Effect of Initial Crack Position on Crack Propagation Behaviors of Heavy-Duty Transmission Gear
Abstract
:1. Introduction
2. Modeling and Experimental Methods
2.1. Numerical Model
2.2. The Gear Material and Heat Treatment Process
2.3. Single-Tooth Bending Fatigue Testing
3. Results and Discussions
3.1. Simulation Results
3.2. Testing Results of the Strain on the Root Surface
3.3. Validation of the Model
3.4. Effect of Initial Crack Location on Crack Propagation Behavior
4. Conclusions
Author Contributions
Funding
Informed Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value |
---|---|
Number of teeth | 23 |
Normal modulus/mm | 4 |
Pressure angle/° | 20 |
Gear width/mm | 34 |
Material | 20Cr2Ni4A |
Poison ratio | 0.3 |
Elastic modulus/GPa | 206 |
C1 | 0.001 |
C2 | 0 |
C3 | 1.24 × 10−4 |
C4 | 1.03 |
Crack Location | P1 | P2 | P3 | P4 | P5 |
---|---|---|---|---|---|
Distance from the end face/mm | 0 | 4.2 | 8.3 | 12.4 | 16.5 |
C | Cr | Ni | Mn | Si | Fe |
---|---|---|---|---|---|
0.15~0.19 | 1.25~1.65 | 3.25~3.65 | 0.30~0.60 | 0.17~0.37 | Bal. |
Position of Strain Gauge | Position 1 | Position 2 | Position 3 | Position 4 |
---|---|---|---|---|
a/mm | 9.1 | 6.56 | 7.0 | 9.1 |
b/mm | 0 | 8.5 | 24 | 34 |
Maximum Load/kN | Mean Load/kN | Alternating Load/kN | Loading Frequency/Hz | Stress Ratio | Maximum Root Bending Stress /MPa |
---|---|---|---|---|---|
40 | 20.8 | 19.2 | 100 | 0.04 | 639 |
Initial Crack Location | P1 | P2 | P3 | P4 | P5 |
---|---|---|---|---|---|
Distance from the end face/mm | 2.8 | 4.0 | 12.1 | 15.3 | 17.1 |
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Zhang, Y.; Tang, Z.; Zhao, L.; Gong, B.; Wang, G.; Li, Z. Effect of Initial Crack Position on Crack Propagation Behaviors of Heavy-Duty Transmission Gear. Materials 2023, 16, 5961. https://doi.org/10.3390/ma16175961
Zhang Y, Tang Z, Zhao L, Gong B, Wang G, Li Z. Effect of Initial Crack Position on Crack Propagation Behaviors of Heavy-Duty Transmission Gear. Materials. 2023; 16(17):5961. https://doi.org/10.3390/ma16175961
Chicago/Turabian StyleZhang, Yingtao, Zirong Tang, Lijuan Zhao, Benxiang Gong, Gang Wang, and Zhichao Li. 2023. "Effect of Initial Crack Position on Crack Propagation Behaviors of Heavy-Duty Transmission Gear" Materials 16, no. 17: 5961. https://doi.org/10.3390/ma16175961