Why does a conical head always indicate the need for reinforcement?
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Why does the conical head always indicate a need for reinforcement, even when a value of 0.01 MPa is entered in the calculations? The required reinforcement length is also calculated, yet the result still shows that it meets the requirements; I really can’t understand the results from this SW6 program.
There is no corner radius at the short end; are you using the formula for edges folded at both ends?
The individual said: It is related to the half-top angle of the head. The semi-apex angle is directly related to the bending stresses and stress superpositions that occur on the surface of the head. Under internal pressure, the axial forces acting within a certain radius range cause bending stresses associated with the semi-apex angle; this leads to the head assuming a spherical shape under operational conditions, independent of the material thickness
Take a look at the curve for 150; it’s the opposite of what you think. In 150, the lower the pressure, the more reinforcement is needed; it is also related to the half apex angle.
Aren’t formulas generated automatically by software? I selected small end without folding.
150, p124, Figures 5-11, 5-13