This example problem shows how to evaluate the C*-integral for cracks in structural components. C*-integral characterizes the crack tip conditions in homogenous materials undergoing a secondary (steady-state) creep deformation. Analyses of a simple semicircular surface flaw in a rectangular block and a warped flaw along a tubular joint are discussed. This example problem is solved using the Ansys Mechanical Application. To see this example solved using Ansys Mechanical APDL see C*-integral Evaluation for 3D Surface Flaws in the Technology Showcase: Example Problems.
The following features and capabilities are highlighted:
Evaluation of mode-I C*-Integral parameter for a semicircular surface flaw in a rectangular block using a Semi-Elliptical Crack object.
Evaluation of mixed-mode C*-Integral parameter for a warped semi-elliptical surface flaw in a tubular joint using a Pre-Meshed Crack object.
Analysis Settings for secondary Creep deformation dominating in crack tip domain.