A special coding notation for WeldFEM has been implemented, which in some situations needs to be considered. Those kind of situations will be covered in this chapter.

In general there are 3 cases in which the coding notation must be followed: Thicken PLATE-Elements, Profiles With Different Thicknesses, Specify Joint Type

Thicken PLATE-Elements

In some situations, for example at screw connections where washers are in use, it is necessary to unite the thickness of two or more parts into one property, so that the washers stiffness is taken into account. In this case WeldFEM would detect a butt joint, since there are two different properties in use. An example is depicted below.

To prevent WeldFEM from detecting a butt joint at the junction of both properties a coding notation is needed. The coding notation only applys to the title of the property itself. It is advisable to rename the properties title which includes the thicknesses of the washers.

The coding notation is as follows:        $_"TITLE OF PROPERTY"

Example:        $_PL_8 - Sheet + Washers

Implementing this coding notation will make that WeldFEM ignores this property during weld detection. Hence caution is needed, since implementing the coding notation for properties may cause WeldFEM to ignore real welds.

Profiles With Different Thicknesses

There are profiles which do not have a consistent thickness, like the U-profile shown below. In order to choose a conservative calculation approach, the properties should have the thicknesses from the thinnest parts.

WeldFEM would now detect welds at the junctions of both properties. In this case the coding notation is a viable option also, since WeldFEM would ignore the relabelled property during weld detection. In this case the coding notation could have been applied to any of both properties.

The coding notation is as follows:        $_"TITLE OF PROPERTY"

Example:        $_PL_5 - U-Profile

Specify Joint Type

When modelling a WeldFEM compliant weld between PLATE- and SOLID-elements, a butt joint will be detected in every single case. In order to get around this and let WeldFEM assign the welds correctly a coding notation for this problem has been implemented.

Intended corner joint

Intended tee joint

The coding notation is as follows:        #C_"TITLE OF PROPERTY"        (To set a corner joint)

#T_"TITLE OF PROPERTY"        (To set a tee joint)

Example:        #C_PL_5 - Sheet (weld)

#T_PL_4 - Sheet (weld)

Exceptions For The Coding Notation

There are situations where the coding notation is not purposeful. An example of those kind of situations will be presented here.

In this example we have two U-profiles without a consistent thickness, so that modelling the u-profiles will require two different plate-properties. These two profiles are welded at their junction, as indicated in the picture below.

Now, there are two different scenarios, either to make use of the coding notation $_"TITLE OF PROPERTY" or not.

Scenario 1a:        Coding notation has been used for the property 1.
Scenario 1b:        Coding notation has been used for the property 2.

Scenario 2:        No coding notation has been used

The outcome of the weld detection is summarised in the table below.

Scenario 1a

Scenario 1b

Scenario 2

In order for WeldFEM to detect all welds, the coding notation must be disregarded. In the particular case of scenario 2, the user needs to delete the weld that has been detected in the single U-profiles between property 1 and property 2. By doing this the user is left with all the welds that need to be assessed.