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| Experimental and Numerical Analysis of Coverage of TC4 Titanium Alloy by Ultrasonic Shot Peening |
| CAI Jin1, XIE Guang’an1, YAN Xue2, LI Wei1 |
1. Shenyang Aerospace University, Shenyang 110136, China;
2. AECC Shanghai Commercial Aircraft Engine Manufacturing Co., Ltd., Shanghai 200241, China |
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Abstract To explore the influence of ultrasonic shot peening process parameters (spheres number, spheres diameter) on the surface coverage of components, based on ABAQUS/Explicit, combined with ultrasonic shot peening experiment, a three-dimensional finite element model of ultrasonic shot peening (chamber geometry model, batch spheres model, vibration system, Johnson–Cook material constitutive model) is established. Six groups of models are established around two process parameters and ultrasonic shot peening time. The image J coverage image analysis of the equivalent strain field on the surface of component is combined to realize the establishment of the ultrasonic shot peening surface coverage prediction system. The coverage of the 100, 150 and 200 spheres models in 10s are 16.6%, 36.2% and 48.1% respectively. The coverage of the 0.5mm, 1mm and 2.5mm diameter spheres models at 10s are 0, 8.1% and 16.6% respectively. The errors between the experimental value and the simulated value of the spheres number and diameter variables are 7.5% and 9.2%, which are both less than 10%. The results show that the increase in the number and diameter of spheres can increase the surface coverage. Within the range of common parameters, the impact of spheres diameter on the coverage of the initial impact plasticity critical value is more significant. After the spheres diameter reaches the impact plasticity critical value, the increase in coverage caused by the number of spheres is more significant. Compared with increasingn the number of spheres, the increase in the diameter of the spheres will increase the coverage more significantly. Through the numerical analysis of the coverage of process simulation, effective prediction of the surface coverage of ultrasonic shot peening can be realized.
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2021, 
