Experimental Investigation of the Elastic–Plastic Contact Area and Static Friction of a Sphere on Flat

Etsion, I.; Levinson, O.; Halperin, G.; Varenberg, Michael

doi:10.1115/1.1843834

Cited by 51 publications

(33 citation statements)

References 12 publications

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“…Sintered carbides were used as rigid flat specimens. Axial compression tests of softer specimens were performed at different normal loads, up to 1000 N, with load increment of 100 N. During copper specimens testing, in addition, for load smaller than 200 N, load increment was 20 N. Similar to works [18,19,20] load was applied for 30 seconds and removed. Normal force was applied by bolted joint of 65 mm diameter and 0.55 mm pitch.…”

Section: Methodsmentioning

confidence: 99%

“…Although spherical contact problem has been studied extensively earlier (see for example [6]), experimental research of deformable sphere contact with a hard flat were carried out also lately which is connected presumably with development of measuring equipment In works [18,19,20] the residual contact trace was measured non-in situ. Etsion et al [18] analysed normal contact between copper spherical specimens (with diameters of 3, 5, 10 and 15 mm) and rigid flat samples from hardened steels and sapphire.…”

Section: Introductionmentioning

confidence: 99%

“…Etsion et al [18] analysed normal contact between copper spherical specimens (with diameters of 3, 5, 10 and 15 mm) and rigid flat samples from hardened steels and sapphire. The contact area was measured after unloading using an optical microscope.…”

Section: Introductionmentioning

confidence: 99%

“…After unloading, the real contact area was measured by an optical interference microscope using matching and stitching technique. The maximum possible load applied to this setup was 600 N. In works [18,19,20] the load was applied for 30 seconds and removed.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of a Hemisphere Contact with a Hard Flat

Pawlus

Zelasko²,

Dzierwa

et al. 2018

Teh. vjesn.

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Abstract:In this paper experimental investigation is presented to study the contact of a deformable hemisphere with a hard flat. Hemispheres were made from steel and copper, but flat from silicon carbide. During contact, deformation of hemisphere was measured. After experiment, plastic contact area of hemisphere was estimated on the basis of surface topography measurement by white light interferometer. The experimental results were compared with the theoretical models, showing good agreement.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of a Hemisphere Contact with a Hard Flat

Pawlus

Zelasko²,

Dzierwa

et al. 2018

Teh. vjesn.

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“…From the Hertz Theory [22][23][24], when the initial pressure applied on MRE is 0 σ through a constant loading, corresponding to which there is an initial contact area radius ri0…”

Section: Theoretical Approachmentioning

confidence: 99%

Sensing and Rheological Capabilities of MR Elastomers

Li¹,

Tian²,

Du³

2012

Smart Actuation and Sensing Systems - Recent Advances and Future Challenges

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Gleitfeste Verbindungen im Turm‐ und Mastbau

2015

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Schraubenverbindungen im Turm‐ und Mastbau werden immer dann als gleitfest vorgespannte Verbindungen der Kategorien B oder C nach DIN EN 1993‐1‐8 ausgeführt, wenn die Verformungen und der Schlupf in den Verbindungen minimiert werden müssen, wie zum Beispiel bei Funkmasten und Türmen von Windenergieanlagen. Wesentliche Einflussparameter auf die Tragfähigkeit einer gleitfesten Verbindung sind die Höhe der Vorspannkraft in den Schrauben und die Reibeigenschaften der gepaarten Oberflächen – beschrieben durch die Haftreibungszahl. Ein möglichst hoher und über die Lebensdauer der Struktur garantierter Gleitwiderstand ist wünschenswert, um die Anzahl der Schrauben und die Flächen der aufwändig und damit kostenintensiv herzustellenden Verbindungen gering zu halten und der Forderung der Industrie nach wartungsfreien Verbindungen nachzukommen. Aus diesen Gründen erfolgen derzeit umfangreiche Untersuchungen zur Ermittlung der Haftreibungszahl gleitfester Verbindungen auf Basis der DIN EN 1090‐2 im Rahmen des europäischen RFCS‐Forschungsvorhabens SIROCO unter Berücksichtigung unterschiedlicher Vorspannkraftniveaus und Beschichtungsarten, die im vorliegenden Beitrag auszugsweise am Beispiel von Alkali‐Zink‐Silikat beschichteten und spritzverzinkten gleitfesten Oberflächen vorgestellt werden. Slip‐resistant connection in towers and masts – testing and coating. Bolted connections in towers and masts are executed as slip‐resistant connections of categories B or C according to EN 1993‐1‐8 when deformations and slip have to be minimized, e. g. in radio masts and towers of wind turbines. The load bearing capacity of slip‐resistant connections is mainly influenced by the level of preloading in the bolts and the friction of the faying surfaces – described by the slip factor. The highest possible and over the service life of the structure guaranteed slip resistance is desirable in order to keep the number of bolts and the faying surfaces of the complex and therefore expensive connections low and to meet the demand of the industry for maintenance‐free connections. For these reasons, at present, extensive studies on the determination of the slip factor of slip‐resistant connections on the basis of EN 1090‐2 are carried out as part of the European RFCS research project SIROCO taking into account different preloading levels and coating types. Within the present contribution, first results are presented for alkali zinc silicate coated and zinc spray metallized faying surfaces.

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Experimental Investigation of the Elastic–Plastic Contact Area and Static Friction of a Sphere on Flat

Cited by 51 publications

References 12 publications

Experimental Investigation of a Hemisphere Contact with a Hard Flat

Experimental Investigation of a Hemisphere Contact with a Hard Flat

Sensing and Rheological Capabilities of MR Elastomers

Gleitfeste Verbindungen im Turm‐ und Mastbau

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