Failure behavior and influencing factors of volume characteristics of filament wound pressure vessel based on refined model

doi:10.19936/j.cnki.2096-8000.20210528.031

Abstract

Abstract: In this paper, the failure mechanism of filament wound pressure vessel was investigated by hydraulic burst test and numerical simulation analysis. The thickness of the winding layers measured by three-dimensional scanner was compared with that predicted by the cubic spline formula. A fine modeling method of the filament-wound pressure vessel was presented with the aid of the finite element software Abaqus and a Python script file. Each winding layer of the composite pressure vessel can be modeled intuitively and accurately by this method. The cohesive elements were employed to simulate the interlaminar damage of the winding layers. The progressive failure analysis of the composite layers based on the three-dimensional Hashin failure criteria and the stiffness degradation criteria was carried out, so as to predict precisely the burst pressure of the pressure vessel. Combined with the test results, the failure behavior of the filament wound pressure vessel was analyzed. Finally, based on the numerical model, the influencing factors of pressure vessel volume characteristics are analyzed. The results show that: ①The cubic spline method can accurately predict the thickness distribution of the domes based on the geodesic trajectories. ②The progressive damage method based on the Hashin failure criteria and the cohesive elements inserted two adjacent layers can accurately, comprehensively and intuitively predict the failure mode of the composite layers. ③The burst pressure of the pressure vessel by hydraulic test was 76 MPa, which was compared with finite element simulation result, and the error was 3.3%. The error between the displacement and strain results and the actual measured values is within 10%, indicating that it is reasonable to determine the burst pressure by the displacement mutation at the failure position. ④For type Ⅲ pressure vessel, the volume characteristic coefficient can be improved by increasing the design explosion pressure. The volume characteristics of pressure vessels with the same volume decrease with the increase of aspect ratio.

Key words: fiber winding pressure vessel, dome fine modeling, cohesive elements, 3D Hashin failure criterion, volume characteristics, composites

CLC Number:

TB332

ZU Lei, JIN Shu-ming, ZHANG Qian, ZHANG Gui-ming, WU Qiao-guo. Failure behavior and influencing factors of volume characteristics of filament wound pressure vessel based on refined model[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(12): 40-47.

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