asperity

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asperity

Physics the elastically compressed region of contact between two surfaces caused by the normal force

asperity

[a′sper·ə·dē]
(geology)
A type of surface roughness appearing along the interface of two faults.
References in periodicals archive ?
According to the Hertz solution for a single elastic sphere, Greenwood and Williamson [1] proposed that interaction between contacting asperities was equivalent to contact between a rough surface comprising spherical asperities of constant radius and an ultra-smooth flat surface.
When comparing the fresh engine oil to the mineral oil, there is a large difference in coefficient of friction in particular in the boundary and mixed lubrication regime where there is contact between asperities on the two surfaces.
This was tested by Bailarin, with the fabrication of PCL hierarchical hydrophobic surfaces with asperities that enhanced adhesion [16].
However, in this paper, an asperity is defined from the point of view of the behavior of the seismogenic zone and its response to plate convergence as defined by Lay & Kanamori (1981), who describe asperities as zones of high shear strength on the rupture plane and large coseismic slip due to the buildup of stress prior to a rupture.
Sodium fluoride, NaF (sd fine-chem limited, India), was used as the chemical etchant to develop surface asperities.
8 and its accompanying repeating earthquakes off Kamaishi, NE Japan: Implications for the hierarchical structure of asperities and earthquake cycle.
If the micro pits formed by asperities of uniform roughness are located between rubbing surfaces, they can be filled with lubricant either completely or in part.
2c) and asperities well differentiated; closing apparatus adjacent to atrium (l = 52 pm; w = 22 pm).
The work here deals two kinds of micro-roughness surface which are nano roughness and waviness, termed as asperities here.
Finally, Wasson's easygoing demeanor and midwestern self-effacement helped to sooth and smooth those ancient asperities between Walgreens and the complex world of community pharmacy that have been traditionally separated by size and a level of accomplishment.