Stress concentration in notches and grooves

Discover Stress Concentration — the silent killer that turns safe-looking designs into sudden failure points. We break down why holes, fillets, notches, keyways, and geometric discontinuities multiply local stresses by 2x, 3x, or more, even when average stress is well below yield. Learn how to calculate and apply stress concentration factors (Kt), the dangerous relationship with fatigue, real-world examples from shafts, pressure vessels, and brackets, and proven mitigation strategies like generous fillets, shot peening, and proper analysis that keep parts alive in mechanical engineering.Keywords: stress concentration, stress concentration factor Kt, stress risers mechanical engineering, notch effect, hole stress concentration, fillet radius stress, fatigue stress concentration, geometric discontinuities, stress concentration fatigue failure, shaft keyway stress, pressure vessel nozzle stress, reducing stress concentration, mechanical engineering stress analysis, Kt charts, design against stress risers, fracture at stress concentrations