School of Mechanical, Electrical and Manufacturing Engineering


Tribodynamics of ball CV joints

Tribodynamics of ball CV joints

Reliability of vehicles and safe handling of the various manoeuvres required from a vehicle on road is an important aspect of vehicles design. The robust yet flexible performance of the vehicle drivetrain system is of paramount importance under the very harsh driving conditions such as those encountered in top automotive racing applications.

Our Aim

Driveline reliability is a critical requirement for the automotive industry and particularly for top high-performance racing vehicles, which is the focus of the current research program. Continuous velocity (CV) joints are used in the vehicle drivetrain to allow for variable angles of articulation between rotating components and can often be the cause of driveline failure. This research program will aim at developing an investigative methodology to study the dynamics and tribology of CV joints under various operating conditions through a multidisciplinary research approach.

The methodology adopted will include the development of multiphysics tribological, contact mechanics and multibody dynamics mathematical models. The models should consider various vehicle operating conditions and both kinematic and kinetic behaviour of the driveline. To obtain realistic input parameters and further assessment of the components involved, experimental characterisation of surface topography, rheological assessment of the lubricant and representative tribometry is expected to be carried out. The project provides an opportunity for in-depth understanding of the complex dynamics and tribological behaviour at the contact of CV joints.

Our Research

The research utilises extensive use of metrology equipment such as optical microscopy, white light interferometry to assess the surface topography of components as well as use of advanced rheometry techniques to examine and characterise the lubricating medium. The research also utilised advanced multibody dynamic analysis techniques combined with the detailed tribological contact mechanics models. 

Our Outcomes

The research is ongoing and has so far highlighted the importance of use of appropriate surface characterising techniques as well as multibody dynamics in characterising actual contact conditions.

Dr Ramin Rahmani - Senior Lecturer in Tribology and Dynamics

"This is a collaborative research which is focused on combined experimental and computational analysis of the constant velocity (CV) joints, used extensively in many drivetrain applications. The subsequent optimisation of such systems will allow for design of systems which result in a superior performance."

Dr Ramin Rahmani - Senior Lecturer in Tribology and Dynamics

Athena Swan Bronze award

Contact us

The Wolfson School of Mechanical, Electrical and Manufacturing Engineering
Loughborough University
LE11 3TU