Transient Creep Behavior of a Plain Woven SiC Fiber/SiC Matrix Composite(<Special Issue>Recent Advances in Materials and Processing (I))

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The present work investigates the transient creep behavior of a plain woven Tyranno^<TM> Lox-M (Si-Ti-C-O) fiber/SiC matrix composite at 1473K in air. Tensile creep tests were carried out under a constant load between 80 and 160MPa. A creep strain rate is generally represented by ε∝σ^n with a constant stress exponent, however the stress exponent decreased with time for this composite material. Monotonic tensile tests were also conducted for loading rates of 0.03, 0.3, and 3 kN/min in order to investigate the effect of creep strain on tensile stress/strain behavior. Based on the empirical transient creep equation and creep-hardening model, stress/strain curves under monotonic tensile loading were predicted. A good correlation was obtained between the predicted and measured composite stress/strain curves using strain-hardening model.
社団法人日本機械学会の論文
2005-10-15