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In-situ x-ray monitoring of damage accumulation in sic/rbsn tensile specimens
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bhatt, Ramakrishna T. Baaklini, George Y. |
| Copyright Year | 1991 |
| Description | The room-temperature tensile testing of silicon carbide fiber reinforced reaction-bonded silicon nitride (SiC/RBSN) composite specimens was monitored by using in-situ x ray film radiography. Radiographic evaluation before, during, and after loading provided data on the effect of preexisting volume flaws (high density impurities, and local density variations) on the fracture behavior of composites. Results from (0)1, (0)3, (0)5, and (0)8 composite specimens, showed that x ray film radiography can monitor damage accumulations during tensile loading. Matrix cracking, fiber-matrix debonding, and fiber pullout were imaged throughout the tensile loading history of the specimens. Further, in-situ film radiography was found to be a helpful and practical technique for estimating interfacial shear strength between the SiC fiber and the RBSN matrix by the matrix crack spacing method. It is concluded that pretest, in-situ, and post-test radiography can provide for a greater understanding of ceramic matrix composite mechanical behavior, a verification of related experimental procedures, and a validation and development of related analytical models. |
| File Size | 6747123 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910013089 |
| Archival Resource Key | ark:/13960/t2c876m0q |
| Language | English |
| Publisher Date | 1991-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Damage Assessment Ceramic Matrix Composites Fracture Mechanics Estimating Silicon Carbides Shear Strength Fiber Composites Mechanical Properties Matrix Methods Defects Radiography Cracks X Rays Impurities Failure Analysis Silicon Nitrides Mathematical Models Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
