On geometric shape of the specimen in impact tensile test
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摘要: 应用分离式Hopkinson拉伸实验技术研究了圆柱形冲击拉伸试件的长径比(L/D)对实验结果的影响，其中长径比从1到5。研究结果表明：对于LY12材料,L/D2.67的试件满足材料实验的要求，L/D2不能得到准确的材料参数。Abstract: Effects of the length-to-diameter (L/D) ratios of specimens on the experimental results were studied by using a split Hopkinson tensile bar, rotating disk indirect bar-bar tensile impact apparatus. The length-to-diameter ratios of the LY12 specimens used in the test range from 1 to 5. Results show that the specimens of L/D2.67 can be used to obtain exact parameters of materials under the proposed conditions, but the specimens of L/D2 can not be used in impact tensile test.
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Key words:
- solid mechanics /
- length to diameter ratio /
- impact tensile /
- specimen /
- strain rate
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