STRUCTURAL ANALYSIS OF WELD JOINTS USING ANSYS WORK BENCH

AIM:

To perform structural analysis of weld joints for three different case setups and compare the directional deformation, equivalent stress and equivalent strain for all the cases

STRUCTURAL ANALYSIS:

• Structural analysis is the process of calculating and determining the effects of loads and internal forces on a structure or an object.

NEED FOR STRUCTURAL ANALYSIS:

• Structural Analysis is particularly important to understand the load paths and the impacts the loads have on engineering design.
• It allows engineers to ensure a piece of equipment or structure is safe for use under the estimated loads it is expected to withstand.

CASE SETUP:1

• Stainless Steel: In this case, the material of the plates must also be the same. Use Stainless steel for both weldments and plates. No need to add flux to the weldments.

PROCEDURE FOR IMPORTING THE MODEL:

• Assign the material type to the model to be imported using the tool Engineering data-Edit-Engineering data sources

MATERIAL PROPERTIES:STAINLESS STEEL

MATERIAL PROPERTIES: COPPER, CAST

MATERIAL PROPERTIES:BRONZE, CAST

MATERIAL PROPERTIES:ALUMINIUM,H.S,W.R

• Import the MODEL file using the tool Geometry-import.

PROCEDURE FOR STRUCTURAL ANALYSIS:

• Update the model to work on the model for structural analysis

• Under Model-geometry assign the name for plate setup based on their application.
• Under connection create a contact between the welds and plates, parallely create another contact between the big plate, small plate and ribs.

• Mesh the big and small plates with a mesh element size of 7mm

• Under analysis setting create a fixed support at the holes in big plate

• Then create a force to run the simulation for a load of 15000N that is to be applied at the rectangular hole in the small plate.

• Insert the total deformation in Y direction, von mises stress solution and elastic strain to analyse the solution. Then press f5 to solve.

RESULTS:

TOTAL DEFORMATION

EQUIVALENT STRAIN

EQUIVALENT STRESS

EQUIVALENT STRESS IN WELD

CASE SETUP:2

• Aluminium Alloy:The material to be chosen for this case is Aluminium alloy(high strength, wrought). Plate material to be used is stainless steel

RESULTS:

TOTAL DEFORMATION

EQUIVALENT STRAIN

EQUIVALENT STRESS

EQUIVALENT STRESS IN WELD

CASE SETUP:3

• Bronze: In order to simulate \"Brazing\", you should be using bronze as the weld material. Assign Stainless Steel to both plates and Copper to the \"Ribs\".

RESULTS:

TOTAL DEFORMATION

EQUIVALENT STRAIN

EQUIVALENT STRESS

EQUIVALENT STRESS IN WELD

COMPARISON OF RESULTS:

• Stress is independent of young\'s modulus. The yield strength is different in all three materials. Yield strength is the stress at which the material begin to deform. The yield strength of weld material stainless steel is higher than other two weld materials. So stainless steel has the higher equivalent stress. From the result stainless steel weld material has the highest equivalent stress i.e., 293.94Mpa
• Young\'s modulus is equal to the ratio of stress and strain. Since strain is inversely proportional to young\'s modulus and the case setup:2 material has the lower young\'s modulus than other two case setup material, so it must have higher strain and from the result it has the higher total equivalent strain value i.e.,0.0031794

CONCLUSION:

Thus the structural analysis for weld joints for three different case setups has been performed and the results were compared.