The Line Welded Joint Configuration dialog box manages the basic specifications for the stress-strain analysis of line welded joints. The concept of the Configurations dialog box is described in Chapter Stress-Strain Analysis . It also explains how you can assign the objects.
Stress
In the Stresses tab, you can select the weld stresses to be calculated.
The letter in the index of the stress component stands for the action direction of the stress. The following conventions apply:
- w corresponds to the weld axis and is always identical to the x-axis of the line on which the line weld is defined.
- s is oriented parallel to the z-axis of the first surface from the line weld definition (simplified method) or is parallel to the effective weld area (directional method).
- j is orthogonal to the ws-plane.
The sign in the index of the stress component refers to the design location in the weld, in relation to the z-axis of the first surface from the line weld definition. A + indicates the design location in the s-direction of the weld, which has the greatest z-coordinate in the local coordinate system of the first surface. Accordingly, a - describes the design location with the smallest z-coordinate.
In the case of intermittent weld seams, the discontinuous longitudinal arrangement is considered by means of a "blurred approach". According to EN 1993-1-8 [1], Clause 4.9, the weld stresses are multiplied by the ratio of the effective weld length to the total line length. This calculation approach can be used, for example, to estimate the longitudinal shear stresses of continuous longitudinal welds. However, the local stress increase due to the discontinuity or the concentrated load introduction cannot be determined adequately.
The 'Factor' column is of no importance for line welded joints.
If you want to use a user-defined stress as a reference, select the limit stress type 'User' from the list. Thus, the field in the 'Limit Stress' column becomes accessible.
Stress Ranges
In the Stress Ranges tab, you can select the stress types for which the ranges are to be calculated and whether limit stresses are relevant in this case.
The limit stress type 'Without' is preset. If you want to specify a limit stress, select the stress type 'User' in the list, then enter the corresponding value.
Special Options
In the Special Options tab, you can make settings for the smoothing of result diagrams for line weld seams.
With the smoothing options 'Linear' and 'Constant', it is possible to distribute local stress peaks over the weld length. In the case of linear smoothing, the stress distribution between both end values is displayed in a linearized way, in the case of constant smoothing, the results are the same throughout.
The 'Stress analysis method' for fillet welds can be performed according to EN 1993-1-8 [1] by the simplified approach in Section 4.5.3.3 or direction-related according to Section 4.5.3.2. Depending on the method, different stress types result.
If you want to consider the 'Weld eccentricity' in the stress analysis, select the corresponding check box. This way, additional moments are considered that can occur, for example, in the case of one-sided fillet weld structures.