Experimental Study on Dynamic Fracture Response of Al6063-T6 Under High Rates of Loading
The focus of the current article is to investigate the dynamic fracture toughness of aluminum alloy Al6063-T6 under three-point transient loading conditions. Prior to the dynamic evaluation, three-point bend experiment were also conducted under the quasi-static conditions to evaluate the static fracture toughness using standard formulations available in the literature. Modified Hopkinson pressure bar and ultra-high speed 3D-Digital image correlation (DIC) procedure was utilized to identify the crack initiation time and the crack mouth opening displacement (CMOD) of the specimen under transient loading conditions. To develop the better understanding of the failure mechanism of the specimen, fracture toughness at different strain rates were evaluated. A good agreement between the both Strain gauge measurements and DIC results was observed.
KeywordsCMOD DIC Dynamic fracture toughness MHPB High strain rate
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