Lift forces on three-dimensional elastic and viscoelastic lubricated contacts
Arash Kargar-Estahbanati, Bhargav Rallabandi
Abstract
When an object suspended in fluid moves past a soft substrate it experiences a lift force due to the deformability of the substrate. Here, we find this lift force analytically for a general elastic or viscoelastic substrate. For oscillatory relative motion, the lift force is time-dependent and its temporal Fourier modes carry signatures of the viscous and elastic components of the substrate response. The theory may be useful to characterize the mechanical properties of soft materials without solid-to-solid contact via lift force measurements.
Topics & Concepts
Lift (data mining)ViscoelasticityMechanicsBody forceMaterials scienceElasticity (physics)Fourier seriesSubstrate (aquarium)Classical mechanicsPhysicsComposite materialMathematicsComputer scienceGeologyMathematical analysisData miningOceanographyAdhesion, Friction, and Surface InteractionsForce Microscopy Techniques and ApplicationsSports Dynamics and Biomechanics