SYMPOSIA PAPER Published: 01 January 1990
STP24127S

Thermoviscoelastic Characterization and Prediction of Kevlar/Epoxy Composite Laminates

Source

Unidirectional fiber-reinforced plastic (FRP) composite lamina, made from Kevlar 49 fibers and Fiberite 7714A epoxy, were characterized for nonlinear thermoviscoelastic response using the time-temperature superposition principle (TTSP). Mechanical static creep and creep recovery tests were performed using strain gages on 0°, 10°, and 90° unidirectional specimens at numerous temperature and stress levels. Master curves and shift factor functions for all four orthotropic material properties (fiber direction S11, fiber/transverse coupling direction S12, transverse direction S22, and shear S66 compliances) were obtained. Results were used in a numerical procedure to predict the viscoelastic response of general laminates. Predictions are compared with actual test results on selected two, three, and four fiber direction laminates made from Kevlar/epoxy.

Author Information

Gramoll, KC
Memphis State University, Memphis, TN
Dillard, DA
Virginia Polytechnic Institute and State University, Blacksburg, VA
Brinson, HF
University of Texas at San Antonio, San Antonio, TX
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: D30
Pages: 477–493
DOI: 10.1520/STP24127S
ISBN-EB: 978-0-8031-5120-8
ISBN-13: 978-0-8031-1287-2