Study and Analysis Done for Shot Peening Performed by Design Expert Software

Shot peening is a cold working complex process widely used to improve the fatigue life of metal components in the automobile and aerospace industry and to produce thin components with complex shapes such as wing skins. This process is completed by bombarding the metallic component surface with shots at a high velocity that induce a layer of plastic deformation near the surface. In this plastic deformation region a residual compressive stress field developed, along with increased tensile stress through the thickness. Developed compressive residual stress reduces the premature failure under cyclic loading conditions causes improves the fatigue life of the peened component. Many shot peening parameters, such as shot size, shot type, shot velocity, pressure, mass flow, incidence angle, material properties of the target component, etc. have great effect on shot peening results. And output parameter (tensile strength, surface roughness, compressive residual stress etc.) are obtain with the help of Design Expert software.