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首页> 外文会议>Mechanical properties and performance of engineering ceramics and composites VII >EFFECTS OF TARGET SUPPORTS ON FOREIGN OBJECT DAMAGE IN AN OXIDE/OXIDE CMC
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EFFECTS OF TARGET SUPPORTS ON FOREIGN OBJECT DAMAGE IN AN OXIDE/OXIDE CMC

机译：目标支持对氧化物/氧化物CMC中异物损伤的影响

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摘要

Foreign object damage (FOD) aspects of an oxide/oxide ceramic matrix composite (CMC) were determined using spherical steel ball projectiles in impact velocity ranging from 100 to 340 m/s. The oxide/oxide CMC test targets were ballistically impacted at a normal incidence angle while sustained in cantilever support. Surface and subsurface impact damages were in the forms of craters, fiber breakage, delamination, cone cracks, and backside protrusion, typically observed in many CMCs in their ballistic impact responses. Qualitative impact damage was also assessed through post-impact residual strength measurements. Compared to two other types of target supports (full and partial supports), the cantilever support configuration resulted in the greatest impact damage of all the three. The impact damage in cantilever support is believed to have been involved both by quasi-static impression and by stress wave interactions, while the impact damage in partial and full supports was involved mainly by quasi-static dynamic impression.
机译：使用球形钢弹丸以100至340 m / s的冲击速度确定氧化物/氧化物陶瓷基复合材料（CMC）的异物损坏（FOD）方面。氧化物/氧化物CMC测试目标在法向入射角上受到弹道冲击，同时保持在悬臂支撑中。表面和表面下的冲击破坏以弹坑，纤维断裂，分层，锥裂和背面突出的形式出现，通常在许多CMC的弹道冲击响应中观察到。还通过冲击后残余强度的测量来评估定性冲击损伤。与其他两种类型的目标支架（全部和部分支架）相比，悬臂支架配置对这三种支架造成最大的冲击破坏。据信，悬臂支架的冲击损伤既涉及准静态压痕，又涉及应力波相互作用，而部分和全部支架的冲击损伤主要涉及准静态的动压痕。

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