Characterization and simulation of foreign object damage in curved and flat SiC/SiC ceramic matrix composites

• Published in: Ceramics international Vol. 45; no. 2; pp. 2635 - 2643
• Main Authors: Presby, Michael J., Mansour, Rabih, Manigandan, K., Morscher, Gregory N., Abdi, Frank, Godines, Cody, Eftekharian, Amirhossein, Choi, Sung R.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2019
• Subjects: B. Composites; B. Non-destructive evaluation; C. Electrical properties; Foreign Object Damage; B. Composites; B. Non-destructive evaluation; Foreign Object Damage; C. Electrical properties
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2018.10.207

Foreign object damage (FOD) phenomenon of flat and curved Hi Nicalon MI SiC/SiC ceramic matrix composite (CMC) was determined at ambient temperature subject to impact of 1.59 mm steel ball projectiles at a velocity of approximately 340 m/s. The differences in damage morphology between the flat and curved specimens was investigated through the use of electrical resistance (ER), micro-computed tomography (micro-CT), and optical microscopy. The experimental test data was then simulated with GENOA MS-PFA and LS-Dyna using rebound velocity/energy absorbed and damage size as a means to correlate experimental and simulation. The effect of curvature has a profound effect on the impact damage morphology, and must be accurately accounted for when designing full scale CMC components.