Use the Stress-Based node to define the fatigue model selection and parameters for stress-based fatigue evaluation. The Stress-Based feature can be applied to domains, boundaries, edges, or points.

See Common Physics Interface and Feature Settings and Nodes for information about the Model Input.

From the Physics interface list select the physics interface where the load cycle is simulated.

If you select a Shell interface, also select a Through-thickness location — From shell interface, Top, or Bottom. This determines from which position in the shell stresses or strains are taken for fatigue evaluation. When you select From shell interface, the local z-coordinate given in the Default Through-thickness Result Location section in the settings for the Shell interface is used.

Select a Criterion — Findley, Matake, Normal Stress, or Dang Van. This specifies the fatigue model to be evaluated. See Findley Criterion, Matake Criterion, Maximum Normal Stress Criterion, and Dang Van for details about these models.

If Findley or Matake is selected as the Criterion, then under Fatigue parameters the Normal stress sensitivity coefficient k as a default takes values From material. For User defined enter other values or expressions in the field as needed.

For Criterion options Findley or Matake and Normal stress, the Limit factor f also takes values From material. For User defined enter other values or expressions in the field as needed.

If Dang Van is selected as the Criterion, the Hydrostatic stress sensitivity coefficient αDV and the Limit factor βDV takes values From material. For User defined enter other values or expressions in the field as needed.

Under Critical plane settings, enter a Search resolution Q. The default is 11. This parameter determines the number of evaluation points used in the search for the critical plane and it controls the computational time.

If Findley or Matake is selected as the Criterion, also select a method for the Shear range search method — Circumscribing circle or Maximum distance.