Details

Autor(en) / Beteiligte

• Murashima, Motoyuki
• Imaizumi, Yusuke
• Murase, Ryo
• Umehara, Noritsugu
• Tokoroyama, Takayuki
• Saito, Toshiyuki
• Takeshima, Masayuki

Titel

Active friction control in lubrication condition using novel metal morphing surface

Ist Teil von

• Tribology international, 2021-04, Vol.156, p.106827, Article 106827

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We propose a new active friction control method with a morphing surface using a unique diaphragm structure consisting of 60-μm thin metal film. In poor lubrication, the friction coefficient dropped significantly from 0.19 to 0.03 when the surface changed from concave to convex. Optical in situ observations revealed that the oil collected at the convexity due to capillary force and meniscus. In addition, results of electric characteristic measurements revealed that the solid contact area decreased with the convexity. In conclusion, the reduction of solid contact due to improvement of lubrication condition was likely the friction reduction mechanism of the convex shape. Because active friction control realizes minimal friction loss and multifunctionality, the morphing surface can contribute to future machine development. •A new morphing surface using thin metal was developed for active friction control.•The surface exhibits excellent low friction even in a poor lubrication condition.•In-situ optical observation at the friction surface exhibits a friction condition.•The surface collects oil at the convex points, providing better lubrication.•Electrical measurements reveal that the collected oil reduces solid contact.