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I did a Calculation of 13-10 UNREINFORCED VESSELS HAVING AN OBROUND CROSS SECTION. The value of stress I obtained was high. I checked all the calculations and have doubts about two things: [ol 1] The value of Moment of Inertia, which is bt^3/12. Neutral axis to Extreme distance (c). I used this...

TSG4, Thank you for your response.

Hi TGS4, I wanted to know about the procedure of distinguishing between Primary and Secondary Stresses in Structural Components. ASME Section VIII Div 2 Part 5 has Stress Classification in Table 5.6 to distinguish between Primary and Secondary stress for Heads, Shells, and Nozzles. How can we...

IdanPV, Thank You for the Suggestion.

Hi IdanPV, There is no direct contact between Shells and Lugs. Both are bonded contact to the welds.

Hi IdanPV, I have made bonded contact of weld with both Shell and the Lug.

Hi Fraccionadora, ASME Section VIII Div 2 Part 5 has Stress Classification in Table 5.6 to distinguish between Primary and Secondary stress for Heads, Shells, and Nozzles. How can we distinguish Primary and Secondary stress for Structural components? Also, For Structural Components which...

Hi codyk, The Shell, Weld and lug are different body so the mesh nodes doesn't coincide.

Hi r6155, The Structure itself is not continuously attached to the shell. There is a gap for a half pipe jacket.

Hi Fraccionadora, Thank you for your response. From your reply what I understood is, If we classify the stress as Secondary stress then the failure mode will be switched to Ratcheting. And also the Local failure and buckling have to be checked. In my case, where I am doing failure from Plastic...

I did support lug FEA as per ASME Section VIII Div-2, Part 5, Elastic Stress Analysis Method (5.2.2). The model in analysis consists of Support Lug Assembly, Heads, Shell and fillet weld between Support Lug and Shell. The material properties of Shell and Support Lugs are as follows: Allowable...

By code Calculation, I mean ASME Section VIII, Div-1.

Issue: The stress on F&D head is extremely high in ANSYS Workbench as compared to ASME VIII Div-1 calculation. Vessel OD: 96”, 106” Seam-Seam Thickness: 0.4375” Pressure: 105 psi Material: SA-24 316L. The baseplate of Leg as fixed. I did ANSYS analysis for F&D (ASME 80:10) head. The obtained...