| 杆式冲击装置测定材料动态J积分 |
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| 引用本文： | 唐春安,徐小荷. 杆式冲击装置测定材料动态J积分[J]. 实验力学, 1988, 3(4) |
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| 作者姓名： | 唐春安 徐小荷 |
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| 作者单位： | 东北工学院，东北工学院 |
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| 摘 要： | 本文介绍了一种研究材料动态断裂韧度的实验技术。该方法采用冲击杆对常规三点弯曲试件进行动态加载。由于长杆条件下存在荷载、位移及冲击速度之间的定量关系,试验中只需对荷载的时间历程进行测定,就能间接地计算出位移和J积分值。与目前广泛使用的示波摆锤(落锤)冲击法相比,不仅测试过程明显简化,而且力学分析的基础也更为可靠。
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| 关 键 词： | 冲击试验 动态J积分 |
Measurement of Dynamic J-Integral of Materials on a Bar-Impact Testing, Machine |
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| Fang Chunan Xu Xiaohe. Measurement of Dynamic J-Integral of Materials on a Bar-Impact Testing, Machine[J]. Journal of Experimental Mechanics, 1988, 3(4) |
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| Authors: | Fang Chunan Xu Xiaohe |
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| Affiliation: | Northeast University of Technology |
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| Abstract: | An experimental technique for measuring dynamic fracture toughness under the action of stress wave is described in this paper. A 3-point bending specimen is loaded dynamically with a Bar-Impact Testing Machine. Since there exists relationship among load, displacement and impact velocity for long bar, the displacement and J-integral can be calculated from recorded load-time curve. The testing process becomes much simpler and the basis for analysis is much more reliable in comparison with the widely used pendulum impact method. |
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| Keywords: | impact testing dynamic J-integral. |
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