Reply To: Delamination not occurring in an End Notched Flexural Modal

[Ashish Khemka]

Hello,

For the messages you encountered:

1. Fracture Parameters Incorrect:

   • This warning often indicates issues with the calculation of fracture mechanics parameters. Ensure that the crack tip nodes are not attached to unsupported element types. You might need to remove contact elements at the crack front if they are present.

2. Contact Status Abrupt Change:

   • This warning suggests that the contact status is rapidly changing between “closed” and “far open” without passing through "near open". You can try reducing the time step size or increasing the pinball radius to stabilize the contact status².

3. Reference Convergence Value Less Than Threshold:

   • This warning indicates that the reference convergence value is very small, which can happen when applied loads are minimal. You can override the minimum reference value by specifying it under the nonlinear controls of the analysis settings.

4. Small Equation Solver Pivot Term:

   • This warning usually points to a numerically unstable model, often due to large deformations or insufficient constraints. Ensure that your model is properly constrained and consider refining your mesh or adjusting the solution method.

Regards,

Ashish Khemka