Fillet weld geometry
Fillet weld geometry describes the shape and size of a triangular weld between two parts. The leg length and the weld reinforcement affect the load capacity of the joint.
Physical-Chemical Mechanism of Action
A fillet weld has a triangular cross-section, with the legs connecting the parts and the tip serving to absorb stress. The geometry influences the distribution of stresses and the behavior of the structure under load.
Metallurgical Relevance & Risks in Welding
Incorrect fillet weld geometry can lead to stress concentrations that may cause cracks. Legs that are too short or an excessive weld reinforcement increase the risk of hot cracks and fracture under load.
Workshop Practice & Instructions
The leg length should be at least 3 to 4 times the thickness of the parts to ensure even stress distribution. The weld reinforcement should be about 1.5 to 2 times the thickness of the weld. For special applications or materials, this may vary, so precise measurement and a monitored procedure are always required.