Mathematical Model and Verification of Residual Stress Induced by Water Jet Peening
Abstract
:1. Introduction
2. Mathematical Model for Calculating RS after WJP
2.1. Impact Pressure
2.2. Mathematical Model of RS
3. Simulation Model and Experimental Procedures
3.1. Finite Element Simulation Model
- The target material is isotropic elastic–plastic.
- Consistent with the mathematical model in Section 2.2, the impact pressure acting on the target surface is also assumed to be uniformly distributed [9,10,17,22].
- Previous work decreased the erosion to a minimum (i.e., erosion can be almost neglected) by increasing jet traverse velocity and adjusting other parameters [6]. In addition, Rajesh [12], Hsu [14], and Cho [16] et al. neglected erosion when studying WJP; thus, erosion was neglected in the finite element model.
3.1.1. Mesh and Boundary Conditions
3.1.2. Material and Load
3.2. Experimental Procedure
4. Results and Discussion
4.1. Comparison of Distribution of RS
4.2. Maximum Compressive RS under Different Jet Pressures
4.3. Depth of Compressive RS Layer under Different Jet Diameters
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Jet Diameter d (mm) | Water-Hammer Pressure PC (MPa) | Jet Traverse Velocity vf (mm/min) |
---|---|---|
0.3/0.45/0.6/0.75/1 | 403/450/515/622/676/755/859/920 | 4000 [6] |
Material | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
---|---|---|---|---|---|---|---|---|---|
Al6061-T6 | 0.4–0.8 | 0.7 | 0.15–0.4 | 0.15 | 0.8–0.12 | 0.004–0.3 | 0.25 | 0.15 | Allowance |
Material | Al6061-T6 Alloy |
---|---|
Destiny (kg/m3) | 2900 |
Elastic Modulus E (GPa) | 69 |
Poisson’s ratio μ | 0.33 |
Yield stress (MPa) | 265 |
Yield strain | 0.38% |
Ultimate tensile stress (MPa) | 345 |
Plastic strain corresponding to | 0.2 |
Hardening parameter | 283 |
Jet Pressure P (m/s) | Jet Center Distance DC (mm) | Jet Traverse Velocity vf (mm/min) | Jet Passes n | Nozzle Diameter dn (mm) | Standoff Distance (mm) |
---|---|---|---|---|---|
33/44/50/60 | 0.15 | 4000 | 5 | 0.3 | 3 |
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He, Z.; Li, C.; Zhao, S.; Cui, B.; Li, D.; Yu, H.; Chen, L.; Fu, T. Mathematical Model and Verification of Residual Stress Induced by Water Jet Peening. Metals 2019, 9, 936. https://doi.org/10.3390/met9090936
He Z, Li C, Zhao S, Cui B, Li D, Yu H, Chen L, Fu T. Mathematical Model and Verification of Residual Stress Induced by Water Jet Peening. Metals. 2019; 9(9):936. https://doi.org/10.3390/met9090936
Chicago/Turabian StyleHe, Zhanshu, Chao Li, Shusen Zhao, Beibei Cui, Dalei Li, Huixin Yu, Lei Chen, and Ting Fu. 2019. "Mathematical Model and Verification of Residual Stress Induced by Water Jet Peening" Metals 9, no. 9: 936. https://doi.org/10.3390/met9090936