13th International Conference on Fracture June 16–21, 2013, Beijing, China -7- in (Table 2). Table 2 Initial and optimized coefficients Elastic-inelastic parameters Model parameters E (MPa) ν α z K b s ko (MPa) Qs (MPa) h1=h2=… =h5 h6 Cg (MPa) ag Initial 215000 0.32 1 20 50 24.5 340 100 1 1.7 75100 6 Optimized 215000 0.32 1 20 50 14.5 267.5 397.6 1 6.3 33830 8.71 Damage parameters Model parameters Ss s o ws d1 d2 0γ Initial 2 0.95 1 1 1.4 1.25 optimized 2 0.95 1 1 1.4 1.25 One of the main reasons which promotes this association is that both algorithms are parallelizable as shown in [2,3]. This allows gaining in computation time by exploiting computer multiprocessor. The experimental recorded fatigue lives are 38, and 14 cycles for TC and TT90, respectively. The model predicts these lives faithfully giving therefore 38, and 12 cycles in TC and TT90, respectively. Figure 2 Evolution of the overall stress during TC and TT90 up to the final fracture Figure 2 represents the typical evolutions of the maximum overall stress (pick stress value for each cycle) versus cyclic time using the same maximum von-Mises equivalent macro-strain for the two cyclic loading paths (TC and TT90). The predicted responses describe properly the experimental
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