Volume 38, Number 5, October 2020
|Page(s)||937 - 943|
|Published online||08 December 2020|
Exploring Strain Characteristics and Bearing Capacity of a Carbon Filament-Wound Composite Cylindrical Shell under Hydrostatic Pressure
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2 School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
3 Key Laboratory for Unmanned Underwater Vehicle, Northwestern Polytechnical University, Xi'an 710072, China
In order to study the strain characteristics and bearing capacity of a filament-wound composite cylindrical shell and its different dome structures under hydrostatic pressure, experiments were carried out. Firstly, static tests were conducted to study the axial and circumferential strain of the composite cylindrical shell on its different positions. The bearing capacity of the ellipsoid dome was compared with that of the hemisphere dome. The blasting test and the nonlinear analysis of the strain were conducted. The relationship between the strain trend and the crack propagation path was studied, and the structural failure mode was explored. The study shows that as the hydrostatic pressure increases, the strain increases and that the strain amplitudes of measuring points gradually appear different and show varying degrees of nonlinearity. Along the circumferential direction of the circumferential crack, the axial strain amplitude gradually decreases by 20%. But the circumferential strain amplitude gradually increases by 94%. As the load of the composite cylindrical shell increases to a certain extent, its final failure mode is strength failure, but its instability is not obvious.
Key words: hydrostatic pressure / fiber / cylindrical shell / strain / failure
关键字 : 静水压力 / 纤维 / 圆柱壳体 / 应变 / 失效
© 2020 Journal of Northwestern Polytechnical University. All rights reserved.
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