基于精细化模型的纤维缠绕压力容器失效行为及容积特性影响因素分析

doi:10.19936/j.cnki.2096-8000.20210528.031

复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (12): 40-47.DOI: 10.19936/j.cnki.2096-8000.20210528.031

基于精细化模型的纤维缠绕压力容器失效行为及容积特性影响因素分析

祖磊¹, 金书明¹, 张骞^1*, 张桂明¹, 吴乔国²

1.合肥工业大学机械工程学院,合肥230009;
2.合肥工业大学土木与水利工程学院,合肥230009

收稿日期:2021-02-25 出版日期:2021-12-28 发布日期:2022-01-07
通讯作者: 张骞(1990-),男,博士,讲师,主要从事复合材料力学与结构设计方面的研究,zq_hfut@126.com。
作者简介:祖磊(1983-),男,博士,教授,主要从事复合材料力学与结构设计方面的研究。
基金资助:
国家自然科学基金项目(51875159);安徽省重点研究与开发计划项目(201904d07020013)

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

ZU Lei¹, JIN Shu-ming¹, ZHANG Qian^1*, ZHANG Gui-ming¹, WU Qiao-guo²

1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;
2. College of Civil Engineering, Hefei University of Technology, Hefei 230009, China

Received:2021-02-25 Online:2021-12-28 Published:2022-01-07

摘要/Abstract

摘要： 本文通过开展纤维缠绕压力容器水压爆破试验,结合数值仿真分析,探究其失效机理并分析了影响压力容器容积特性的因素。通过三维扫描仪测量出缠绕层的实际轮廓,对比三次样条公式预测的厚度,结合有限元软件Abaqus及Python脚本文件,给出了一种纤维缠绕压力容器的精细化建模方法,该方法直观且准确地描述每一个纤维缠绕层,通过在纤维缠绕层间加入内聚力单元表征层间损伤情况,利用三维Hashin失效准则对单元刚度进行衰减来实现复合材料层渐进失效分析,从而更加精确地预测压力容器的爆破压强;并结合试验测试结果对纤维缠绕压力容器失效行为进行分析;最后,基于该数值模型,开展了压力容器容积特性影响因素分析。结果表明:①三次样条厚度预测方法能较为准确地预测测地线纤维缠绕层在封头处的厚度分布情况;②采用缠绕层逐层建立并在层间插入黏性层单元,结合Hashin失效判据的渐进损伤计算方法,能够精准、全面以及直观地判断压力容器的各种损伤情况;③压力容器水压实验打爆结果为76 MPa,与有限元计算结果误差为3.3%,且位移应变结果与实际测量值误差在10%以内,表明通过载荷位移曲线破坏位置的位移突变确定爆破压强是合理的;④对于Ⅲ型压力容器,可以通过增大设计爆压提高容器的容积特性系数,且相同容积的压力容器的容积特性随着长径比的增加而减小。

关键词: 纤维缠绕压力容器, 封头精细化建模, 内聚力单元, 三维Hashin失效准则, 容积特性, 复合材料

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

中图分类号:

TB332

祖磊, 金书明, 张骞, 张桂明, 吴乔国. 基于精细化模型的纤维缠绕压力容器失效行为及容积特性影响因素分析[J]. 复合材料科学与工程, 2021, 0(12): 40-47.

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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基于精细化模型的纤维缠绕压力容器失效行为及容积特性影响因素分析

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

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