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| Effect of Surface Strengthening on Fatigue Property of Thin Wall Hollow Structures |
| DENG Ying1,2,3, SHAO Jie1,2,3, GAI Pengtao1,2,3, ZHANG Jie1 |
1. AVIC Manufacturing Technology Institute, Beijing 100024, China;
2. Aeronautical Key Laboratory for Plastic Forming Technologies, Beijing 100024, China;
3. Beijing Key Laboratory of Digital Plasticity Forming Technology and Equipment, Beijing 100024, China |
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Abstract Hollow structure specimens which represent the similar topology of components are produced, and dry blast and wet blast are used to strengthen the surface. Then, fatigue tests are carried out. The experimental results show that the fatigue property of polished specimen is the lowest, and specimen by the dry blast process is higher and the fatigue life is as 10.4 times as that of polished specimen. The experimental results also show that the fatigue property of specimen by wet blast processed is the highest, and the fatigue life is at least as 3.3 times as that of specimen by dry blast processed. This conclusion can be useful to improve shot peening parameters.
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2018, 
