Josh Armitage


   

Josh Armitage is a lecturer in surface engineering & tribology at the University of Leeds. His research is primarily focussed on the development & incorporation of advanced in-situ techniques for the assessment of interfacial physicochemical phenomena such as tribo-corrosion, tribo-chemistry, & tribo-electrostatics.

Josh currently leads research, teaching, & outreach activities in tribo-electrostatics & automotive tribology to address key challenges within the sustainable transport & energy sectors respectively, whilst leading additional research activities in Geo-Tribology & Sporting Interfaces.

Abstract: 
An In-situ Approach to Tribo-chemistry & Tribo-electrostatics

There is no question that tribology has historically played a pivotal role in the development of sustainable transport & energy solutions. The significant technological advancements & resulting widespread adoption of electric traction systems has however shifted the landscape upon which tribological research into transport systems is conducted. The global drive for sustainable energy solutions & carbon neutrality has also reinitiated the development of tribo-electrostatic energy scavenging systems. This talk will highlight an in-situ approach to investigating the interfacial mechanisms that characterise these systems - and provide a brief insight into how surface physics can underpin a wide range of seemingly disconnected phenomena.


Abstract: 
Bearings and electrical discharge (EV)
This presentation examines the drivers behind electrically induced discharge damage in variable-speed electric motor bearings. It explores both experimental and numerical methods to enhance our understanding of elastohydrodynamic film dielectric breakdown. Key factors, including surface roughness and legacy electrical discharge pits at bearing interfaces, are analysed, with a focus on their impact on electric field strength and discharge current density.


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