Verification of Weld Joints

• Objectives: To perform Strength Analysis on Weld Joint with different materials.

• Geometrical Design:

We have 3D Geometry of Plates and Ribs joined with Welds, here is the geometry view.

• Material Properties:

Total 4 different kinds of materials are used for this analysis, named as Stainless Steel, Aluminum Alloy, Cast Bronze and Copper Alloy, these 4 materials having different properties, have a look at those properties.

• Problem Statement:

Two plates and two ribs joined with welding joints. Four Holes of vertical plate kept fixed and downward force applied to a square hole in horizontal plate. We will look for Directional Deformation, Stress and Strain in this project.

• Mesh Criterion:

Type of Element: Automatic Method (Mixed Elements, Tet & Hex)

Size of Element: DEFAULT

Mesh Refinement: 7 mm (Body Sizing, Two Plates)

This is how assembly looks like after Meshing;

• Boundary Conditions:

Total 5 Frictional Contacts applied at various contact surfaces, Weld Bead kept as bonded. Co-Efficient of Friction taken as 0.20 for frictional contacts. We will consider various outputs based on analysis results such as Directional Deformation, Equivalent Elastic Strain, Equivalent Stress & Safety Factor.

This is how the model looks like when contacts applied to it;

1) Frictional:

2) Bonded:

• Loading and Analysis Settings:

Total four holes which are kept as fixed in Vertical plate & There is a square hole at Horizontal Plate which is applied force of 15000 N in downward direction, for analysis point of view Large Deflection is kept ON.

• Post Processing:

After analyzing the project we will look after some results as written above, we are having 3 different cases for this solution, as material changes in each cases.

Case: 1

Material for Plates: Stainless Steel

Material for Ribs: Stainless Steel

Material for Weld Beads: Stainless Steel

Directional Deformation

Equivalent Elastic Strain (Ribs)

Equivalent Stress

Equivalent Stress (Weld Joints)

Safety Factor

Case: 2

Material for Plates: Stainless Steel

Material for Ribs: Stainless Steel

Material for Weld Beads: Aluminum Alloy

Directional Deformation

Equivalent Stress

Equivalent Elastic Strain (Ribs)

Equivalent Stress (Weld Joints)

Safety Factor

Case: 3 (Brazing)

Material for Plates: Stainless Steel

Material for Ribs: Copper Alloy

Material for Weld Beads: Cast Bronze

Directional Deformation

Equivalent Stress

Equivalent Elastic Strain (Ribs)

Equivalent Stress (Weld Joints)

Safety Factor

Post Process Results Summary;

• Results & Conclusion:

1) Total Deformation is higher in Case 3 with value of 0.4088.

2) Equivalent Stress is higher in Case 3.