Effects of Different Materials on Residual Stress Fields of Blade Damaged by Foreign Objects
Abstract
:1. Introduction
2. Materials and Methods
2.1. Material Parameters and Constitutive Model
2.2. Dynamic Numerical Simulation
- (1)
- This paper investigates the FOD behavior of the TC4 titanium alloy, a widely used material for aero-engine compressor blades;
- (2)
- In order to simulate the gas turbine blade, a rectangular specimen with a size of 75 mm × 56 mm × 3 mm was used as a model of the geometric shape of the blades to simplify the simulation. This simplification made it possible to focus on the mechanical response characteristics of the impact without considering the complex curvature of the blade;
- (3)
- The position where foreign objects collide with a blade is generally between at 60% and 100% of the blade height, so 80% of the blade height was selected as the impact point [29]. A hard spherical object with a radius of 1.5 mm was used to execute the impact at 80% of the blade height, on its leading edge, at a speed of 300 m/s, as shown in Figure 1.
2.3. Verification of Constitutive Model
3. Results
Residual Stress Distribution and Analysis
4. Discussion
5. Conclusions
- (1)
- When hard objects of the same size but composed of different materials impact the blade at the same speed, the size of the residual stress generated varies and is positively correlated with the density of the material. At the same time, the geometric size of the impact crater is related to the density of the material and the maximum residual tensile stress of the blade is related to the density ratio.
- (2)
- The residual stress caused by the impact of hard objects cannot be ignored, and the influence of residual stress should be considered when calculating the high-cycle fatigue life of damaged blades. The maximum residual tensile stress in the Z-axis direction caused by Q235 material impact reaches 93% of the blade yield stress.
- (3)
- The residual stress field generated by FOD has different trends in different directions, among which the residual tensile stress in the axial and circumferential direction is relatively large, and the reduction effect on the fatigue strength of the blade needs special attention.
- (4)
- Based on the above simulation results, we suggest that the evaluation of fatigue strength degradation caused by FOD must consider not only geometric changes, but also the type of material and the relative density of the specimen.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Materials | Parameters | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ρ/(kg/m3) | E/GPa | υ | A | B | n | C | m | D1 | D2 | D3 | D4 | D5 | |
TC4 | 4430 | 105 | 0.31 | 1078 | 1092 | 0.38 | 0.014 | 1.1 | −0.09 | 0.27 | −0.48 | −0.014 | 3.87 |
2A12 | 2770 | 71.7 | 0.33 | 400 | 989 | 0.654 | 0.001 | 1.426 | 0.116 | 0.211 | −2.172 | 0.012 | −0.01256 |
Q235 | 7850 | 200 | 0.33 | 244.8 | 899.7 | 0.94 | 0.0391 | 0.757 | −43.408 | 44.608 | 0.016 | 0.0145 | 0.046 |
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Yin, W.; Liu, Y.; He, X.; Li, H. Effects of Different Materials on Residual Stress Fields of Blade Damaged by Foreign Objects. Materials 2023, 16, 3662. https://doi.org/10.3390/ma16103662
Yin W, Liu Y, He X, Li H. Effects of Different Materials on Residual Stress Fields of Blade Damaged by Foreign Objects. Materials. 2023; 16(10):3662. https://doi.org/10.3390/ma16103662
Chicago/Turabian StyleYin, Wangtian, Yongbao Liu, Xing He, and Hongsong Li. 2023. "Effects of Different Materials on Residual Stress Fields of Blade Damaged by Foreign Objects" Materials 16, no. 10: 3662. https://doi.org/10.3390/ma16103662