Effect of the geometric shapes of specimens on impact tensile tests |
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| Authors: | Wei-fang Xu Xi-cheng Huang Zhi-ming Hao Yang Wang and Yuan-ming Xia |
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| Institution: | (1) Center for Advanced Material, University of Tuskegee, Tuskegee, AL 36088, USA;(2) Department of Modern Mechanics, University of Science &; Technology of China, Hefei, Anhui, 230027, People’s Republic of China |
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| Abstract: | The geometric shapes of specimens are important in impact tensile tests because geometric shapes determine the stress states
of the specimens, and precise geometric shapes can obtain proper material properties without non-material factors. The aim
of this study was to investigate the 1D form of the stress by changing the length-to-diameter (L/D) ratios of specimens. The experiments were carried out on a split Hopkinson tensile bar (SHTB)—rotating disk indirect bar-bar
tensile impact apparatus. The L/D ratios of the LY12CZ specimens used in the test ranged from 1 to 5. Results show that the specimens can be used to obtain
exact parameters of materials under the proposed conditions when the L/D ratio is greater than 2. This is because the longer length will reduce or eliminate the effects of the interfaces. |
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| Keywords: | Impact tensile Split Hopkinson tensile bar （SHTB） Length-to-diameter （L/D） ratios |
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