Determination of third order elastic constants in a complex solid applying coda wave interferometry

Payan, C.; Garnier, V.; Moysan, J.; Johnson, P. A.
January 2009
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p011904
Academic Journal
In this letter we describe the development of coda wave interferometry to determine acoustoelastically derived third order nonlinear coefficients of a highly complex material, concrete. Concrete, a structurally heterogeneous and volumetrically mechanically damaged material, is an example of a class of materials that exhibit strong multiple scattering as well as significant elastic nonlinear response. We show that intense scattering can be applied to robustly determine velocity changes at progressively increasing applied stress using coda wave interferometry, and thereby extract nonlinear coefficients.


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