Learning Forum

[Siddharth Manda]

I have modelled a simple flat plate ( 500mm x 20mm thick) welded on 3 sides ( 1m + 1m+ 0.5m) on a base plate (30mm plate), which is fixed at the 4 edges. I have applied a load of 5.0E5 N (1000N/mm x 500mm). 


In order to tap the weld stress or the reaction force, i followed 3 types

1) Finding Shear Stress in XZ Plane 


The Shear Stress seems to be nullified and effective shear stress is 0 MPa. Any reason for this behaviour ? I wanted to take this stress and design my weld for lateral shear stress.  How is the Shear Stress Calculated ? I tried capturing nodal force and dividing the shear area to get stress, but value seems to be different than the stress shown below

2) Finding Normal Stress in Z Direction

How is Normal Stress Calculated at the junction of weld interface. I understand that the front yellow zone is just the load / area which comes to 50MPa. But as the welding starts, how are the stresses generally computed ?

3a) ENFO Vector Command to get the Force 

Trying to directly get the Forces from ENFO Command. I got the below detail. For some reason, 50000N is acting in the reverse direction at two corner nodes and my effective force comes down to 4.5E5 (5.0E5 - 5.0E4). What is the reason for this ?

3b) ENMO Vector Command to get the moment - I wanted to know abt the direction of Local Moment what this refers abt ? My Moment means abt XZ Plane ? Although the entire moment is actually close to zero. 

[Ashish Kumar]

Hi,

Please see if the following link helps: How to Size a Fillet Weld Using Finite Element Analysis (FEA) | Apollo Engineering (apolloedge.com)

Regards,

Ashish Khemka

[Siddharth Manda]

 

Yes the link was helpful, but in my case, for the calculation of ENFOZ, the reaction is not coming as the load application, 50000N has been deducted and acting as a reaction at the two points as shown in snap below.