Add one or more Spot Welds nodes to model sets of spot welds. A single
Spot Welds node can accommodate any number of spot welds, as long as they share the same properties. The spot weld locations are entered as a list of coordinate triplets, and are independent of geometrical points or mesh nodes.
Select Connected location —
Automatic or
Manual. In the automatic mode, the two sides of the shells that are found to be closest to each other are connected. If you want to make another choice, or the if the automatic search for some reason does not give the intended result, select
Manual.
When data is taken From material, the elastic material properties (
E,
ν) on the destination side are used.
Enter the Cohesive thickness,
Lcohe. This is a distance in the direction perpendicular to the plate used to compute the stiffness of the connection. Its value should be of the order of the spacing between the welded plates. The default value is one percent of the nugget diameter,
dnug/100.
For User defined nugget stiffness, enter values or expressions for the
Normal stiffness,
kn, and
Shear stiffness,
ks. These are the total stiffnesses of a single spot weld (SI unit N/m).
When Use automatic quadrature settings is selected, the integration order is set to 8, which means that there are 5-by-5 integration points in a quadrilateral element.
Clear Use automatic quadrature settings to manually enter an integration order. The maximum value is 30, which means 16-by-16 points in a quadrilateral element.
Select the Search method —
Closest point or
Manual to specify what should happen if an evaluation point in the destination boundary is mapped outside the source boundary.
The Closest point method is the default and most robust search method. The closest point in the source selection is used by the mapping operator, even if that point is far away from the destination point. This method is not as efficient as the
Manual method.
The Manual method is an alternative search method that is computationally efficient, but its robustness is determined by the curvature of the boundaries, the
Search distance, and the
Extrapolation tolerance. Specify the maximum search distance between the source and destination boundaries and the extrapolation tolerance.