| 摘要 |
<p>A high shear strength pultrusion (39) which can be machined without undue strength loss is made from bidirectional woven fiber fabric (15) modified to be pultrudable. In a preferred form, the fabric is pleated in the pultrusion process (37) 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 embodying such have improved isotonic strength qualities over currently produced pultrusions, which are limited to unidirectional fibers, continuous fiber mats, or alternating layers of nonwoven 0° and 90° cloth and do not have the shear strength inherent in the pleated configuration.</p> |
