Simulate Welding in SOLIDWORKS with Weld Edge Simulation

Article by Malak Souissi, CSWP updated April 20, 2023


SOLIDWORKS simulation encompasses two types of edge welds: Fillet Weld and Groove Weld, which may be single-sided or double-sided to simulate welding. Fillet weld is a triangular welding technique utilized to connect two metal parts at a right angle. In contrast, groove weld is implemented in a pre-made opening or groove. The outcomes of Edge Welds are computed for all mesh nodes situated on the intersection of the terminated part’s edge. These outcomes are established with reference to a local coordinate system introduced at each node, as depicted in the figure.

The image below displays the representation of weld size. In the case of a fillet weld, the weld size is the measurement between the root and its toe, while the weld throat is the minimum distance between the root of the weld and the weld face. Concerning groove weld, the weld size is the width of the weld coverage, and the weld throat is the depth of the groove filled with weld.

Fillet Weld and Groove Weld

Weld Size demonstrated in SOLIDWORKS Help


The edge weld connector determines the necessary size of the weld required to connect two metal components. The software computes the appropriate weld size at each mesh node position across the welding seam. You may choose either American or European Welding Standards to conduct the welding calculations.

Note: The Edge Weld Connector is available in SOLIDWORKS Simulation Professional and SOLIDWORKS Simulation Premium.

Example of Estimating Weld Size

Let’s examine a cantilever beam with four edge welds at its fixed end. It’s worth noting that surface bodies were used to model the beam to enable the inclusion of edge welds. To function properly, at least one of the two sides of the edge weld must be a surface body.

A Cantilever Model with 4 Fillet Edge Welds on the Fixed End

A Cantilever Model with 4 Fillet Edge Welds on the Fixed End

After completion of your welding simulation, to determine the size of the welds, you can right-click on the Results folder and choose “Define Weld Check Plot.”

define weld check plot

To Check on the Weld Size Estimation, Right-click on Results folder and Select “Define Weld Check Plot…”

Edge Weld that needs attention in the model

Edge Weld that needs attention in the model

You also have access to further details regarding the individual edge welds, by clicking the “Details” button on the small window.

Details of the Edge Welds

Details of the Edge Welds

We can also plot Weld Size (mm) vs. Position along weld seam distance to give even further insight into how the weld will be acting in real life, see the graph below.

Edge Weld Size Plot vs Weld Throat Sizes

Edge Weld Size Plot vs Weld Throat Sizes

SOLIDWORKS Simulation Professional is a powerful tool you can leverage to simulate welding and iterate your design for the best outcome possible. Contact TriMech for more information about the tool.

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Malak Souissi

Malak Souissi (CSWP) is a MSc. Mechanical Engineering specializing in Mechanical Design & FEA. He has over 3 years of experience in the Mechanical Design & Process engineering of industrial equipment. He also has a background in Marine Systems Engineering with on-board ship experience.