CE 5310 Lecture 12: Topic 12 Lecture notes -Acoustoelasticity
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Acoustoelasticity is the science that studies the acoustoelastic e ects of materials. Given a material submitted to a particular stress eld, the speed at which mechanical waves travel through it changes depending of the stress eld characteristics; such e ects are called acous- toelastic e ects [bray 2013]. Multiple researchers have measured p (compression), sh (horizontal shear), sv (vertical shear) and r-wave (rayleigh) wave velocities at varying stress levels and stress elds to understand the acoustoelastic e ects. In general terms, when the direction of propagation is parallel to the stress eld, the use of p and r-waves is more sensitive than the use of s-waves. However, the use of polarized s-waves can be utilized to assess biaxial stress elds, and calculate di erences of principal stresses [bray 2013]. The e ects of acoustoelasticity cannot be accurately described with the ordinary linear- elastic theory of in nitesimal deformations. The theory of nite elasticity is needed to.
