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FEA analysis

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Venvel Thermal & Mechanical Engineers gives committed services in FEA (Finite Element Analysis) analysis for complex geometries. This service facility includes Finite Element Analysis (FEA) of all pressure vessels, Heat exchangers, Condensers, Air cooled Heat exchangers, Non-standard & Customized design solutions and Structural construction.


Stages of FEA analysis :

1. Preparation of 2D model based on customer Input,
2. Converting 2D into 3D model
3. Validation of 3D model
4. Fine meshing of model using software to Millions of elements. (Trial & error mode)
– Final meshing will be decided, based on meshing which shows error percentage less 5%.
5. Analysis of Model
6. Interpretation of Report
7. Comparison & Preparation of report for third party approval using stress limits from the codes applicable for given geometry.



Venvel Thermal & Mechanical Designers use ASME Section VIII Div-1 for the design of vessels for U stamp applications.
and use ASME Sec VIII Div-2 for U2 Stamp designated vessels. Also, For both cases we use ASME sec VIII-2 stress limit equations for finding allowable stress on particular category.



FEA is not only generating software output based on Simulation, Its a interpretation of report makes value to the report. In this sense we do Interpretation and Preparation of FEA report equivalent to Third party approval and Authorized Inspectors approval. Our FEA reports have been accepted by many third party agencies in India & Abroad.



For the preparation of model we use different software and do analysis using ANSYS or SOLID WORKS based on client preference or geometrics complexity on meshing.(Outsourcing from Licensed users),



Here are some Stress limits we use from ASME sec – VIII-2 :

Pm = E1*E2*Sm general primary membrane stress intensity limit (material only)
Pm = 2*Sm general primary membrane stress intensity limit (bolting combine operation +seating)
Pl = 1.5*E1*E2*Sm local membrane stress intensity limit ( = Principle stress)
Pl+Pb = 1.5*E1*E2*Sm primary membrane + primary bending stress intensity limit (material only)
Pl+Pb = 3*Sm primary membrane + primary bending stress intensity limit (bolting combine operation + seating)
Pl+Pb+Q = Max(3*E1*E2*Sm,2*E1*E2*Sy) primary + secondary stress intensity (2*Sy only valid for Sya/Sta <=0.7)
Pl+Pb+Q+F = Use fatigue curves



Variable Descriptions: VIII-2

Sm (basic allowable)
Sy (yield strength)
St (tensile strength)
E (modulus of elasticity) – IID Table TM-1
E1 (weld efficiency)
v (Poison’s ratio) – IID Table PRD
E2 (casting efficiency)
Coef (coefficient of thermal expansion)