抄録
Paper is usually subjected to stress or strain under dynamic conditions concerning its uses. Therefore, it is important to obtain the information of mechanical properties of paper under impact conditions. This paper deals with the impact behavior of paper at different rates of impact elongation.
The summary in this study is as follows.
(1) Time-to-failure of NBKP sheets decreases with increasing rates of impact elongation. Strain-to-failure, however, remains a constant value within the impact velocity range in this study. These results are in agreement with those of static load-elongation tests.
(2) Impulse decreases with increasing rates of impact elongation. The behavior of impulse with impact velocities is similar to that of time-to-failure. On the contrary, energy absorption increases with increasing rates of elongation. This seems to show that the critical velocity by von Kármán exists at higher impact velocity level than that adopted in this study.
