SYMPOSIA PAPER Published: 01 January 1989

The Torsional Failure and Fracture Energy in Shear of Pultruded Rod


The process of pultrusion results in a highly anisotropic laminate. When this is twisted, it tends to split along its length. A torsion tester is used in conjunction with a laboratory scale pultruder to demonstrate a novel method of determining the fracture energy in shear. As pultrusions are the only laminates that must use an internal release agent, the effects of this are explored to show the validity of the technique.

Author Information

Outwater, JO
The University of Vermont, Burlington, VT
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Developed by Committee: D30
Pages: 224–230
DOI: 10.1520/STP10029S
ISBN-EB: 978-0-8031-5071-3
ISBN-13: 978-0-8031-1196-7