-017-0901-1Scopus ID: 2-s2.0-85028344067OAI: oai:DiVA.org:ri-56330DiVA, id: diva2:1591307
Available from: 2021-09-06 Created: 2021-09-06 Last updated: 2023-05-23Bibliographically approved

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Harris, Kathryn L

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