Tribology

Introduction: Nano tribology is a study field of interfacial phenomenon in nano scale. The interaction between two contacting solids during a relative motion from atomic to microscale is important to understand the friction, wear, adhesion, indentation phenomenon. Now a days it has a plenty application in micro electro mechanical system (MEMS), nano electro mechanical system (NEMS), magnetic storage, lubricant manufacturing and many more field. There are few instruments in the market to study the tribology , they are SFA, STM, AFM,FFM. Out of them AFM is a powerful tool to study nano mechanics and nano tribology for its versatile nature in imaging, roughness, nano scale force measurement to manipulation of tiny particle in nanoscale.…

Wheel bearings play very important in the suspension of a vehicle. Drivers can easily locate them in the hub assembly where wheels and brakes are attached. The bearings enable the wheel to rotate and as a result turn freely as the vehicle travels. Most cars have both outer and inner bearings in all wheels. The following is a close look at these bearings that will definitely let you understand fully what they are as well common bearing issues and how they are diagnosed. Basics of car bearings…

The lab that was conducted in class throughout this whole week was basically to find one suitable objective and that was to determine the friction of four surfaces. It consisted of multiple trials of pulling on a block that was measured at .118 kg, for each specific trial that was conducted. For the block, weights were added on top to determine the friction and how it was affected towards the tension and feel of multiple surfaces that the lab was primarily trying to accomplish. The multiple…

Obtaining a fundamental understanding of the underlying physics of granular systems is important both for academic interest and industrial applications. Experimental measurements in full three-dimensional (3D) large industry scale granular system are complicated and expensive. Computational techniques such as the Discrete Element Method (DEM) can potentially be applied as a tool to provide understanding granular machine systems dynamics, virtual equipment design and evaluation of machine…

1.6 TRIBOLOGY The greek word tribo means rubbing (William 1994). It is the science of intermingling of the surfaces which are in sliding and/or rolling motion. In 1996, Tribology was first reported by Jost, England. It has 3 portions. These are A) friction B) Lubrication and C) wear. To understand the tribological behavior, it entails the knowledge of various subjects such as Physics, chemistry, Mathematics, Thermodynamics, Heat Transfer, Material science etc., Tribological problem leads to the…

I thankfully acknowledge the contributions of Tahrim Alam, Syed Zakaria, Tousif Ahmed and William Judge. I appreciate the help, assistance and support I received from my colleagues and friends Avijit Sinha, Rabin Neupane, Chenxin Jin, Momotaj Aghdasi, Chukwuma Onuoha, Dr. Abdulwahab Ibrahim and all my present and past Advance Tribology Laboratory (ATL) group members. I would like to thank Dean Grijm of the machine and instrument shops, Patricia Scallion of the Institute for Research in…