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Communication Dans Un Congrès Année : 2012

Contact mechanics based on Preisach analysis

Résumé

The origin of acoustic contact nonlinearity is in nonlinear force-displacement relationships for mechanical contacts between solids or surfaces. The response of a particular contact depends on shapes of contacting surfaces (regular or random) as well as on external excitation (normal and/or tangential). In this communication, quite a general model for contact mechanics with friction is presented which is applicable to a wide range of contact shapes and any kind of excitation provided the normal and tangential components are in one plane and are linked via a functional dependency. A usual difficulty in solving problems of contact mechanics with friction for general loading histories is due to the complex memory-dependent behavior of the solution. Depending on rates of normal and tangential actions, several regimes can be encountered. Transitions between the regimes are usually described for particular loading histories only. Here our analysis is based on the Preisach model that represents a general formalism for description of hysteretic functions. The formalism considers the system's memory as a collection of bi-stable elements that switch between two states following the external action. This easy-to-program method presents a computer-assisted analytical solution to the problem. These results are addressed to anyone interested in modeling for contact nonlinearity with friction, including complex structures with rough surfaces, cracks, delaminations, cantilevers for surface probing, granular materials, etc.
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Dates et versions

hal-00819461 , version 1 (01-05-2013)

Identifiants

  • HAL Id : hal-00819461 , version 1

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Vladislav Aleshin. Contact mechanics based on Preisach analysis. European GDR-Workshop on Nonlinearities in Acoustics, 2012, Nice, France. ⟨hal-00819461⟩
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