🔩 Cracked Plate: Paris-Law Fatigue Crack Growth, Critical Crack Length and Fracture Lab — 2D Crack Plate and Paris Curves

2D companion of the fatigue crack lab: the cracked plate with beach marks, crack length against cycles, the log-log Paris curve, stress intensity against the fracture limit and stress-life sweeps, using the same physics module as the 3D rig.