OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1992 · 175 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsFinite Element AnalysisMechanical Behavior Of MaterialsCeramic Matrix CompositesComposite MaterialsFiber-reinforced CompositesMechanics Of Composite MaterialsMetal Matrix CompositesStress-strain BehaviorComputational SimulationMicromechanicsMicromechanics Of CompositesSilicon Carbide CompositesSilicon Carbide Matrix CompositesStress-strain CurveStress-strain RelationsStress-strain Relationships
Computational simulation procedures are used to identify the key deformation mechanisms for (0)(sub 8) and (90)(sub 8) SiC/Ti-15 metal matrix composites. The computational simulation procedures employed consist of a three-dimensional finite-element analysis and a micromechanics based computer code METCAN. The interphase properties used in the analysis have been calibrated using the METCAN computer code with the (90)(sub 8) experimental stress-strain curve. Results of simulation show that although shear stresses are sufficiently high to cause the formation of some slip bands in the matrix concentrated mostly near the fibers, the nonlinearity in the composite stress-strain curve in the case of (90)(sub 8) composite is dominated by interfacial damage, such as microcracks and debonding rather than microplasticity. The stress-strain curve for (0)(sub 8) composite is largely controlled by the fibers and shows only slight nonlinearity at higher strain levels that could be the result of matrix microplasticity.