Developing a Small Equipment for Damage Simulation of Ceramic Based Composites by a High Velocity Projectile Impact

近年来，陶瓷基复合材料在空间和能源领域得到了广泛的应用。在这种应用中，材料必须受到高速物体的冲击。由于目前还没有开发出适用于陶瓷基复合材料的高速冲击试验系统，冲击现象至今还没有得到澄清。本研究的目的是开发一种适用于陶瓷基复合材料的高速冲击试验系统，该系统具有以下特点：(1)推进剂加速弹丸；(2)可以测量各种类型弹丸的速度；(3)多种类型的陶瓷基复合材料可以作为靶材，本系统的特点是：(1)推进剂和氦气作为加速力；(2)直径8 mm、长度20 mm的尼龙弹托可以加速到2.5公里/S；(3)可以测量直径4 mm的钢和铁氧体陶瓷球的速度；(4)可以测量冲击波速度和质点速度；(5)可以通过窗口观察靶材的撞击行为。(6)一人一天可操作该系统两次。

Recently ceramic based composites have been developed for space and energy application. In such application, the materials must be impacted by high velocity objects. Since suitable high velocity impact-test systems applicable for ceramic-based composites are not developed, impact phenomena have not been clarified until now.The aim of this study is to develop a system applicable for ceramic-based composites with the following characteristics : (1) a projectile is accelerated with propellant, (2) velocity of various types of projectiles can be measured, (3) many types of ceramic-related composites can be used as the target materials, and (4) the products of the projectiles velocity and size is over 10 mm km/s.The characteristics of the developed system in this study is as follows : (1) propellant and helium are used as the acceleration force, (2) nylon sabot having 8mm-diameter and 20mm-length can be accelerated unto 2.5km/s, (3) the velocity of a 4mm-diameter steel and a ferrite ceramic sphere can be measured, (4) shock wave velocity and particle velocity can be measured, (5) impact behavior of target materials can be observed through windows, and (6) one person can be operate this system twice a day.