Effect of loading rate on the plane stress fracture toughness properties of an aluminum alloy
نویسنده
چکیده
The effect of loading rate on the plane stress fracture toughness properties of a 3.2-mm thick 2219-T87 aluminum alloy plate was investigated with center-cracked panels. Plane-stress J-resistance curves were generated at a constant displacement rate of 10-6 and 5.7 m s-l. Dynamic fracture testing was performed with a coupled pressure plates technique. Fracture initiation and propagation toughnesses were found to increase with an increased loading rate. The toughness increase was found to be related to the rate sensitivity characteristics and intrinsic ductile behavior of the aluminum alloy.
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