13th International Conference on Fracture June 16–21, 2013, Beijing, China -8- 20 52 88 19.05 7 16 R25 R1 Figure 8. Geometry and typical meshes for initial (left) and advanced (right) crack positions ‐0.8 ‐0.6 ‐0.4 ‐0.2 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 50 100 150 200 250 300 350 400 450 500 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load (1) 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 50 100 150 200 250 300 350 400 450 500 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load 4(a) 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 20 40 60 80 100 120 140 160 180 200 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load 4(c) ‐0.8 ‐0.6 ‐0.4 ‐0.2 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 20 40 60 80 100 120 140 160 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load (3) 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 20 40 60 80 100 120 140 160 180 200 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load 4(b) 0 0.2 0.4 0.6 0.8 1 1.2 0 100 200 300 400 500 600 700 800 0 20 40 60 80 100 120 140 160 180 200 Normalised load Temperature (degrees C) Time (s) Temperature Normalised load 4(d) Figure 9. Definition of TMF cycle 1, 3, 4a, 4b, 4c and 4d 7. Simulation Results Compared With Test Results The test and simulation results are presented as relative da/dN against Kmax in Figure 10 and Figure 11. The da/dN value is total effective da/dN per TMF cycle. The Kmax value is the maximum K for the TMF load cycle. The load and temperature variations in cycles 1 and 3 are the same – the difference being that cycle 1 has duration of 464s compared to 300s for cycle 3. For both these load cycles, the applied load is
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