13th International Conference on Fracture June 16–21, 2013, Beijing, China -5- Figure 4. (a) Fatigue crack path of ED-Cu sheet. (b) Relationship between stress intensity factor range calculated from FEM and experimental crack growth rate. 4.2. Fatigue crack growth behavior of ED-Ni Fatigue tests with ED-Ni were also performed to obtain the sensor characteristics of smart patch. The fatigue crack path observed from the drum side was smooth while the opposite side was relatively rough. The fatigue crack growth behavior of ED-Ni is shown in Fig 5 (b). The experimental results were within Paris region and the effect of strain ration was observed. Therefore, the fit curve was analyzed by the Walker equation: m W R K C dN da 1 1 . (6) The calculated parameters were m =3.26, C =4.54×10-12, w =0.556. Figure 5. (a) Fatigue crack path of the ED-Ni sheet. (b) Relationship between stress intensity factor range and fatigue crack growth rate in ED-Ni specimen.
RkJQdWJsaXNoZXIy MjM0NDE=