Failure mechanisms in laminates of silicon carbide/calcium-aluminosilicate ceramic composite |
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| Affiliation: | 1. Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United States;2. Department of Radiology, Stanford University, Stanford, CA 94305, United States;1. RWTH Aachen University, Faculty of Mechanical Engineering, Institute for Combustion Technology, Templergraben 64, Aachen 52056, Germany;2. Technical University of Darmstadt, Department of Mechanical Engineering, Energy- and Power Plant Technology, Otto-Berndt-Straße 3, Darmstadt 64287, Germany;3. Ruhr University Bochum, Chair of Thermal Turbomachines and Aeroengines, Universitätsstraße 150, Bochum 44801, Germany;4. University of Edinburgh, School of Engineering, Institute of Multiscale Thermofluids, The King’s Buildings, Mayfield Road, Edinburgh, EH9 3FD, United Kingdom;5. Technical University of Darmstadt, Department of Mechanical Engineering, Reactive Flows and Diagnostics, Otto-Berndt-Straße 3, Darmstadt 64287, Germany;6. Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of reactive Thermo-Fluid Systems, Otto-Berndt-Straße 2, Darmstadt 64287, Germany;1. Technical University of Darmstadt, Department of Mechanical Engineering, Reactive Flows and Diagnostics, Otto-Berndt-Str. 3, Darmstadt 64287, Germany;2. Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of Reactive Thermo-Fluid Systems, Otto-Berndt-Str. 2, Darmstadt 64287, Germany;3. The George Washington University, Washington DC, USA;4. Barlow Combustion Research, Livermore, USA;1. Department of Mechanical Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8550, Japan;2. Department of Computer Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8550, Japan |
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| Abstract: | A systematic investigation was conducted of failure mechanisms and their quantitative effects on the overall mechanical behaviour in laminates of a fibre-reinforced ceramic-matrix composite (silicon carbide/calcium-aluminosilicate) under static tensile loading. Three laminates were investigated: quasi-isotropic, cross-ply and angle-ply. Matrix cracking initiated in all laminates well below the proportional limit of the stress/strain relationship. This cracking grew in a random manner with increasing load; however, no continuous crack was observed across the whole width of the specimen. The measured Young's modulus and Poisson's ratio agreed well with the corresponding values from classical laminated plate theory, but this was not the case for the first ply failure and ultimate strengths. |
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