In this work, we model the rupture of a pressurized cylinder. The simulations are carried out using the RKPM meshfree method in an explicit total Lagrangian framework with fullly coupled thermo-mechanical behavior. The Johnson-Cook constitutive model is used. We developed the visibility and crack morphology algorithms for this problem. The algorithms, in principle, can be generalized for any directed surface.
The first movie shows a thin cylinder rupture.
The sequence on the right shows the hoop stress and clearly shows unloading as the crack propagates. The sequence on the left shows the damage measure used to determine material failure.
Tall thin cylinder
And this is the same movie, but closer up on the crack (damage and hoop stress have switched sides!). It is a BIG file, so download it!
Tall thin cylinder(close-up)
The next two stills are close-ups of the crack tip clearly showing the nodes
Crack tip
Crack tip following damage
These two stills are just before the first crack opens.
Effective Plastic Strain at Onset of cracking
Effective Stress Strain at Onset of cracking
The following images are for cracks in a laminate beam in bending. The layup is (0/90)ns.
Coloring by layers
Dilitational utilization
Distoational utilization
Normal Strain x-x
Shear Strain x-z
