Week 3 Verification of Weld Joints

Verification of weld joints

Objective:

To carry out a static structural analysis to find out Equivalent stress, Equivalent strain and Directional deformation on Weldment bracket (which has 2 plates and 2 ribs) with 3 different weld materials. Refer below for weld material.

Case 1 – Stainless steel for both weld materials, plates & ribs

Case 2 – Aluminum alloy for weld materials, Stainless steel for plates & ribs

Case 1 – Bronze for weld materials, Stainless steel for plates & Copper for ribs

CASE 1:

Here Stainless steel for both weld materials, plates & ribs has been taken for static structural analysis and refer below for more details.

1. Contact of Plates & ribs

Both plates and ribs are connected to each other by frictional contact and weld beads are connected by bonded contact with plates and ribs.

Connection between Big plate and small plate

Connection between Big plate and Rib1

Connection between Big plate and Rib2

Connection between Small plate and Rib1

Connection between Small plate and Rib2

2. Mesh.

Refer below for Mesh details. 7mm mesh size is selected for both big & small plates. Default mesh size is kept for ribs & weld beads.

3. Fixed support & Load acting on part.

Weldment bracket is fixed by 5 holes. Highlighted in lavender color in above picture.

15000N force has been applied on rectangle slot in small plate. Highlighted in red color in above picture.

4. Results

4.1 Von-mises stress

4.2 Equivalent strain

4.3 Directional deformation

CASE 2:

Here Aluminum alloy for weld materials, Stainless steel for plates & ribs has been taken for static structural analysis and refer below for more details.

1. Contact of Plates & ribs

No change, contacts for plates, ribs and weld beads are same as case 1.

2. Mesh.

No change, mesh details are also same as case 1.

3. Fixed support & Load acting on part.

No change, fixed support and load are applied as same as case 1.

4. Results

4.1 Von-mises stress

4.2 Equivalent strain

4.3 Directional deformation

CASE 3:

Here Bronze for weld materials, Stainless steel for plates & Copper for ribs has been taken for static structural analysis and refer below for more details.

1. Contact of Plates & ribs

No change, contacts for plates, ribs and weld beads are same as case 1.

2. Mesh.

No change, mesh details are also same as case 1.

3. Fixed support & Load acting on part.

No change, fixed support and load are applied as same as case 1.

4. Results

4.1 Von-mises stress

4.2 Equivalent strain

4.3 Directional deformation

Conclusion

S.No	Material	Max. Stress MPa	Directional deformation MM	Equivalent elastic strain
Case 1	Stainless steel for both weld materials, plates & ribs	337.67	0.351	0.0018
Case 2	Aluminum alloy for weld materials, Stainless steel for plates & ribs	362.83	0.834	0.0036
Case 3	Bronze for weld materials, Stainless steel for plates & Copper for ribs	351.93	0.404	0.0032

When comparing the weldment bracket with 3 different materials(3 cases), Case 1 has 337.67 MPa stress, 0.351 mm Directional deformation & 0.0018 Elastic strain which are less values.