Contact Pressure
Contact Pressure - Related Videos
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
01:13
Contact Angle
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2023
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces. The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
08:25
Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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Cited by 2 •
2022
Contact hypersensitivity (CHS) is a murine experimental model of allergic contact dermatitis (ACD). CHS is based on sensitization with reactive hapten by painting the shaved skin of the chest and abdomen, with a subsequent ear skin challenge with a diluted hapten, causing a swelling reaction that is assessed in various ways.
03:55
Larval Contact Assay: A Procedure to Evaluate Mosquito Larval Mortality following Direct Contact with Test Larvicidal Compound
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2025
In this video, we describe the larval contact assay to evaluate the toxicity of the dopamine receptor antagonist amitriptyline on the third instar stage larvae of mosquitoes, known vectors of several human infectious diseases. Assessing the larval mortality upon incubation with different amitriptyline concentrations over different time intervals helps determine its lethal concentration 50.
08:28
Development of an In Vitro Ocular Platform to Test Contact Lenses
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Cited by 14 •
2016
Current in vitro models for evaluating contact lenses (CLs) and other eye-related applications are severely limited. The presented ocular platform simulates physiological tear flow, tear volume, air exposure and mechanical wear. This system is highly versatile and can be applied to various in vitro analyses with CLs.
FAQs
Contact pressure is not uniform by default: geometry controls how bodies meet, while material stiffness affects how readily the interface deforms. Surface roughness modifies the actual interaction, and elastic or plastic deformation changes the area over which force is transmitted. These variables together determine the pressure distribution and the resulting mechanical response.
Hertzian contact theory provides a model for estimating pressure fields at contacting surfaces. Engineers can use those estimates to examine whether a proposed geometry and material pairing can carry the applied load without unacceptable localized stress. The resulting pressure information supports comparisons among designs and helps guide material selection, geometry optimization, and reliability assessment.
Localized loading affects more than static strength. In engineering interfaces, the pressure condition is relevant to friction and wear, while excessive concentration can contribute to indentation or fatigue. For seals, it may also be associated with leakage risk. Considering these outcomes together helps engineers evaluate performance rather than treating contact as a purely geometric condition.
An evaluation should account for the applied load, contact geometry, material stiffness, surface roughness, and whether deformation remains elastic or becomes plastic. Engineers then examine the resulting pressure distribution and compare it with likely consequences such as indentation, fatigue, leakage, or wear. This organized assessment connects interface conditions to design and reliability decisions.
In these components, analysis links the way surfaces meet to the loads they transmit and the damage they may experience. Bearings, gears, seals, and wheels each present an interface where pressure distribution can influence wear or other performance risks. Engineers use the results to refine geometry, choose materials, and assess whether the design is reliable.
It deserves attention whenever force passes through a localized interface and concentrated loading could affect function or service life. Typical concerns include indentation, fatigue, excessive wear, or leakage. Applying the analysis during design helps identify these risks early, compare alternatives, and balance geometry and material choices against the expected reliability of bearings, fasteners, seals, wheels, or structural interfaces.