Formulation and its energy balance verification for ultrasonic non-destructive characterization of a single fibre composite interphase

摘要: Abstract It is widely acknowledged that the structural performance of fibre-reinforced composites critically affected by interphase, finite-thickness layer located between fibres and matrix. A need to characterize interphase thus arises. promising ultrasonic non-destructive evaluation (NDE) technique for characterization considered. For successful design implementation technique, an understanding elastic wave propagation scattering involved in this required. As a fundamental approach, two-dimensional plane-strain model formulated time-harmonic plane incident waves from single fibre having homogeneous embedded Two modes waves, longitudinal in-plane shear, are The formal solution problem found via normal mode expansion method. computer program developed calculation its validity confirmed two methods: limiting case analysis energy balance analysis.