霍普金森杆
发布网友
发布时间：2022-04-23 07:20
共3个回答
热心网友
时间：2022-04-26 14:15
霍普金森杆 一词源于英语 Hopkinson bar，只有国外的一些资料，你可以参照一下。最后你还可以参考Gray, George T.所著现收藏于美国洛杉矶国家图书馆一本叫《Classic Split-Hopkinson Pressure Bar Testing》的书
Split-Hopkinson pressure bar
The split-Hopkinson pressure bar is an apparatus for testing the dynamic stress-strain response of materials.
History
The split-Hopkinson pressure bar was first suggested by Bertram Hopkinson in 1914 as a way to measure stress pulse propagation in a metal bar. R.M. Davies and H. Kolsky refined Hopkinson's technique by using two Hopkinson bars in series, now known as the split-Hopkinson bar, to measure stress and strain. Later modifications have allowed for tensile, compression, and torsion testing.
Compression testing
For compression testing, two symmetrical bars are situated in series, with the sample in between. The first bar is the incident bar, which is struck by a striker bar ring testing. The striker bar is fired from a gas gun. The second bar is the transmitted bar, which collides with a momentum trap (typically a block of soft metal). Strain gages are mounted on both the incident and transmitted bars.
Tension testing
For tension testing the setup is essentially the same, except the gas gun fires the incident bar away from the sample. The momentum trap is also switched to the side of the incident bar.
References
Gray, George T. "Classic Split-Hopkinson Pressure Bar Testing." Los Alamos National Laboratory.
热心网友
时间：2022-04-26 15:33
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热心网友
时间：2022-04-26 17:08
大多数材料在强度等力学性质方面都表现出某种程度的加载率或应变率敏感性。高幅值短持续时间脉冲和荷载所引起的材料力学性质的应变率效应，对于抗动载的结构设计与分析是非常重要的。这些动载来自常规武器侵彻与爆炸、偶然爆炸和高速撞击等许多军事和民用事件。
对于这些事件的理论分析和数值模拟必须知道材料的高应变率强度、断裂特性和应力——应变关系等本构性质。
而研究材料在脉冲动载作用下的力学性质的实验室设备和实验必须模拟类似现场的应变率条件。
分离式霍普金森杆被公认为是最常用最有效的研究脉冲动载作用下材料力学性质的实验设备。
给你一个霍普金森的网站，上面都有相关的资料介绍和相关文献！
其应用领域从最初测量金属的动态力学性能，发展到现场测量岩石、混凝土、陶瓷、高聚物、炸药、固体推动剂、塑料、复合材料、泡沫材料、减震材料、粘结层、纤维等多种材料的动态力学性能。不仅适用于压缩试验，还能成功地进行拉伸和剪切试验，并且扩展到具有加速度、力与压力传感器标定功能。
参考资料：http://hopkinson.liweikeji.com
