SYMPOSIA PAPER Published: 01 January 1997

Testing Facilities for Multiaxial Loading of Tubular Specimens


The development of a new multiaxial testing machine is presented. The testing machine is capable of applying axial load, differential pressure, and torsion to a tubular specimen under independent servohydraulic control. Relative merits of various loading configurations are described. Stress/strain controlled, monotonic/cyclic, and in-phase/out-of-phase (nonproportional) tests under ambient temperature conditions can be performed with this system. The associated computer control hardware and software allows for a number of complex user-defined loading and acquisition schemes. Monotonic and cyclic tests on tubular specimens made of glassfiber-reinforced epoxy with fiber orientations of ±45° and 0°, are presented. Details of the experimental apparatus and representative test results are discussed in this paper.

Author Information

Ellyin, F
University of Alberta, Edmonton, Alberta, Canada
Wolodko, JD
University of Alberta, Edmonton, Alberta, Canada
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Developed by Committee: E08
Pages: 7–24
DOI: 10.1520/STP16210S
ISBN-EB: 978-0-8031-5352-3
ISBN-13: 978-0-8031-2045-7