基于埋入式应变片的纤维缠绕压力容器的健康监测

肖飚; 杨斌; 胡超杰; 项延训; 轩福贞

doi:10.11858/gywlxb.20190726

基于埋入式应变片的纤维缠绕压力容器的健康监测

doi: 10.11858/gywlxb.20190726

华东理工大学机械与动力工程学院，上海　200237

基金项目: 国家重点研发计划（2018YFC0808800）；国家自然科学基金（11702097，51835003）；中央高校基本科研业务费（222201714015）

详细信息

作者简介:
肖　飚（1982－），男，博士研究生，主要从事压力容器结构健康监测及损伤检测技术研究. E-mail：yxiaobiao@ssei.cn

通讯作者:
杨　斌（1988－），男，博士，讲师，硕士生导师，主要从事复合材料压力容器的力学性能及健康监测研究. E-mail：yangbin@ecust.edu.cn

中图分类号: O347; O521.3
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出版历程
- 收稿日期: 2019-02-10
- 修回日期: 2019-03-07
- 发布日期: 2019-04-25

Structural Health Monitoring of Filament Wound Pressure Vessel by Embedded Strain Gauges

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

摘要

摘要: 在玻璃纤维缠绕金属内胆复合材料压力容器的制备过程中，将应变传感器埋在金属内胆与玻璃纤维/环氧树脂复合材料层之间，得到了具有原位监测功能的纤维缠绕压力容器。对该纤维缠绕压力容器开展水压疲劳和爆破实验。疲劳压力的最大值和最小值分别为25 MPa和2 MPa，最大疲劳周次为5700；打压爆破压力为零到爆破压力，打压速率为2 MPa/s。实验过程中，利用埋入式应变传感器原位监测了压力容器的应变变化，建立了不同载荷作用下纤维缠绕压力容器的应变与受载情况之间的关联。结果表明：采用埋入式应变传感器监测纤维缠绕压力容器的健康状况具有可行性；该方法在保护应变传感器不受外载荷破坏的前提下，原位监测了压力容器在疲劳和爆破实验中的应变变化趋势。
- 复合材料压力容器 /
- 健康监测 /
- 埋入式应变片 /
- 疲劳 /
- 爆破
Abstract: During the manufacturing process of a filament wound pressure vessel, we embed the strain gauges between the metal tank and glass fiber reinforced epoxy composite layer to obtain the capability of in-situ monitoring . Experiments with a full-scale composite pressure vessel during hydraulic fatigue cycling and pressurization are performed. The maximum and minimum pressures in the fatigue test are set as 25 and 2 MPa, and the maximum cycle number is set as 5700 cycles, respectively. The pressurization speed is set as 2 MPa/s from 0 MPa to busting pressure. The strain of the pressure vessel in the two loading tests is monitored by the embedded strain gauge. The relationship between the stain and the loading conditions of the pressure vessel was thus built. Results show that, by embedding the strain gauges during the processing, it is possible to monitor the health status of the vessel under hydraulic fatigue cycling and pressurization load without hurting the sensors by the external load.
- filament wound pressure vessel /
- structural health monitoring /
- embedded strain gauge /
- fatigue /
- bursting

HTML全文

图 1 具有原位监测功能的复合材料压力容器制备过程：（a）纤维缠绕工艺，（b）粘贴在金属内胆的应变片，（c）带有埋入式应变片的纤维缠绕压力容器

Figure 1. Preparation of the filament wound pressure vessel with the embedded strain gauges: (a) the fiber winding processing; (b) the strain gauges attached on the inner steel tank; (c) the pressure vessel with the embedded stain gauges

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图 2 纤维缠绕压力容器原位监测装置

Figure 2. Experimental setup for in-situ monitoring the filament wound pressure vessel

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图 3 水压疲劳实验参数

Figure 3. Parameters of hydraulic fatigue cycling

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图 4 埋入式应变片测得的第3000～3300周疲劳时的应变（a）及局部放大图（b）

Figure 4. Strain monitored by the embedded strain gauge during the 3000th–3300th cycles fatigue test (a) and the zoomed-in plot (b)

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图 5 埋入式应变片测得的第5100～5700周疲劳时的应变（a）及局部放大图（b）

Figure 5. Strain monitored by the embedded strain gauge during the 5100th–5700th cycles fatigue test (a) and the zoomed-in plot (b)

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图 6 打压至爆破过程中未经疲劳（a）和经过5700周疲劳（b）的纤维缠绕压力容器的应变变化

Figure 6. Strain monitored by the embedded strain gauge during the bursting test: (a) before the test and (b) after 5700 cycles fatigue test

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图 7 打压爆破失效的纤维缠绕压力容器

Figure 7. Filament wound pressure vessel after bursting

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图 8 打压至5 MPa和15 MPa的纤维缠绕压力容器应变监测图

Figure 8. Strain monitored by the embedded strain gauge during pressurization: (a) up to 5 MPa, and (b) up to 15 MPa

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表 1 纤维缠绕压力容器中金属内胆参数

Table 1. Parameters of the inner metal tank in the filament wound pressure vessel

Material	External diameter/mm	Wall thickness /mm	Height /mm	Weight /kg	Volume /L	Work pressure /MPa	Top pressure /MPa
30CrMo steel	325	5	750	45.3	55	20	34

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表 2 纤维缠绕压力容器打压疲劳试验参数

Table 2. Parameters of the hydraulic fatigue cycling

Media	Cycling rate	Minimum pressure/MPa	Rising pressure time/s	Minimum pressure holding time/s
Water	7.8	2	3.1	2

Temperature/℃	Cycle times	Maximum pressure/MPa	Pressure drop time/s	Maximum pressure holding time/s
11.2	5700	25	0.6	2

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表 3 不同纤维缠绕压力容器在不同压力下的最大应变

Table 3. Maximum strain of the pressure vessel at various pressures

Pressure/MPa	Maximum strain
Pressure/MPa	Without fatigue and groove	Without fatigue, with groove	Fatigue, without groove	Fatigue, with groove
5	–120	–100	–400	–1000
10	–160	–150	–1200	–1200
15	–300	–300	–1200	–1200
20	–500	–500	–1500	–1500
25	–600	–650

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