I need help with the ANSYS software package to learn stress analysis
Thread Content
I have here a bottom plate that is welded to the cylinder; the thickness of the bottom plate must ensure that the allowable external force is not less than 0.21 Mpa. I don’t know how to use ANSYS for analysis
Use SW6 – Part Design – Head – Flat Cover to calculate the strength.
Using SW6, the thickness of the flat cover comes out to be too large, which does not correspond to reality!
That shouldn’t be the case. Did you choose the right type of flat lid? All kinds of flat lids are available.
Why don’t you go to the equipment area for computing devices? No one in the process area will pay attention to you
ANSYS can be used for analysis; the key is to define the boundary conditions accurately, otherwise the results will not be accurate
This post was last edited by lupg on 2019-9-8 at 17:22. 1. The friend on the sixth floor is right; the key to ANSYS analysis lies in accurately defining the boundary conditions. 2. The original poster posed a principle-based question, requiring a result of 0.21 Mpa without specifying any other conditions, so a hypothetical model is used here for discussion. 3. Hypothetical model: a closed pressure-bearing cylinder, with a bottom plate equivalent to a flat cover head; the cylinder’s diameter, thickness, the bottom plate’s thickness, and the applied pressure are specified, and a symmetric structure rotated by 30° is adopted. 4. A stress analysis was conducted to obtain the stress distribution map, which is attached. 5. As can be seen from the graph, high stresses are concentrated at the junction between the cylinder and the bottom plate, and these stresses do not extend throughout the entire thickness of the cylinder; in other words, the outer side of the cylinder’s wall does not reach the yield strength. As the bottom plate thickens, the thickness of the high-stress region in the lower part of the cylinder gradually decreases, and tends to fall entirely within the required stress range of the material, converging with the calculation results of SW6. The bottom plate is at a very low stress level everywhere except for the annular area in contact with the cylinder. 6. By using stress analysis, if the boundary conditions are appropriate and the results are reliable, the focus shifts to determining how to keep the stresses within a safe range. 7. The above are just the humble opinions of a beginner