首页|Mechanical property of cylindrical sandwich shell with gradient core of entangled wire mesh

Mechanical property of cylindrical sandwich shell with gradient core of entangled wire mesh

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To explore the wide-frequency damping and vibration-attenuation performances in the application of aerospace components,the cylindrical sandwich shell structure with a gradient core of entangled wire mesh was proposed in this paper.Firstly,the gradient cores of entangled wire mesh in the axial and radial directions were prepared by using an in-house Numerical Control weaving machine,and the metallurgical connection between skin sheets and the gradient core was performed using vacuum brazing.Secondly,to investigate the mechanical properties of cylindrical sandwich shells with axial or radial gradient cores,quasi-static and dynamic mechanical experiments were carried out.The primary evaluations of mechanical properties include secant stiffness,natural frequency,Specific Energy Ab-sorption(SEA),vibration acceleration level,and so on.The results suggest that the vibration-attenuation performance of the sandwich shell is remarkable when the high-density core layer is at the end of the shell or abuts the inner skin.The axial gradient material has almost no influence on the vibration fre-quencies of the shell,whereas the vibration frequencies increase dramatically when the high-density core layer approaches the skin.Moreover,compared to the conventional sandwich shells,the pro-posed functional grading cylindrical sandwich shell exhibits more potential in mass reduction,stiffness designing,and energy dissipation.

Entangled wire meshGradient cylindrical sandwich shellVacuum brazingSecant stiffnessDamping

Xin Xue、Chao Zheng、Fu-qiang Lai、Xue-qian Wu

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Institute of Metal-rubber & Vibration Noise,School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou,350116,China

Fujian Metallurgical Industry Design Institute,Fuzhou,350116,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Fujian Province of ChinaNatural Science Foundation of Fujian Province of ChinaKey Project of National Defence Innovation Zone of Science and Technology Commission of CMC

1227209452205185519751232022J015412020J05102XXX-033-01

2024

10.1016/j.dt.2023.01.003

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.(1)
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