Design and Development of Fatigue Testing Machine for Leaf Spring

Fatigue is the failure of a material or machine component caused by repeated or fluctuating stress typically beginning with a tiny undetectable crack at a point of discontinuity like a notch hole or machining mark. As the crack grows stress concentration increases accelerating the failure. Springs including leaf springs absorb shocks and vibrations through elastic deformation. In this study fatigue testing of a leaf spring was conducted using a slider-crank mechanism based on impactor theory with deflection readings measured using a strain gauge and load cell.