Yuval Boneh

Assistant Professor

 

Department of Geological and Environmental Sciences
 

Ben-Gurion University in the Negev

Contact information:

 

Email: bonehyuv@bgu.ac.il

 

​Phone: +972-8-6461367

 

Office # 333

Grosman Building for Geology (# 58)

Geotribology - Friction, wear and lubrication of faults

Tribology is the science of interacting surfaces - the study of friction, wear, and lubrication. Geotribology of faults is the phenomena related to slip along faults, whether in an unstable (earthquake) or stable (slow creep) fashion.

Wear along faults, i.e., gouge, is ubiquitously observed in the field.  However, the evolution of fault gouge production, i.e. wear-rate, and its evolution with respect to the slip properties and fault's strength is not well-known.

I used ‘wear-maps’ diagram, a tool to characterize wear  intensities under different mechanical conditions, to show a slip-mechanism transition from a dominant brittle to ductile mechanisms. This transition was also correlated with the appearance of shiny-smooth slip surfaces, characteristic of carbonate faults in the field.

Friction and wear maps  (Boneh et al., 2013)

Shinny surfaces on experimental fault with dolomite

Wear-rate law for rocks  (Boneh and Reches, 2018)

A movie of a experiment using 'ROGA' rotary shear apparatus at the University of Oklahoma

From left to right: Xiaofeng Chen, Jefferson Chang, Ze'ev Reches, Yuval Boneh, and Zonghu Liao.