This research proposal presents a comprehensive methodology for extending numerical models to three-dimensional electrified elastohydrodynamic (EHL) point contacts. The study develops a coupled finite element approach that solves the modified Reynolds equation incorporating electrokinetic effects, elasticity equations for surface deformation, and the Laplace equation for electric potential distribution. A novel multilevel solver strategy is proposed to handle the computational complexity of 3D electrified contacts, providing predictions of pressure distribution, film thickness, and electric field characteristics under combined mechanical and electrical loading.
Key findings
Development of a fully three-dimensional formulation capturing elliptical contact geometry typical of ball bearings in electric vehicles
Integration of electrokinetic effects through a modified Reynolds equation accounting for electric double layer phenomena at the lubricant interface
Coupled multiphysics approach solving fluid mechanics, structural elasticity, and electrokinetics within a unified computational framework
Implementation of an efficient multilevel solution strategy to manage computational complexity of large-scale 3D electrified contact simulations
Validation framework established against existing 2D line contact solutions and experimental data from literature on electrical discharge machining
Limitations & open questions
Experimental validation procedures are outlined but remain to be completed to verify model predictions against physical measurements
Current formulation assumes steady-state isothermal conditions, potentially limiting accuracy under extreme thermal or transient operating conditions
High computational resource requirements for 3D multiphysics simulations may restrict practical applications to offline analysis rather than real-time industrial monitoring