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Study of the effect of contact force model on the dynamic response of mechanica...
Koshy, C. S.; Flores, Paulo; Lankarani, H. M.The main objective of this work is to present a computational and experimental study on the contact forces developed in revolute clearance joints. For this purpose, a well-known slider-crank mechanism with a revolute clearance joint between the connecting rod and slider is utilized. The intra-joint contact forces that generated at this clearance joints are computed by considered several different elastic and di...
Lubricated revolute joints in rigid multibody systems
Flores, Paulo; Ambrósio, Jorge; Claro, José Carlos Pimenta; Lankarani, H. M.; Koshy, C. S.The main purpose of this work is to present a general methodology for modeling lubricated revolute joints in constrained rigid multibody systems. In the dynamic analysis of journal-bearings, the hydrodynamic forces, which include both squeeze and wedge effects, generated by the lubricant fluid, oppose the journal motion. The hydrodynamic forces are obtained by integrating the pressure distribution evaluated wit...
A study on dynamics of mechanical systems including joints with clearance and l...
Flores, Paulo; Ambrósio, Jorge; Claro, José Carlos Pimenta; Lankarani, H. M.; Koshy, C. S.In this work a methodology for the dynamical analysis of mechanical systems considering realistic joint characteristics, namely, joints with clearance and lubrication is presented. For the case of the joints with clearance modelled as a contact pair with dry contact, a technique using a continuous approach for the evaluation of the contact force is applied, in which the energy dissipation in form of hysteresis ...
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