Week 3 Verification of Weld Joints

Objective:

Simulate three different types of welding using three different weld materials

Weld Material used:

Case 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.

Case 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]

Case 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".

Run the simulation for a load of 15000N that is to be applied at the rectangular hole in the small plate( Same as in the video).

For each case, find out the Directional Deformation and equivalent strain experienced by the setup. Identify the weld joint that experiences the highest equivalent stress in each case and compare the results for all three cases

SOLUTION:

CASE SETUP:

Adding materials: Add materials of stainless steel,alluminium alloy,bronze,copper

The geometry contains 2ribs,2plates and 26 fillet welds

contacts:

create contacts based on definition and give plates and ribs are frictional contacts and give frictional coefficient is 0.2

Meshing:

mesh the geometry as a sizing of plates 7mm and ribs 10mm. then generate the mesh.

• Go to analysis settings select Large deflection is on
• give fixed supports by selecting faces at 5 holes

• Now we have to apply force in y direction at the hole of 15000 Nby go to static structural<rightclick<insert<force

• go to solution<insert

Equivalent Stress:

Equivalent stress in weld joints :

Equivalent elasticstrain:

CASE2:

In this case change the material of weld joints is alluminium alloy and for plates use stainless steel

Results for case2:

Directional deformation:

Elastic strain:

Stress:

stress in weld joints:

Elastic strain for Ribs:

Case-3:

Equivalent stress:

Directional Deformation:

Elastic strain of ribs:

Equivalent stress of weld joints

elastic strain:

Result comparison:

weld joints:

	stainless steel	alluminium alloy	bronze
Eqivalent stress(Mpa)	302.81	251.96	262.76

	stainless steel	alluminium	Bronze
Directional deformation	0.35107	0.36511	0.39468
equivalent elastic strain	0.0018741	0.003417	0.0032889
equivalent stress	341.18	345.82	350.43

Discussion:

maximum stress generated in weld joints made by stainless steel then followed by bronze and alluminium.alluminium joint is weak compared to stainless steel and bronze.