Aerospace Transient Aeroelastic Analysis of Origami-Enriched Metamaterial Structures under Time-Varying Supersonic Freestreams
AEROSPACE SCIENCE AND TECHNOLOGY, cilt.180, 2027 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 180
- Basım Tarihi: 2027
- Doi Numarası: 10.1016/j.ast.2026.113449
- Dergi Adı: AEROSPACE SCIENCE AND TECHNOLOGY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, zbMATH, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Recep Tayyip Erdoğan Üniversitesi Adresli: Evet
Özet
A transient aeroelastic framework is developed for graphene origami-enabled auxetic metamaterial (GOEAM) plates exposed to time-varying supersonic freestreams. A refined shear-deformable plate formulation is developed by incorporating transverse shear deformation, thickness stretching arising from the plate's thickness, and the contribution of through-thickness normal stresses to the overall deformation field. The structural kinematics are established using the trigonometric-cubic monomial shear deformation theory (TCMSDT), enabling an accurate representation of higher-order displacement distributions without requiring shear correction factors. The unsteady aerodynamic loading is modeled through Krumhaar's supersonic piston theory extended to account for time-varying supersonic freestream conditions, thereby capturing the complete temporal evolution of aerodynamic pressure. The resulting transient aeroelastic problem is solved by combining a two-dimensional differential quadrature approach (2D-DQA) with the Laplace transform technique, providing an efficient solution procedure while fully preserving the time-dependent aerodynamic effects. The validation shows excellent agreement with benchmarks. The parametric results demonstrate that: (i) the X-type grading pattern consistently reduces transverse deflections compared to uniform and O-type patterns; (ii) increasing the graphene weight fraction systematically reduces displacements and stresses; (iii) increasing the hydrogen coverage fraction amplifies deformations and stresses; (iv) higher decay coefficients attenuate the transient response; (v) the flutter boundary shifts to lower aerodynamic pressures with increasing hydrogen coverage and to higher pressures with increasing graphene content and flow angle.