Slider and hinge joints

Nonlinear Dynamics and Control of Crank-Slider Mechanism with Multiple Clearance Joints

In the current study, behavior of crank-slider mechanism with single and multiple clearance joints are analyzed. Using Lankarani-Nikravesh theory for estimating discontinuous contact forces in clearance joints, relevant systems have been mathematically modeled. Through numerical simulations, perturbations in response of mechanisms with clearance joints have been analyzed. Effects of increasing ...

The Slider-Pinning Problem

A Laman mechanism is a flexible planar bar-and-joint framework with m ≤ 2n− 3 edges and exactly k = 2n−m internal degrees of freedom. The mechanism can be completely immobilized by constraining the coordinates of some of the vertices to lie on fixed straight lines. The Slider Pinning problems asks for the minimum set of sliders that will pin a given mechanism. A particular degenerate case is to...

Slider : un Raisonneur Incrémental Évolutif

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The Walldius hinge arthroplasty.

Eighty-three Walldius arthroplasties, performed by one surgeon as salvage operation on the knee joint between 1966 and 1972, were independently reviewed. The fifty-seven living patients with sixty-seven arthroplasties were interviewed and examined and the clinical records of the deceased patients were inspected. Sixty-seven arthroplasties (81 per cent) were successful and sixteen failed (19 per...

Fixed hinge knee arthroplasty.