Hello ezy,
Smart crack growth tool in workbench supports 3D analysis only, to know more about it’s assumptions and limitations, go through this link below.
SMART Crack-Growth Assumptions and Limitations (ansys.com)
For modelling this in 2D, check this Ansys help document on Fracture mechanics:
Chapter 1: Understanding Fracture Mechanics (ansys.com)
1.2. Understanding How Fracture-Mechanics Problems Are Solved (ansys.com)
Regards,
Nanda.
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