PIRファイバを用いた超高速圧縮試験における材料の温度上昇測定法の検討

抄録

According to the past research work done by the authors, it is revealed that the infrared detector possesses an extremely-high responsiveness and it can be applied to the temperature measurement at the strain rate over 10⁵/s. For the purpose to apply the detector to the Taylor impact test which can achieve the strain rate over 10⁵/s, it is necessary to protect the damage of the detector from the secondary impact of the specimen. On the other hand, because the deformation of specimen is non-uniform during Taylor impact test, the accurate measurement of change in temperature at one extremely-small area of specimen is necessary. In this research work, a PIR fiber is introduced into temperature measurement system to protect the detector and get the temperature rise at only one small area of specimen. By a use of the temperature measurement system with the fiber, the change in temperature will be measured during an impact compressive test using the apparatus based on miniature split Hopkinson pressure bar method.