Acoustoelasticity in cancellous bone.
Strain-dependence of ultrasound speed in cancellous bone was determined by applying a range of uniaxial compressive strains in the elasticity region, in a single direction, parallel or perpendicular to the propagating wave. Compressive strain modulated the ultrasound speed significantly. The decrease of ultrasound speed was found to change linearly as a function of strain. The changes of broadband ultrasound attenuation were also determined for the two dilatational waves (parallel or perpendicular to the strain). They do not follow linear relation or constant sign of change with strain for the examined specimens. Considerable possibilities open up for using developments in acoustoelasticity for nondestructive ultrasonic techniques.
Department of Mechanical Engineering and Aeronautics, Laboratory of Biomechanics and Biomedical Engineering, University of Patras, Rion 26500, Greece apostolkon@gmail.com, kpappa@mech.upatras.gr, deligian@mech.upatras.gr.
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Apostolopoulos
Department of Mechanical Engineering and Aeronautics, Laboratory of Biomechanics and Biomedical Engineering, University of Patras, Rion 26500, Greece apostolkon@gmail.com, kpappa@mech.upatras.gr, deligian@mech.upatras.gr.
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Pappa
Department of Mechanical Engineering and Aeronautics, Laboratory of Biomechanics and Biomedical Engineering, University of Patras, Rion 26500, Greece apostolkon@gmail.com, kpappa@mech.upatras.gr, deligian@mech.upatras.gr.
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Deligianni