A low cycle fatigue test device for micro-cantilevers based on self-excited vibration principle.
A low cycle fatigue test device for micro-cantilevers based on self-excited vibration principle.
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DOI：
10.1063/1.4898668
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Mingjing Qi;Zhiwei Liu;Xiaojun Yan
中科院分区：
文献类型：
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作者：
Mingjing Qi;Zhiwei Liu;Xiaojun Yan
介绍了一种微悬臂梁低周疲劳试验装置。该装置的工作原理是基于微悬臂梁在直流电压作用下在两个电极之间产生自激振动的现象。与以往的装置相比，该装置结构简单，可在无缺口试件上产生较大的应变幅，并可实现一批试件的同时测试。对42个微悬臂梁试样进行了疲劳试验，其疲劳断口呈现出典型的低周疲劳特征。因此，该装置是非常有吸引力的未来疲劳研究的微尺度结构。
This paper reports a low-cycle fatigue test device for micro-cantilevers, which are widely used in micro scale structures. The working principle of the device is based on the phenomenon that a micro-cantilever can be set into self-excited vibration between two electrodes under DC voltage. Compared with previous devices, this simple device can produce large strain amplitude on non-notched specimens, and allows a batch of specimens to be tested simultaneously. Forty-two micro-cantilever specimens were tested and their fatigue fracture surfaces exhibit typical low cycle fatigue characteristics. As such, the device is very attractive for future fatigue investigation for micro scale structures.