Inversion of V(z) responses for determination Cij elastic constants by using an optimization method on the singularities of the reflection coefficient - Archive ouverte HAL Access content directly
Conference Papers Year : 2002

Inversion of V(z) responses for determination Cij elastic constants by using an optimization method on the singularities of the reflection coefficient

Abstract

The measurement of the V(z) curve, also called acoustical material signature has been used to determine cij elastic constants. The method is based on the comparison of measured and calculated R(θ,f) reflection coefficient. The measured R(θ,f) is determined by inversion of the V(z) curve. The cij elastic constants are obtained by using an optimization method (simplex method), which minimizes the square difference summation Σ|Rm-Rc|2 between the measured and calculated R(θ,f) (phase and modulus) on limited angular ranges. This paper deals with the case of isotropic plates and anisotropic cubic substrates.
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Dates and versions

hal-00149914 , version 1 (29-05-2007)

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Youssef Benmehrez, Michael Lematre, G. Bourse, Wei-Jiang Xu, Mohamed Ourak. Inversion of V(z) responses for determination Cij elastic constants by using an optimization method on the singularities of the reflection coefficient. QUANTITATIVE NONDESTRUCTIVE EVALUATION, Jul 2001, Brunswick, United States. pp.1353-1360, ⟨10.1063/1.1472952⟩. ⟨hal-00149914⟩
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