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2022-05-12

Line Welded Joints

Line welded joints are required for a stress analysis of welds. If you define a weld for a line in a surface model, the stresses of this weld are generated using the design add-on Stress-Strain Analysis. Thus, you directly obtain the stresses for the weld design for the selected weld type.

Info

Line welded joints affect neither the stiffness nor the determination of internal forces.

Main

In the Main tab, you define the weld type and set its parameters.

Categories

In this dialog section, specify which weld is present. The types, including parameters, are displayed in the dialog graphic.

Joint type

The following joint types are available for selection in the list:

  • Butt Joint
  • Corner Joint
  • Lap Joint
  • Tee Joint

Weld Type

Depending on the joint type, the list offers different options to perform weld design checks.

Weld Arrangement

The list provides two options for arranging the weld axis system:

  • Reverse Surface Normal (-z)
  • Surface Normal (+z)

This allows you to control whether the weld is arranged on the bottom (+z) or on the top (−z) of the connected surface. For symmetrical weld types such as a T-joint with double fillet weld, the arrangement is irrelevant.

Longitudinal arrangement

Line welded joints can be arranged to be "Continuous" or "Intermittent" along the line length. In the latter case, the longitudinal dimensions of the weld segments and the interruptions and, if applicable, the distance of the first weld segment from the start of the line must be specified.

Info

For intermittent welds, the discontinuous longitudinal arrangement is taken into account via a "smeared approach". Local stress increases at the edges of the weld segments, for example, cannot be taken into account with this method.

Parameters

In this dialog section, enter the "Weld size" to define the weld thickness. The "Weld length" is taken from the line length.

Assigned to Line No. and Surfaces No.

Define the line and the surface on which you want to arrange the weld. You can use the Select Individually button to define the objects graphically.

Info

The surface that you select as the first surface during assignment represents the connected surface. It is displayed in dark red in the dialog graphic to the right. For example, the entry "6/2,1" means that the weld is defined on line No. 6, and surfaces No. 2 and No. 1 are connected there. Surface No. 2 is the connected surface.

Only surfaces with one of the following material types can have line welds assigned to them:

  • Base
  • Steel
  • Metal
  • Aluminum

Tip

In the technical article Line Welded Joints in RFEM 6, you can find detailed information about defining welds between surfaces.

Parent Chapter