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首页> 外文会议>SAMPE conference and exhibition >MODELING FOREIGN OBJECT DAMAGE TO CVI MI SiC/iBN/SiC, N720/AS OXIDE/OXIDE, AND HIPERCOMPTM 2D SiC/SiC CERAMIC COMPOSITE COMPONENTS IN GAS TURBINE ENGINES AT AMBIENT AND ELEVATED TEMPERATURES
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MODELING FOREIGN OBJECT DAMAGE TO CVI MI SiC/iBN/SiC, N720/AS OXIDE/OXIDE, AND HIPERCOMPTM 2D SiC/SiC CERAMIC COMPOSITE COMPONENTS IN GAS TURBINE ENGINES AT AMBIENT AND ELEVATED TEMPERATURES

机译：在室温和高温下模拟燃气轮机中CVI MI SiC / iBN / SiC，N720 / AS氧化物/氧化物和HIPERCOMPTM 2D SiC / SiC陶瓷复合材料的外来物体损伤

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The inherent toughness of ceramic matrix composites in advanced gas-turbine engines mustbe predictable under impact from small foreign objects to lower the amount of full scale testingneeded to produce robust designs. Fiber/matrix/architecture properties of the composites, and adamage evolution based progressive failure code (GENOA) that can be used for a full range ofcomposite architectures coupled with an explicit FEM impact code (LS-DYNA) were used tosimulate impact and residual 4-point flexural strength and residual high cycle fatigue life ofceramic engine materials. This approach uses physics-based mechanics coupled at the micro andmacro scale boundaries. The benefit of this technique is that the root cause of damageadvancement at the micromechanical level could be understood and simulations could beperformed to assess better damage tolerant structures. Steel projectiles with a diameter of 1.59mm were used to impact the composites at speeds from 100-400 m/s (Mach 0.3-1.2) and theresults are comparable with prior test data for a 2-D 5 Harness Sylramic iBN CVI MI SiC CMCat 25°C, for a 2-D 8 Harness N720/AS oxide oxide CMC at 25°C , and for a HiPerComp? 2DHiNicalon Type S? SiC / SiC CMC at 1200°C. Simulations also gave insight to themicromechanical damage progression and were comparable with test data.
机译：先进燃气涡轮发动机中陶瓷基复合材料的固有韧性必须 在小异物的影响下可预测，以降低全面测试的数量 需要进行可靠的设计。复合材料的纤维/基体/建筑特性，以及 基于损伤演化的渐进式故障代码（GENOA），可用于所有范围的 组合体系结构与显式FEM冲击代码（LS-DYNA）一起用于 模拟冲击和残余4点弯曲强度以及残余高周疲劳寿命 陶瓷发动机材料。这种方法使用了基于物理的力学，在微观和微观上耦合。 宏观尺度边界。这种技术的好处是造成损坏的根本原因 可以理解微机械水平的进步，并且可以进行仿真 执行以评估更好的耐损伤结构。直径为1.59的钢弹 毫米以100-400 m / s（0.3-1.2马赫）的速度撞击复合材料， 结果与2-D 5线束Sylramic iBN CVI MI SiC CMC的先前测试数据相当 对于25°C的2-D 8线束N720 / AS氧化物CMC，以及对于HiPerComp？ 2D HiNicalon Type S？ 1200°C时的SiC / SiC CMC。模拟也为 微机械损伤的进展，与试验数据相当。

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