Topic
Contact area
About: Contact area is a research topic. Over the lifetime, 12358 publications have been published within this topic receiving 256401 citations. The topic is also known as: contact patch & contact region.
Papers published on a yearly basis
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22 May 1999
TL;DR: In this paper, a semiconductor device is described, comprising of a source contact area, a gate contact area and a drain contact area with the contact areas arranged on a selected one of the top and bottom surfaces.
Abstract: A semiconductor device (60) is disclosed, comprising: a semiconductor die (62) including top and bottom surfaces, the semiconductor die (62) further comprising a source contact area (64), a gate contact area (66), and a drain contact area, wherein the contact areas (64, 66) are arranged on a selected one of the top and bottom surfaces; a drain lead (72) comprising a top surface, a bottom surface (72c), and a coupling portion (72a) coupled to the drain contact area of the semiconductor die (62); and an encapsulant (74) enclosing a portion of the semiconductor die (62) and a portion of the drain lead (72) such that the bottom surface (72c) of the drain lead (72) remains exposed.
74 citations
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TL;DR: In this paper, the authors compared the predictions of the theory of a rigid cone indenting an elastic half space and by assuming that the rigid pyramid could be likened to a cone of a semi-included angle of 70.3°.
73 citations
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TL;DR: In this paper, visual observations of contact areas between soft rubber sliders and hard tracks, and between hard and soft rubber tracks, show that relative motion between the two frictional members is often only due to "waves of detachment" crossing the contact area at high speed from front to rear.
Abstract: Visual observations of contact areas between soft rubber sliders and hard tracks, and between hard sliders and soft rubber tracks, show that relative motion between the two frictional members is often only due to “waves of detachment” crossing the contact area at high speed from front to rear. Adhesion appears to be complete between these waves which are moving folds in the rubber surface, almost certainly produced by buckling. Buckling is attributed to tangential compressive stresses, predicted by a simple theory and qualitatively confirmed by experiment. The driving force for the waves of detachment is a tangential stress gradient, also theoretically predicted.
73 citations
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TL;DR: In this paper, structural changes produced in various materials by rolling contact fatigue under various conditions are classified into four types (dark tint, dark needle, dark line and white band), depending upon test temperature, tempering resistance of the material, contact stress and loading cycle.
73 citations
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TL;DR: In this paper, a model of a secondary hydrodynamic lubrication mechanism, called micro-pool or microplasto hydrodynamical lubrication, has been developed, which shows that, with sufficiently high viscosity and sliding speed, the lubricant trapped in the micropools between the tool and workpiece can be drawn into the interface.
Abstract: A model of a secondary hydrodynamic lubrication mechanism, which is called micro-pool or micro-plasto hydrodynamic lubrication, has been developed. It shows that, with sufficiently high viscosity and sliding speed, the lubricant trapped in the micro-pools between the tool and workpiece can be drawn into the interface. The friction force is either increased or decreased, depending on the viscosity and sliding speed. Without bulk stretching, the product of the lubricant viscosity and sliding velocity can be used as an index to indicate whether or not micro-pool lubrication will occur. Stretching the workpiece may make a strong influence not only on the thickness of the permeating film but also on the asperity contact area.
73 citations