Materials Reports  2021, Vol. 35 Issue (Z1): 367-370 |
| METALS AND METAL MATRIX COMPOSITES |
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| Experiment Study and Failure Mode Analysis on Static Strength of Titanium Honeycomb Sandwich Wedge Structure |
| YAO Gang1, LIU Yanteng2, DENG Yunhua3, XU Runzhou3, ZHAO Wei4
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1 Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu 610000, China
2 Chengdu Aircraft Design and Research Institute, Chengdu 610000, China
3 AVIC Manufacturing Technology Institute, Beijing 100024, China
4 School of Astronautics, Northwestern Polytechnical University, Xi'an 710000, China |
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Abstract Due to its light weightiness, high specific strength and stiffness, good sound-reduction and heat-resistance properties, titanium honeycomb sandwich structure has been widely used in aeronautical and aeronautical fields. Static strength and failure mode of full height titanium honeycomb sandwich structures were studied and the effect of typical defects on the static strength and failure mode were investigated in this study. Results show that all titanium honeycomb sandwich wedge structures with or without brazing defect were not fractured at limit load that is 67% design load, which indicates that titanium honeycomb sandwich structures have good load bearing capacity. Single defect with the equivalent area of Φ45 mm has less influence on the static strength and failure mode of titanium honeycomb sandwich structures. Two defects with the equi-valent area of Φ30 mm have significant influence on the static strength of titanium honeycomb sandwich structures. Load bearing capacity of tita-nium honeycomb sandwich structures is decreased notably and interface facture failure between face sheet and honeycomb core is easily occurred. Titanium honeycomb sandwich structure with L direction honeycomb core is suggested to the actual aircraft component due to the static strength of all titanium honeycomb sandwich wedge structures with L direction honeycomb core is larger than that with L direction honeycomb core.
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Published: 16 July 2021
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| About author:: Gang Yao, engineer of Aviation Industry Chengfei Company, bachelor degree. He was born on May 1, 1973 in Shehong City, Sichuan Province, and worked in the sheet clamp processing plant of Aviation Industry Chengfei Company. He was mainly engaged in sheet metal forming and assembly of thin-wall materials such as titanium alloy, high-energy electron beam welding, laser welding, honeycomb brazing, catheter manufactu-ring and connection and other manufacturing processes. He ever participated in the research on the key technology of flat tube compression molding during the development of the ARJ21 aircraft, a key project established during the National Eleventh Five-year Plan, and its technical achievements were at the international leading level. |
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