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Blade Webs

Blade webs (shear webs) are internal composite panels that connect the upper and lower skins of a wind blade. Typically molded sandwich panels, webs carry shear loads and stabilize the blade’s structure. Made of fiberglass (with foam or balsa core), they form the central “spine” of the blade. Webs are tailored in shape (often tapered) to match the blade profile. They are positioned at regular intervals along the blade span. By distributing loads, shear webs allow the blade skins to be thinner and lighter.

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Key Features

Prepreg or infusion fiberglass laminates; light core materials (PVC, balsa); precise shaping and drilling for flanges and root attachment.

Benefits

Improve blade torsional stiffness and strength; reduce blade deflection under load; minimize material usage by enabling optimized skin thickness.

Applications

Used in all modern composite wind blades; typically two webs in the first half of the blade, extending to the tip for shear strength. Also in some cases used in tower fairings or other structural panels.

Technical Specifications

Web panels are usually 5–20 mm thick (sandwich). Fiber orientations are tailored for maximum shear modulus. They are engineered to meet internal design loads (e.g. shear of ~5–10 MPa on average).

Unique Selling Points (USPs)

We produce blade webs with very tight fiber volume control and low void content for maximum strength. Our pultrusion and vacuum infusion capabilities ensure large-size webs with consistent properties. We can incorporate inserts for bolting to the blade root (hub joint) for secure assembly.