Abstract

Mixed mode crack growth behaviour was studied. Experiments were conducted on Compact Tension Shear (CTS) specimens at different angles including both mode I and mode II test conditions, and in both static and fatigue conditions. In addition to these tests overload tests were carried out to study the effect of mode I, mixed mode and mode II overload on subsequent mode I fatigue crack propagation. The experiments were conducted on D16AT Al alloy. Fractured specimens were analysed under a scanning electron microscope. The effect of frequency and load ratio was analysed at the microscopic scale in terms of striation spacing.

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