Wave propagation across a finite heterogeneous interphase modeled as an interface with material properties. (September 2017)

• Record Type: Journal Article
• Authors: Rosi, Giuseppe; Placidi, Luca; Nguyen, Vu-Hieu; Naili, Salah
• Is Part Of: Mechanics research communications. Volume 84(2017)
• Page Start: 43
• Page End: 48
• Publication Date: 2017-09
• Subjects: Interphase -- Interface -- Surface -- Wave propagation -- Reflection coefficient; Mechanics, Applied -- Periodicals; Mécanique appliquée -- Périodiques; Mechanics, Applied; Periodicals; 530
• DOI: 10.1016/j.mechrescom.2017.06.004
• Languages: English
• ISSNs: 0093-6413

Abstract

Highlights: An identification procedure for a surface with material properties replacing a finite heterogeneous interphase is proposed. The results are compared with finite element simulations. The validity range of the model is defined and highlighted. The importance of the inertial properties of the interface is shown. Abstract: Mechanical problems involving an interphase between two well-defined, and eventually different, materials are of interest. The aim of this paper is to present a simplified model that, for low frequency regime, is appropriate for this situation: an interface model with elastic and inertial properties. We present, together with the equations of motion, an identification procedure that is valid for any mass density profile along the thickness of the interphase. For evaluating the accuracy of the model, computations of the reflection coefficients in some relevant cases are shown. Besides, a finite element method is used as a benchmark for both the high and low frequency regimes. It is worth to be noted that the numerical test has been inspired by the problem of the interphase that is formed at the bone-implant boundary.