Search material components for developing high anti-impact behavior and easy machining

在本研究中，我们进行了冲击试验，并利用高速弹丸冲击下的三维（3D）测量研究了弹丸材料对CFRP冲击现象的影响。主要揭示了以下两点：第一，(1)弹道极限射程受弹丸动能影响，该动能与弹丸直径成正比。弹丸变形时，其变形能之小不可忽略。第二，（2）CFRP吸收能量的主要机制是其变形。碳纤维复合材料由具有大失效应变的高强度碳纤维和可变形树脂组成，可以吸收弹丸的较大动能。我们可以发现一个大趋势，即高能量耗散的树脂往往表现出较低的推力。 CFRP 可以兼具高抗冲击性和易加工性。

In this study, we conducted impact tests and investigated the effects of projectile materials on impact phenomena of CFRP by using three-dimensional (3D) measurement under high-velocity projectile impact. The following two were mainly revealed: the first is that(1) the ballistic limit range was affected by the kinetic energy of the projectile and this kinetic energy was proportional to the diameter of the projectile. When projectile was deformed, its deformation energy was not negligible small. The second is that(2) the main mechanism of energy absorption in CFRPs is their deformation. CFRPs, consisting of high-strength carbon fiber having large-failure-strain and deformable resin, could absorb large kinetic energy of a projectile. We can find a large trend that highly energy dissipated resins tended to show lower thrust-forces. Both of high resistivity against impact and easy-machining can be compatible in a CFRP.