Fatigue Crack Growth in Welded S355 Samples Subjected to Bending Loading

Abstract

The paper presents a result of experimental tests of welded S355 samples subjected to bending loading. In order to analyze how the fillet joints’ shape and the load ratio affect the crack growth, we selected two kinds of the fillet shape: concave and convex, and load ratios, namely R = −1. Samples with stress concentrators in form of the two-sided fillet welded joint were tested. The test results were compared to experiments conducted on welds samples with and without heat treatment.

Keywords

• fatigue crack growth welding
• fillet welds
• bending
• micro hardness
• residual stress
• microstructure