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| Effect of the geometric shapes of specimens on impact tensile tests |
| Wei-fang Xu, Xi-cheng Huang, Zhi-ming Hao, Yang Wang, Yuan-ming Xia |
| Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China, Institute of Structural Mechanics, China Academy of Engineering Physics, Mianyang 621900, 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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Received: 02 April 2010
Published: 05 October 2010
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