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Chapitre D'ouvrage Année : 2019

Nonlinear and Hysteretic Constitutive Models for Wave Propagation in Solid Media with Cracks and Contacts

Résumé

This chapter is devoted to theoretical concepts and models for wave propagation, vibrations, or other elastic deformations in solids containing internal contacts (cracks, delaminations, etc.). A direct problem of solid mechanics is solved by building up a solution for elastic fields in materials with known geometry and properties. This study is oriented to nondestructive testing and therefore focuses on the case where the material contains few cracks of known configuration, in contrast to microcracked solids in which a statistical ensemble of a large number of internal contacts is present. Our approach is based on finite element simulations and a frictional contact model assuming generic semi-analytical solutions. These solutions account for surface roughness, friction, and the evolution of stick and slip zones in the contact area. Finally, load–displacement relationships valid for arbitrary loading histories are produced which are used as boundary conditions imposed at internal boundaries (cracks) in the material. As a result, we have developed a numerical toolbox capable of modeling elastic waves and vibrations in damaged samples or structures. The access to all elastic fields together with their nonlinear components makes nondestructive testing fully transparent and offers an opportunity of purposeful optimization of the experimental techniques.
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Dates et versions

hal-02363063 , version 1 (14-11-2019)

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Vladislav Aleshin, Steven Delrue, Olivier Bou Matar, Koen van den Abeele. Nonlinear and Hysteretic Constitutive Models for Wave Propagation in Solid Media with Cracks and Contacts. Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation, Springer International Publishing, pp.175-224, 2019, ⟨10.1007/978-3-319-94476-0_5⟩. ⟨hal-02363063⟩
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