Effects of anisotropy and orientation of carbon epoxy in the behaviour of acoustics waves

The carbon epoxy is a composite material extensively used in reason of these particulars mechanical characteristics. It is constituted by an assembly of layers whose the fibers of carbons have all the same orientation. The propagation of acoustics waves in this type of material being the object of several works. This paper consists to study the water / carbon epoxy interface, with any orientation of the fibers. A complete analysis of the problem of propagation of acoustic waves including a calculation of the reflection-transmission coefficients, for a given orientation of carbon epoxy. Some results linked to the reflection - transmission like the critical angles, the mode conversion, the new wave and the birefringence will be discussed. In this study two case will be considered: in the first case we chose a plan of incidence which coincides with a plane of symmetry of the media. In the second case the plan of incidence is out this plan.