How is blade stiffness influenced by core modulus?
Higher shear modulus increases bending stiffness and controls flapwise
What is the purpose of scoring in foam sheets?
Scoring increases conformability, allowing sheets to follow complex blade
What are the common failure modes of foam in wind blades?
Shear cracking, core crushing, delamination, and local buckling.
How are foam cores bonded to composite skins?
Through resin infusion or prepreg curing, forming a strong[…]
Why is PET foam attractive for recyclable wind blades?
PET is thermoplastic, allowing recycling into new polymer products.
What is the service temperature range for typical foam cores?
Commonly -50°C to +80°C, with high-temp foams suitable for
What quality tests are used for foam core acceptance?
Shear, compression, density, thermal expansion, thickness tolerance, and visual[…]
Can foam cores delaminate under extreme loads?
Improper bonding, overload, or fatigue can cause delamination, though[…]
Why is core print-through an important aesthetic factor?
Print-through can appear on blade surfaces; choosing stable foam[…]
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