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Schematic of contact area for the JKR model JKR test with a rigid bead on a deformable planar material: complete cycle. To incorporate the effect of adhesion in Hertzian contact, Johnson, Kendall, and Roberts [5] formulated the JKR theory of adhesive contact using a balance between the stored elastic energy and the loss in surface energy. The ...
This rejection proved to be instrumental in the development of the D. Tabor [5] [6] and later D. Maugis [2] [7] parameters that quantify which contact model (of the JKR and DMT models) represent adhesive contact better for specific materials.
JKR or Jkr. may refer to: Janakpur Airport (IATA code: JKR), an airport in southeastern Nepal; Japan Karate-Do Ryobu-Kai, an international karate organization; J. K. Rowling, author of the Harry Potter series; Johnson-Kendall-Roberts model, a mathematical model in contact mechanics; Jones Knowles Ritchie, a British design agency
Model explaining self-cleaning ability [9] Kellar Autumn and his research group have conducted experiments to test and demonstrate this ability of the gecko. [ 9 ] They also use the contact mechanical model to suggest that self-cleaning occurs by an energetic disequilibrium between the adhesive forces attracting a dirt particle to the substrate ...
Finally there are the processes at the contact interface: compression and adhesion in the direction perpendicular to the interface, and friction and micro-slip in the tangential directions. The last aspect is the primary concern of contact mechanics. It is described in terms of so-called contact conditions. For the direction perpendicular to ...
Contact dynamics deals with the motion of multibody systems subjected to unilateral contacts and friction. [1] Such systems are omnipresent in many multibody dynamics applications. Consider for example Contacts between wheels and ground in vehicle dynamics; Squealing of brakes due to friction induced oscillations
A Contact Region is a concept in robotics which describes the region between an object and a robot’s end effector. This is used in object manipulation planning, and with the addition of sensors built into the manipulation system, can be used to produce a surface map or contact model of the object being grasped.
There are mainly two kinds of methods to model the unilateral constraints. The first kind is based on smooth contact dynamics, including methods using Hertz's models, penalty methods, and some regularization force models, while the second kind is based on the non-smooth contact dynamics, which models the system with unilateral contacts as variational inequalities.