A synergistic model of stress and oxidation induced damage and failure in silicon carbide‐based ceramic matrix composites
U. Santhosh, Jalees Ahmad, G. Ojard, Yasser Gowayed
Abstract
Abstract A micromechanics‐based modeling approach that allows for the simultaneous consideration of deformation, damage, and oxidation associated with each constituent of silicon carbide (SiC)‐based ceramic matrix composites (CMC), including the fiber, fiber coating, and matrix, is described. Chemical kinetics models from the literature are combined with a progressive damage model. Rupture predictions of unnotched and notched stress‐hold (creep) specimens are compared with experimental measurements from a SiC/SiC CMC to assess the efficacy of the modeling approach. Techniques of improving creep rupture life are explored using the model.
Topics & Concepts
Silicon carbideMicromechanicsMaterials scienceComposite materialCeramic matrix compositeCreepCeramicStress (linguistics)FiberMatrix (chemical analysis)Deformation (meteorology)Composite numberLinguisticsPhilosophyAdvanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced materials and composites