环氧树脂微柱的高应变率压缩
High strain rate compression of epoxy micro pillars
摘要：
由于缺乏合适的仪器，迄今为止，利用微柱压缩试验研究材料的高应变率力学行为一直受到阻碍。介绍了一种新型的高应变率微柱压缩装置。的高速测试进行的冲击配置的基于纳米压痕装置，是仪表与力传感能力，通过压电负载单元。这是必要的，因为相当大的惯性效应使得样品上的实际施加力远高于致动力。所提出的新技术被成功地应用于研究环氧树脂的力学行为在很宽的应变率范围内。结果表明，一个显着的应变速率敏感性，以及相关的相同的材料在宏观尺度上，验证了新的设置。
英文摘要：
The study of the high strain rate mechanical behaviour of materials using micropillar compression tests has been hindered so far due to the lack of suitable instrumentation. In the present study, a novel high strain rate micropillar compression set-up is introduced. The high speed tests are carried out with the impact configuration of a pendulum-based nanoindentation device that was instrumented with force-sensing capability by means of a piezoelectric load cell. This is necessary due to the considerable inertia effects that make the actual applied force on the sample much higher than the actuated one. The proposed novel technique was successfully applied to study the mechanical behaviour of an epoxy resin over a wide range of strain rates. The results reveal a significant strain rate sensitivity that correlates well with that obtained for the same material at the macroscale, validating the novel set-up.
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