The flexural stiffness D of a sandwich panel = (E_f * t_f * d²)/2 + (E_c * t_c³)/12, where E_f is face modulus, t_f face thickness, d distance between face neutral axes, E_c core modulus, t_c core thickness. The core mainly influences overall deflection through its shear modulus G_c. For beams with a span-to-depth ratio >15, core shear deformation can account for 30–60% of total deflection. For example, PET foam G_c=25 MPa, PU foam G_c≈4 MPa, so PU core panels have significantly higher deflection under the same load. In engineering design requiring L/200 deflection control, critical shear buckling load must be checked to prevent core local wrinkling.
How can the flexural stiffness of a sandwich panel be estimated from the core’s shear modulus?
- XPS Foam Core
- PET Foam Core
- PVC Foam Core
- PU Foam Core
- PMI Foam Core
- PP Honeycomb Core
- Balsa Wood
- XPS Backer Board
- FRP XPS Sandwich Panel
- FRP PET Sandwich Panel
- FRP PVC Sandwich Panel
- FRP PP Honeycomb Panel
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