Global sensitivity and resonant reflection of thermoelastic waves in a rotating, pre-stressed nonlocal micropolar fibre-reinforced medium under pulsed-laser heating
Materials Today Communications, cilt.56, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 56
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.mtcomm.2026.116159
- Dergi Adı: Materials Today Communications
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
- Anahtar Kelimeler: Critical-angle resonance, Fiber-reinforced, Global sensitivity analysis, Hydrostatic initial stress, Incompressible, Laser-pulse heating, Micropolar, Reflection, Transversely isotropic
- Recep Tayyip Erdoğan Üniversitesi Adresli: Evet
Özet
The reflection of coupled mechanical, microrotational, and thermal waves from microstructured composite surfaces is investigated in an incompressible, transversely isotropic, fibre-reinforced micropolar half-space governed by Eringen-type nonlocal elasticity and three-phase-lag heat conduction. The medium is subjected to hydrostatic initial stress, uniform rotation about the reinforcement direction, and a non-Gaussian laser pulse applied as a surface heat flux. The governing equations incorporate pre-stress, centripetal and Coriolis effects, while incompressibility is enforced through a stream-function formulation. A cubic secular equation confirms the existence of two quasi-transverse displacement modes and one quasi-transverse microrotational mode. Reflection coefficients are obtained by satisfying traction-free, couple-stress-free, and laser-flux boundary conditions. A critical contribution of this work is the derivation of time-averaged energy flux expressions for all reflected wave modes, demonstrating that the large displacement amplitude ratios observed at resonance do not imply energy amplification beyond physical limits. Numerical results reveal a localized phase-matching resonance strongly affected by hydrostatic stress and rotation, whereas the laser pulse governs the thermally induced boundary response. Global sensitivity analysis and partial-rank correlation analysis show that parameter importance depends on both incidence angle and response quantity. Near resonance, interaction effects become comparable to or exceed individual parameter contributions, highlighting the necessity of variance-based sensitivity methods for reliable characterization. The theoretical framework presented herein provides a foundation for potential laser-based nondestructive evaluation applications, while acknowledging the need for experimental validation and extension to finite geometries.