Loading...
Please wait, while we are loading the content...
Foreign object damage behavior of a sic/sic composite at ambient and elevated temperatures
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bhatt, Ramakrishna T. Gyekenyesi, John P. Pereira, J. Michael Choi, Sung R. |
| Copyright Year | 2004 |
| Description | Foreign object damage (FOD) behavior of a gas-turbine grade SiC/SiC ceramic matrix composite (CMC) was determined at 25 and 1316 C, employing impact velocities from 115 to 440 meters per second by 1.59-mm diameter stell-ball projectiles. Two different types of specimen support were used at each temperature: fully supported and partially supported. For a given temperature, the degree of post-impact strength degradation increased with increasing impact velocity, and was greater in a partially supported configuration than in a fully supported one. The elevated-temperature FOD resistance of the composite, particularly under partially supported loading at higher impact velocities greater than or equal to 350 meters per second, was significantly less than the ambient-temperature counterpart, attributed to a weakening effect of the composite. For fully supported loading, frontal contact stress played a major role in generating composite damage; whereas, for partially supported loading, both frontal contact and backside bending stresses were combined sources of damage generation. The SiC/SiC composite was able to survive higher energy impacts without complete structural failure but suffered more strength affecting damage from low energy impacts than AS800 and SN282 silicon nitrides. |
| File Size | 1183239 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040111389 |
| Archival Resource Key | ark:/13960/t9n34t737 |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Ceramic Matrix Composites Projectiles Structural Failure Impact Velocity Silicon Carbides Mechanical Properties High Temperature Foreign Bodies Stress Intensity Factors Impact Strength Ambient Temperature Silicon Nitrides Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
