Verification of Weld Joints
TITlE: Verification of Weld Joints on Plates-Ribs assembly.
SUMMARY: In this project, we are simulating the verification of Welds on Plates-Ribs assembly. Our main focus during the entire simulation is on how assigning different material properties for different part on assembly rapidly changes the Parameter's Values.
INTRODUCTION: There are generally the two plates with each different sizes, perpendicular to each & Two solid ribs are provided in between them meanwhile, both these parts are joined by a total of 24 welded joints. Simulating above model under a force of 15000N along Y Axis applied on small plate allow us how various parameters like Equivalent Stress, Elastic Strain & Directional Deformation appeares on model and changes with change in different material, which are to be applied on every welded joints.
Mesh Elemental size of 7mm for Plates
As mentioned above, to begin with, we have Meshed the Plates of assembly with an elemental size of 7mm each. Analysis begins with providing various boundary conditions which are necessary to simulate for above model. Here, we have fixed the big plate with fixeed joint applied at all four corners of plate in vertical positions, then the plate perpendicular to it at downward direction along Y axis is under 15000N of downward force. This Analysis focuses on how varying material properties for the the Plates, Ribs and Welded Joints affects the values of various parameters such as Equivalent stress, Elastic Strain and Directional Deformation. Following are three different cases with each aims to focus on different material properties to be applied on different part of given model.
- CASE 1:
It begins with the model provided with the whole model as a single material property. Which means only Stainless Steel is assign to entire model.
The both Plates (Big plate & small plate) Ribs and Welded joints ( all 24) are assigned as stainless steel as working material.
Directional Deformation:
The Model assigned with stainless steel undergoes a Max of 0.35844mm while a Min of -0.030376mm of Directional Deformation along Y Axis.
Equivalent Elastic Strain:
The Ribs of Model undergoes 0.00005096mm/mm of Elastic Strain.
Equivalent Elastic Stress:
Here, 341.33MPa of Max Stress is generated neear the rectangular hole of model.
Meanwhile,
AS observed above 301.37 MPa of stress is generated near the front welded joint of model.
The Force Convergence Graph for the above Analysis is ploted for a single point & can be seen below,
- CASE 2:
Now, here we have assigned the welded joint material as Aluminium alloy(high strength, wrought) however, the plate material is still the stainless steel.
Similar Analysis is executed by an application of 15000N of force along the Y Axis downwards at rectangular hole of small plate. The values for different parameters are taken as follows.
Directional Deformation:
Max Directional Deformation of 0.37249mm had been occured along Y axis of the small plate, with -0.02961mm of Min.
Equivalent Elastic Strain:
As Observed, 0.00049195mm/mm of Max Equivalent Elastic Strain had been generated at the Ribs of model.
Equivalent Elastic Stress:
A Max of 345.77MPa of Equivalent Stress had generated alonf the plate while, 0.213141MPa of Min stress.
Meanwhile, so far the welded joints are concerned the amount of stress generated inside them can be objectified as follows,
The Maximum amount of stress i.e. 250.88MPa of stress is generated at the front welded joints of model.
- CASE3:
In Orded to simulate this case, we must be using bronze as the weld material followed by Assigning Stainless Steel to both plates and Copper to the Ribs.
Welded joints For Ribs For Plates
Directional Deformation:
It can be seen as, 3.7754mm of Maximum Direction Deformation had occured for the samll plate followed by -0.07576mm of Minimum.
Equivalent Elastic Strain:
Along the Ribs a Max of 0.047334mm/mm of Equivalent Elastic Strain has occured & 2.601e-7MPa of Min Strain.
Equivalent Elastic Stress:
Maximum of 1206.6MPa of Stress is generated around plate & 0.00067613MPa of Min stress.
Meanwhile, so far the stress around the welded joints are concerned we have,
The Middle row existing at right side welded joint experienced a maximum of 45.296MPa of stress.
The Force Convergence graph for the above Analysis can be ploted for a single point as follow,
RESULT:
Bellow given Comparision chart shows how varying material affects the values of various parameters with each cases.
Apart from that,we can also plot a comparision chart for the weld joint that experiences the highest equivalent stress.
CONCLUSION:
Now, from the results obtained we can say that:
- The Maximum Deformation takes place in case 3 where, the Ribs are assign Copper & Welds as Bronze. Here due to Low Yield Strengt of Bronze & Copper they deform most than other material & more rapidly.
- The Maximum amount of Equivalent stress has been generated while simulating Brazing. It also appears due to high values of Yield Strength.
- The highest amount of Equivalent stress generated on Weld joints are those for which Stainless steel was assigned as a whole working material model.
- Also the second most amount of stress is developed by case 2, where the are where the force is acting undergoes maximum stress. All these appears due to High Yield Strent of Stainless Steel.