Design of a weld without using unit thickness

[Mohanlal0488]

Greetings Structural Gods

In all structural books I have looked at (mechanical and structural) it seems that the welds are always taken as a unit thickness (1mm), and this is used to develop the required mechanical properties.

I have been messing around with a program I developed, taking the element as a rectangular bar and calculating the associated stresses due to loading. There after I also do the same with the weld, however a unit thickness is not chosen, the actual weld thickness is used.

I have presented the results below... I would like to know some thoughts on the stresses presented? The stresses from the element to the weld do not flow numerically this is however due to the stresses on the weld and element been calculated separately

 

[DrZoidberWoop]

Provide the loading pattern, load magnitude, and units if you want a meaningful response or verification.

 

[JStephen]

I'm not sure what I'm looking at on the pictures there.
A method for weld analysis needs to be quick and fairly simple if used for one-off welds, otherwise the analysis effort is disproportionate to the cost.
You have some variation in the shape of an actual weld versus the theoretical weld, and then have high residual stresses from the welding process itself, so a high degree of accuracy in the solution method isn't necessarily that useful.

 

[Agent666]

The resultant critical stress on a weld is based on the throat thickness. Analysing a plane shape with some relationship to the weld size and analysing the stresses isn't necessarily giving you the same thing. The method of analysis seems a little flawed based on your explanation.

If you have different weld sizes, then instead of using the unit thickness of 1, I believe you can use an appropriate ratio of the thicknesses to find the weld group properties and then continue as normal and ratio the resulting stresses appropriately.

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