Microstructured induced band pattern in Love wave propagation for novel nondestructive testing (NDT) procedures

We propose a new approach for assessing microstructural properties of materials via nondestructive testing (NDT). This lies on the observation that, accounting microstructure within materials, reveals nonclassical band propagation pattern Love waves. Precisely this structure may be directly related to internal microstructure. To illustrate this, waves is first investigated linear theory couple stress with micro-inertia. Proving wave existence by argument principle provides closed-form condition occur. connection defines bands, whose limits correspond situation when move same speed as bulk in underlying half-space (internal resonance). closely layer-to-substrate and it used assess either two. Furthermore, we show that frequency equation three-term combination antiplane Rayleigh Rayleigh–Lamb functions (in free free/clamped plate). Consequently, investigation any extra observable, such waves, reduces risk multiple solutions at signal processing stage. finally consider limit or layer becomes classical elastic. unseemly bonding dissimilar models, sometimes adopted literature, usually leads inconsistencies.