Chapter 44: C*-integral Evaluation for 3D Surface Flaws

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) creeping deformation.

Analyses of a simple semicircular surface flaw in a rectangular block and a warped flaw along a tubular joint are discussed.

The following features and capabilities are highlighted:

  • Evaluating the C* integral for a semicircular surface flaw in a rectangular block.

  • Evaluating the C* integral for a warped semi-elliptical surface flaw in a tubular joint.

  • Meshing around a crack front in 3D structures.

  • Analysis controls for secondary creep deformation dominating the crack tip domain.

For more information, see C*-integral Calculation in the Fracture Analysis Guide.

You can also perform this example analysis entirely in the Ansys Mechanical Application. For more information, see C*-integral Evaluation for 3-D Surface Flaws in the Mechanical Technology Showcase: Example Problems.