A study on measuring distribution of temperature for instrumented Taylor impact test
A study on measuring distribution of temperature for instrumented Taylor impact test
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仪器化泰勒冲击试验温度分布测量研究
DOI：
10.1051/epjconf/202125001028
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发表时间：
2021
影响因子：
--
通讯作者：
Chong Gao and Takeshi IWAMOTO
中科院分区：
文献类型：
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作者：
大城織人;吉岡英樹;飯塚悟;Chong Gao and Takeshi IWAMOTO
由于大量文献报道红外探测器具有极高的响应性，因此将红外探测器应用于高应变率下的测试是一个挑战。然而，目前关于温度测量的研究工作主要集中在分离式霍普金森压杆实验中应变速率为103 s-1的温度测量上。为了评价材料在较高应变率范围内的热机械行为，需要建立一种泰勒冲击试验温度的测量方法。此外，还应考虑使用光纤来保护探测器免受样品撞击的任何损坏，并实现点状区域的测量。本文设计了一种基于红外探测器和PIR光纤的光学测温系统。然后，将所设计的系统引入到基于最近提出的仪器化泰勒冲击试验的装置中。在试验过程中，测量了纯铝表面局部点的温升。在此基础上，提出了由热传导方程计算温度分布的方法。
It is a challenge to apply the infrared detector to a test at higher strain rate because lots of articles report that the detector has an extremelyhigh responsiveness. However, all the research works about the measurement of temperature is focused on 103s-1of the strain rate achieved by the split Hopkinson pressure bar test. To evaluate the thermo-mechanical behaviour of materials in higher strain rate range, a method for measuring the temperature in Taylor impact test is required to establish. Additionally, a use of the fiber should be considered to protect the detector from any damages by the impact of the specimen and realize the measurement in the point-like area. In this study, an optically-measuring system of temperature with the infrared detector and PIR fiber is designed. Then, the designed system is introduced into the apparatus based on the instrumented Taylor impact test proposed recently. The temperature rise at a local point on the surface of pure aluminium is measured during the test. Then, a calculation for distribution of temperature from a heat conduction equation is proposed.