Fig. 6. (A) Fatigue rupture of a wallaby tail tendon subjected to cyclic tensile stress of 40 MPa at 5.3 Hz (from Wang et al., 1995). (B) Time of rupture for various wallaby tendons versus their `stress in life' when subjected to a creep failure stress of 50 MPa (least-squares slope and 95% confidence intervals shown). (C) Time of rupture for various wallaby tendons when each tendon is subjected to its own `stress in life', showing that all fail in about 5.5 h (least-squares regression slope and 95% confidence intervals shown). (D) Symbol key for the wallaby tendons tested to creep failure and their `stress in life (= 0.3 MPa A_m/A_t). B-D are from Ker et al. (2000).