Acoustic emission wave propagation in honeycomb sandwich panel structures

This paper studies acoustic emission (AE) wave propagation in a glass fibre aluminium honeycomb sandwich panel (HSP). Of particular novelty is the quantification of through-thickness AE from one surface HSP to other, which real-world monitoring consideration for applications where instrumentation only be permissible on surface, i.e. aerofoils. Complexity was introduced specimens stages enable thorough understanding; first investigating large laminated plate (GFLP) alone; then bespoke with limited number cells; and, finally, HSP. The results this demonstrate that, whilst some energy transmitted through core, propagating an becomes bound outer plates. Despite this, these plates differs that equivalent same material isolation due complex interactions structural elements Further, other quantified time, giving insight into expected attenuation rates and characteristics practical applications.