Abstract
Under a Phase II Navy SBIR program, Materials Research & Design (MR&D) performed an integrated analytical, fabrication and experimental program in order to develop foreign object damage (FOD) resistant silicon carbide (SiC) fiber-based ceramic matrix composites (CMCs), specifically 2D tape SiC/SiC. MR&D believes strongly that the most efficient approach towards the development of FOD-resistant CMCs is to develop a mathematical simulation of the impact event which can be correlated to measured responses and observed failures. Once correlated with available test data, the developed math model was used as part of an Integrated Computational Materials Engineering (ICME) approach to analytically investigate modifications to baseline CMC material in an attempt to identify which properties best influenced FOD resistance. The best candidate material modifications were then selected for fabrication and experimental validation. When considering all of the numerical and empirical data (visible damage, rebound velocity (energy absorption), strain data, NDE inspection and residual strength testing), all of the MR&D-proposed material modifications demonstrated improved FOD resistance when compared to the baseline CMC material.
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