Simulating shear and bending on a welded tow hook bracket
I’m designing a welded tow hook bracket for a lightweight off-road trailer (max gross weight 850 kg), made from 8 mm thick mild steel plates (S355), joined with full-penetration fillet welds. I’m running a static FEA in SolidWorks to simulate pulling and angled side loads during recovery scenarios, but I’m getting unexpectedly low stress values around the weld areas, even with a reasonably refined mesh (avg. element size ~1.5 mm).
Could this be a meshing issue, or is it just an inherent limitation of the way fillet welds are represented in CAD-based FEA? I’m not sure whether I should model the welds explicitly or apply connector-based simplifications.