Contact splitting and the effect of dimple depth on static friction of textured surfaces.

The morphological texturing of surfaces has demonstrated its high potential to maximize adhesion as well as to reduce friction and wear. A key to understanding such phenomena is a principle known as contact splitting. Here, we extend this concept to the static friction behavior of dimpled surfaces. Our results indicate that contact splitting does exist for such structures and that with certain dimple sizes and depths static friction values significantly exceeding those of untextured surfaces can be obtained. These results can be applied to all surfaces where friction forces are to be tuned, from nanoelectromechanical systems up to combustion engines.

[1]  Izhak Etsion.  State of the Art in Laser Surface Texturing , 2004 .

[2]  E. Arzt,et al.  Humidity influence on the adhesion of biomimetic fibrillar surfaces , 2009 .

[3]  Stanislav N. Gorb,et al.  Effect of real contact geometry on adhesion , 2006 .

[4]  Jay Fineberg,et al.  Detachment fronts and the onset of dynamic friction , 2004, Nature.

[5]  R. Wahl,et al.  Experimental study of the effect of microtexturing on oil lubricated ceramic/steel friction pairs , 2009 .

[6]  J. Fineberg,et al.  Slip-stick and the evolution of frictional strength , 2010, Nature.

[7]  Eran Bouchbinder,et al.  Slow cracklike dynamics at the onset of frictional sliding. , 2011, Physical review letters.

[8]  Izhak Etsion,et al.  A Model for Mechanical Seals with Regular Microsurface Structure , 1996 .

[9]  S. Gorb,et al.  From micro to nano contacts in biological attachment devices , 2003, Proceedings of the National Academy of Sciences of the United States of America.

[10]  J. Fineberg,et al.  Contact area measurements reveal loading-history dependence of static friction. , 2006, Physical review letters.

[11]  Diego Marchetto,et al.  Tribological effects of surface texturing on nitriding steel for high-performance engine applications , 2008 .

[12]  Ralph Spolenak,et al.  Evidence for capillarity contributions to gecko adhesion from single spatula nanomechanical measurements. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[13]  R. Full,et al.  Evidence for van der Waals adhesion in gecko setae , 2002, Proceedings of the National Academy of Sciences of the United States of America.

[14]  Carlo Menon,et al.  Recent advances in the fabrication and adhesion testing of biomimetic dry adhesives , 2010 .

[15]  Eduard Arzt,et al.  Gecko‐Inspired Surfaces: A Path to Strong and Reversible Dry Adhesives , 2010, Advanced materials.

[16]  J. Xuan,et al.  Optimization of bump shape and pattern in laser-texture design for improving media tribological performances , 1999, IEEE International Magnetics Conference.

[17]  Stanislav N. Gorb,et al.  Geometry-controlled adhesion: revisiting the contact splitting hypothesis , 2011 .

[18]  Peter Andersson,et al.  Microlubrication effect by laser-textured steel surfaces , 2007 .

[19]  Antonius Lubrecht,et al.  Transient increase of film thickness in micro-textured EHL contacts , 2005 .

[20]  Jay Fineberg,et al.  Static friction coefficient is not a material constant. , 2011, Physical review letters.

[21]  Eduard Arzt,et al.  Adhesion of bioinspired micropatterned surfaces: effects of pillar radius, aspect ratio, and preload. , 2007, Langmuir : the ACS journal of surfaces and colloids.

[22]  Z. Dai,et al.  Local nanoscale heating modulates single-asperity friction. , 2010, Nano letters.

[23]  I. Etsion,et al.  Improving fuel efficiency with laser surface textured piston rings , 2009 .

[24]  Huajian Gao,et al.  Effects of contact shape on the scaling of biological attachments , 2005, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[25]  R. Full,et al.  Adhesive force of a single gecko foot-hair , 2000, Nature.

[26]  Johannes Schneider,et al.  Development of Al2O3 based ceramics for dry friction systems , 2005 .

[27]  S. Sinha,et al.  A Tribological Study of SU-8 Micro-Dot Patterns Printed on Si Surface in a Flat-on-Flat Reciprocating Sliding Test , 2011 .