Study on creep damage and crack growth for TC11 under complex stress loading

In order to investigate the creep damage and crack growth of TC11, we established finite element model based on ductility exhaustion constitutive model. This paper uses uniaxial test TC11 at 500℃ as a reference studies effect initial dimensions CT specimen surface specimen. The length has significant material. larger length, higher rate, tip equivalent stress triaxiality. greater influence for deep specimens( 0 / W =0.6, =0.7) than that shallow =0.3, =0.4, =0.5). When intensity factor K π/2 deepest location is same, each in depth direction same time approximately twice much direction. With increase size, rate decreases gradually. And depth.