SHELL ANALYSIS. THIN-WALLED PRESSURE VESSEL

Purpose of the analysis:

The purpose of the analysis is to compare the displacement and stress distributions in an axisymmetric pressure vessel loaded by internal pressure (p=0,1Mpa) for different thickness of the reinforcing ring.

Description of the model:

Type of model: It is a two-dimensional problem of deformable body mechanics. Applied finite elements:

Largest Number

Nodes . . . . . . . . . . . 7700 Elements. . . . . . . . . . 7437 Element types . . . . . 1

Real constant sets. . . . . 2 Material property sets. . . 1

Material properties: Pressure - p=0.1Mpa E = 2* 10^5 Mpa √=0.3

Shape of the model:

Number Defined

Number Selected

7673

7413 n.a.

1

2

n.a. n.a.

7700 7437

1

Discretization



What load cases were analyzed:

Type of analysis: axisymmetric

Boundary conditions:

Displacements = 0 at reinforcing ring. Internal pressure = 0.1 Mpa Simmetry at planes XZ and YZ



Results of analyzes for individual cases:

Stresses along lateral walls:

Stresses along the path at the lower part of the vessel:



Numerical values:

Von Mises equivalent stress from top, middle and bottom layer at the junction with the reinforcement ring. Values for different ring thicknesses:

SEQV 0.2 1

2 3 5 10

Top Middle Bottom

746.57 346.802

513.09 213.373 540.297 230.665

230.466 185.998 148.733 125.127 123.592 122.443 148.973 142.316 137.012

120.502 121.355 132.958

Graphs on the basis of the paths:

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0"

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