EFFECT OF V NOTCH SHAPE ON FATIGUE LIFE IN STEEL BEAM MADE OF MILD STEEL AISI 1020

The present work encompasses Effect of notches with various notch geometries and dimensions on fatigue life in steel beam made of Mild Steel AISI 1020 which has a wide application in industry. Fatigue life of notched specimens is calculated using the fatigue life obtained from the experiments for smooth specimens and by use Numerical method (FEA).The fatigue experiments were carried out at room temperature, applying a fully reversed cyclic load with thefrequency of 50Hz and mean stress equal to zero (R= -1), on a cantilever rotating-bending fatigue testing machine.The stress ratio was kept constant throughout the experiment. Different instruments have been used in this investigation like Chemical composition analyzer type (Spectromax), Tensile universal testing Machine type (WDW-100E), Hardness Tester type (HSV- 1000), Fatigue testing machine model Gunt WP 140, Optical Light Microscope (OLM) and Scanning Electron Microscope (SEM) were employed to examine the fracture features. The results show that there isacceptable error between experimental and numerical works.