This study develops a unified analytical framework for size-dependent nonlinear vibration of a sandwich microplate with a graphene-origami auxetic core and piezoelectric layers under coupled thermal, fluid, and viscoelastic-foundation effects. It derives nonlinear frequency-amplitude responses and explores design-parameter sensitivity; the evidence is computational and analytical rather than experimental.
Key findings
- The parametric analysis indicates that the strain-gradient length scale, thermal field, piezoelectric voltage, fluid depth, foundation stiffness and damping, and graphene-origami content, folding, and distribution all alter nonlinear frequency-response curves. The principal contribution is model integration rather than validation of a fabricated device.
Why this matters globally
The framework could support early-stage design screening for smart microscale sensors, actuators, and structures operating in complex environments, potentially reducing experimental search. It does not establish device readiness.
Thai researcher contribution
Researchers affiliated with Chulalongkorn University contributed to the multiphysics mechanics framework and parametric analysis, linking Thai expertise in advanced structures, smart materials, and computational mechanics.
Limitations to consider
Evidence is analytical and numerical, with no reported fabrication or experimental calibration. Validity depends on plate-theory, material, boundary-condition, and fluid-interaction assumptions. Practical use requires validation under manufacturing tolerances and measured material properties.