The objective of this study is to investigate the properties of fatigue crack growth in GLARE3-5/4 fiber/metal laminate and the validity of methods for analyzing the fatigue crack growth of fiber/metal laminates. GLARE3-5/4 consists of five thin sheets of 2024-T3 aluminum alloy and four layers of (0/90) glass/epoxy. Centrally notched specimens were fatigue tested under constant amplitude loading and crack length was measured using the DC potential-drop method. The size of the delamination produced between aluminum alloy sheets and fiber-adhesive layers was measured from ultrasonic C-scan pictures taken around the fatigue crack. The test results indicated the features of fatigue crack growth in GLARE3-5/4. The validity of two methods for analyzing the fatigue crack growth of fiber/metal laminates is discussed based on the test results.

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