A Novel Methodology for Calculating Crack Opening Stress under Tension-Compression Cyclic Load

Figure 3

Schematic of boundary and constraint. (a) Due to the symmetry of structure, it is necessary to impose symmetrical constraints on the symmetrical plane. (b) To prevent the crack surface from penetrating, a contact pair is established with the crack and notch through the rigid line; therefore, it is necessary to impose fixed constraints on the rigid line.