Numerical simulation of shot peening based on surface coverage and shot peening intensity
Coverage and shot peening intensity are essential parameters for standardizing the shot peening process,which cannot be set directly by the shot peening equipment in production or directly input as parameters in the shot peening numerical simulation model.To realize the calculation and control of coverage and shot peening intensity in numerical simulations,a numerical simulation system containing a multi-shot model and an Almen strip model was established.An algorithm,developed based on the Avrami equation and a Python program,was employed to generate random initial positions of multiple shots with specific coverage.Furthermore,the multiple shots model was rapidly established on Abaqus.Employing the DEM-FEM coupling method,a simplified Almen strip model considering shot peening intensity was constructed based on particle generator.Shot peening experiments were conducted to validate the effectiveness of the developed shot peening numerical simulation system by comparing shot peening intensity,residual stresses and surface roughness.The results show that at the same coverage level,higher shot peening intensity leads to deeper residual stress field in the target and increased surface roughness.Additionally,when coverage and shot peening intensity are the same,smaller-sized and higher-speed shots result in higher peak residual stress levels but also more severe surface roughening.Consequently,controlling shot peening operational parameters alone does not guarantee consistent shot peening enhancement effects.Process parameters such as shot size,shot velocity and shot type need to be considered along with execution parameters such as coverage and shot intensity to achieve precise control of shot peening results.
万方数据
维普
