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Recently a nonlinear ultrasound method called Dynamic Acoustoelastic Testing (DAET), previously developed to detect cracks in solids, has been adapted to assess the nonlinear viscoelastic properties of fluids.
L’ostéoporose, pathologie liée à une fragilité du squelette pouvant entraîner des fractures ou tassements de certains sites osseux (vertèbres, col du fémur, poignet) est un vrai problème de santé publique. Depuis plus de 30 ans, des méthodes d’investigation (rayons X, ultrasons) ont été développées pour son diagnostic. Elles renseignent essentiellement sur la masse osseuse, alors que de multiples...
Trabecular bone tissue contains microcracks which may affect its mechanical properties as well as the whole structure. A Dynamic AcoutoElastic (DAE) method based on two acoustic waves coupling was developed to measure viscoelastic and dissipative nonlinearities in trabecular bone. The purpose of this work is to validate the technique sensitivity to monitor microdamage in human calcaneus.
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