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.
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TL;DR: In this article, the authors calculate the equilibrium stresses and strains in the substrate as well as in the deposit by using a method initiated by Hu [J. Appl. Phys. 50 (1979) 4661] where continuous forces that the deposit exerts on its substrate are calculated in a self-consistent way.
104 citations
TL;DR: In this article, a progressive quasi-static approach was developed to study the low-velocity impact response of GLARE fiber-metal laminates, and the impacting mass, impact force, and impact duration were assessed for the projectile.
104 citations
TL;DR: In this article, a test bed that allows the separation of effective thermal conductivity and thermal contact resistance in metal foams is described, where measurements are performed in a vacuum under varying compressive loads using ERG Duocel aluminium foam samples with different porosities and pore densities.
Abstract: Accurate information on heat transfer and temperature distribution in metal foams is necessary for design and modelling of thermal-hydraulic systems incorporating metal foams. The analysis of heat transfer requires determination of the effective thermal conductivity as well as the thermal contact resistance (TCR) associated with the interface between the metal foam and the adjacent surfaces/layers. In this study, a test bed that allows the separation of effective thermal conductivity and TCR in metal foams is described. Measurements are performed in a vacuum under varying compressive loads using ERG Duocel aluminium foam samples with different porosities and pore densities. Also, a graphical method associated with a computer code is developed to demonstrate the distribution of contact spots and estimate the real contact area at the interface. Our results show that the porosity and the effective thermal conductivity remain unchanged with the variation of compression in the range 0‐2MPa; but TCR decreases significantly with pressure due to an increase in the real contact area at the interface. Moreover, the ratio of real to nominal contact area varies between 0 and 0.013, depending upon the compressive force, porosity, pore density and surface characteristics. (Some figures in this article are in colour only in the electronic version)
103 citations
TL;DR: In this paper, the variation of electrical resistivity of an insulator-conductor composite, namely, waxgraphite composite, with parameters such as volume fraction, grain size, and temperature has been studied.
Abstract: The variation of electrical resistivity of an insulator‐conductor composite, namely, wax‐graphite composite, with parameters such as volume fraction, grain size, and temperature has been studied. A model is proposed to explain the observed variations, which assumes that the texture of the composite consists of insulator granules coated with conducting particles. The resistivity of these materials is controlled mainly by the contact resistance between the conducting particles and the number of contacts each particle has with its neighbors. The variation of resistivity with temperature has also been explained with the help of this model and it is attributed to the change in contact area.
103 citations
TL;DR: In this paper, the authors measured and modeled the water-filled contact area and related it to the conductivity of a series of aggregates by using a morphological pore network model.
103 citations