Frequency Effect on the Fatigue Life of a Laminated Composite

CT Sun; WS Chan

doi:10.1520/STP36921S

SYMPOSIA PAPER Published: 01 January 1979

STP36921S

Frequency Effect on the Fatigue Life of a Laminated Composite

Source

Effects of load frequency on the fatigue behavior of notched [±45°]_2s laminated graphite/epoxy composites are investigated. Experimental results are obtained using four frequencies at three load levels. Temperature rises near the center hole are also measured. It is found that when temperature increase during the fatigue test is small, fatigue life increases as the load frequency increases. However, an increase in the near hole temperature results in a reduction in fatigue life. A theoretical model based upon crack propagation in viscoelastic media is presented. The model is modified to account for the temperature effect.

Author Information

Sun, CT

School of Aeronautics and Astronautics, Purdue University, W. Lafayette, Ind.

Chan, WS

School of Aeronautics and Astronautics, Purdue University, W. Lafayette, Ind.

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Details

Developed by Committee: D30

Pages: 418–430

DOI: 10.1520/STP36921S

ISBN-EB: 978-0-8031-4743-0

ISBN-13: 978-0-8031-4495-8

Frequency Effect on the Fatigue Life of a Laminated Composite

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