Search Results for crack propagation

Fig. 2 Schematic of typical crack propagation rate as a function of crack tip stress-intensity behavior illustrating the regions of stages 1, 2, and 3 crack propagation, as well as identifying the plateau velocity and the threshold stress intensity More

Fig. 5.9 XSP of crack tip showing successive stages of crack propagation in a thermally embrittled stainless steel. Source: Ref 14 , 15 More

Fig. 1.2 Schematic diagram of typical crack propagation rate as a function of crack-tip stress-intensity behavior illustrating the regions of stage 1, 2, and 3 crack propagation as well as identifying the plateau velocity and the threshold stress intensity More

Fig. 9.38 Relation of crack initiation to crack propagation and failure. Source: Ref 9.38 More

Fig. 13 Stages I and II of fatigue crack propagation More

Fig. 7 Specimens employed in fatigue crack propagation studies. (a) Single-edge-notch specimen. (b) Compact-tension specimen More

Fig. 8 Schematic illustration of the three distinct regimes of crack propagation rate observed in fatigue testing under constant amplitude loading conditions. For polymers, typical values of m range from 3 to 50, depending on the polymer system. More

Fig. 11 Comparison of fatigue crack propagation behavior in the Paris regime for several amorphous and semicrystalline polymers. Note enhanced fatigue resistance of the semicrystalline polymers. PC, polycarbonate; PMMA, polymethyl methacrylate; PPO, polypropylene oxide; PVF, polyvinyl formal More

Fig. 12 Fatigue crack propagation behavior for a rubber-toughened epoxy. The addition of rubber decreases the slope, m , at high crack growth rates due to toughening mechanisms and retarded crack growth. CTBN, carboxylterminated polybutadiene acrylonitrile rubber; MBS, methacrylate-butadiene More

Fig. 3 Thermal fatigue failure and conventional fatigue crack propagation fracture during reversed load cycling of acetal. Source: Ref 10 More

Fig. 6 Crack propagation through a craze surrounded by a pair of shear bands (an epsilon crack) in polycarbonate. Source: Ref 17 More

Fig. 8 An S-shaped fatigue crack propagation. K , stress-intensity factor; K c , fracture toughness curve indicating its three characteristic regions. More

Fig. 9 Fatigue crack propagation behavior of various polymers. PSU, polysulfone; PMMA, polymethyl methacrylate; PC, polycarbonate; PS, polystyrene; PVC, polyvinyl chloride. Source: Ref 48 More

Fig. 10 The rate of fatigue crack propagation of injection-molded glass-reinforced polyvinyl chloride composites containing 10 and 30% glass as a function of the energy release rate, J I . Arrows indicate the critical energy release rate, J Ic , for each. More

Fig. 11 Fatigue crack propagation rates ( da / dN ) at 10 Hz as a function of stress-intensity factor range (Δ K ) in low-density polyethylene. da / dN decreases with increasing Δ K . Source: Ref 51 More

Fig. 15 Relationship between the average crack propagation rate and the oxidation (that is, dissolution and oxide growth) kinetics on a straining surface for several ductile alloy/aqueous environment systems More

Fig. 17 Variation in the average crack propagation rate in sensitized type 304 stainless steel in water at 288 °C (550 °F) with oxygen content. Data are from both constant extension rate (CERT) tests, constant load, and field observations on boiling water reactor piping. IGSCC, intergranular More

Fig. 26 Typical, subcritical crack propagation rate versus stress intensity relationship. Stress intensity, K , is defined as K = A σ π C / B , where s is the total tensile stress, C is the crack length, and A and B are geometrical constants. More

Fig. 29 Comparison between observed and theoretical crack propagation rate/strain rate ( a ˙ / ε ˙ ) relationships for furnace-sensitized type 304 stainless steel in water/0.2 ppm oxygen at 288 ° C (550 ° F) More

Fig. 32 Schematic representations of crack propagation by the film rupture model. (a) Ref 50 . (b) Ref 56 and 57 More