High shear strength pultrusion

Details High shear strength pultrusion High shear strength pultrusion

1995-01-26

1997-01-28

Bell, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428102, 428152, 428176, 428181, 428193, B29D 2200

Patent

active

055976298

ABSTRACT:
To produce a pultrusion which can be machined without undue strength loss bidirectional woven fiber fabric is modified to be pultrudable into a high shear strength composite member. In a preferred form of the invention the fabric is pleated in the pultrusion process to create an endless wall of stacked switchback pleated layers which defines a box beam wall in one example, and the shaft of a bolt in another. Products produced by this process have improved isotonic strength qualities over currently produced pultrusions, which are limited to unidirectional fibers, continuous fiber mats, or alternating layers of non-woven 0.degree. and 90.degree. cloth and do not have the shear strength inherent in the pleated configuration.

REFERENCES:
patent: 4564540 (1986-01-01), Davies et al.
patent: 5055242 (1991-10-01), Vane
patent: 5303916 (1994-04-01), Rodgers

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