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Why is my simulation showing bulging at holes of a pressure vessel while applying pressure from the inside?

Question asked by Mark Mark on May 24, 2018
Latest reply on May 24, 2018 by Felice Pasinetti

Objective

Simulate static fluid pressure inside container and measure stresses and deformations.

Activities performed

I have made a cuboid container with holes on one wall and run simulation with pressure of 500 psi applied on inner sides of the walls.

Results obtained

Bulging at the holes.

Question

Why is the bulging at holes where there is no material?

Outcomes