Elasto-hydrodynamic lubrication analysis of a porous misaligned crankshaft bearing operating with nanolubricants

In this paper, the combined effects of characteristic size and concentration inorganic fullerene-like tungsten disulphide nanoparticles (IF-WS 2 NPs) or molybdenum (IF-MoS on nonlinear dynamic behaviour a gasoline engine crankshaft bearing subject to an arbitrary force torsor (effective applied moment vector) are theoretically numerically investigated using V. K. Stokes micro-continuum theory. These NPs most common additives for lubrication purposes due their excellent tribological characteristics along with effect reducing friction wear. It is assumed that journal (crankshaft) currently made forged steel rigid main consists thin poroelastic liner low elastic modulus materials like Babbitt metals fixed in stiff housing as defined by ASTM B23-00. The Krieger-Dougherty law included proposed EHD model account viscosity variation respect volume fraction dispersed base lubricant. On other hand, nanomaterials introduced new material entity, denoted l , which responsible couple-stress property. Reynolds equation derived transient conditions modified bearing-liner permeability For torsor, hydrodynamic pressure distribution, squeeze film velocities, misalignment angular velocities determined simultaneously solving discretized equilibrium equations damped Newton-Raphson iterative method at each crank angle step. center trajectories three sections axis well angles deduced from means Runge-Kutta scheme. According obtained results, behavior compliant dynamically loaded operating significant cannot be overlooked.