Influence of strain rate on mechanical properties of 6061-T6 aluminum under uniaxial and biaxial states of stress |
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| Authors: | Kenneth G Hoge |
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| Institution: | 1. Materials Engineering Section of the Mechanical Engineering Department of the University of California's Lawrence Radiation Laboratory, Livermore, Calif.
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| Abstract: | A technique is presented for determining mechanical properties of materials under dynamic tensile loads. A Dynapak metalworking machine was modified into a test fixture capable of producing the required dynamic loads for uniaxial and certain biaxial tensile tests. Results from uniaxial dynamic tests on 6061-T6 aluminum alloy are presented and compared to “static” data obtained from a universal testing machine. The dependence of tensile strength on strain rate and the augmenting effect of temperature on this dependence can be seen. The results of biaxial tests are described in terms of a modified form of the distortion-energy failure theory. |
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