结构/防热一体化<i>ϕ</i>480 mm复合材料壳体水压实验的声发射特征

惠雪梅; 张岗; 侯晓; 崔红; 张承双; 包艳玲

doi:10.11868/j.issn.1005-5053.2021.000201

结构/防热一体化ϕ480 mm复合材料壳体水压实验的声发射特征

doi: 10.11868/j.issn.1005-5053.2021.000201

惠雪梅^{1, 2, ,},
张岗³,
侯晓⁴,
崔红^{1, 2},
张承双^{1, 2},
包艳玲^{1, 2}

1.
西安航天复合材料研究所, 西安710025
2.
陕西省航天复合材料重点实验室, 西安710025
3.
航天动力技术研究院, 西安710025
4.
中国航天科技集团有限公司, 北京100048

基金项目: 国家自然科学联合基金资助项目（U1837601）

详细信息

通讯作者:
惠雪梅（1975—），女，硕士，高级工程师，研究方向为耐高温树脂配方及其碳纤维复合材料制备技术，联系地址：陕西西安灞桥区洪庆街宇航东路科研三区（710025），E-mail：hxm_xian@163.com

中图分类号: TB553;TH49
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- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-30
- 修回日期: 2022-01-06
- 网络出版日期: 2022-04-22

Acoustic emission characteristics of ϕ480 mm composite shell with structure and heat protection integration during water pressure test

HUI Xuemei^{1, 2
, ,},
ZHANG Gang³,
HOU Xiao⁴,
CUI Hong^{1, 2},
ZHNAG Chengshuang^{1, 2},
BAO Yanling^{1, 2}

1.
Xi’an Aerospace Composites Research Institute, Xi’an 710025, China
2.
Academy of Aerospace Solid Propulsion Technology, Xi’an 710025, China
3.
Shaanxi Key Laboratory of Aerospace Composites, Xi’an 710025, China
4.
China Aerospace Science and Technology Corporation, Beijing 100048, China

摘要

摘要: 为了满足未来高速高加速战术导弹对壳体承载能力和防热功能的要求，采用干法缠绕工艺制备结构/防热一体化ϕ480 mm复合材料壳体，其中结构层采用T700碳纤维/氰酸酯复合材料，防热层采用复合防热结构，进行壳体内压检验、声发射和水压爆破实验，研究内压作用下壳体的应变变化规律，判断复合材料损伤类型，预测壳体破坏位置，评价外防热材料的结构完整性，考核壳体承受内压载荷的能力。结果表明：结构/防热一体化ϕ480 mm壳体应变与压强呈线性关系，随压强的升高而增大；ϕ480 mm壳体在内压作用下出现树脂开裂、单丝断裂、纤维束断裂和分层等声发射信号，分布在前后封头区域，二次加载后费利西蒂（Felicity）比为0.96；壳体的爆破压强为18.6 MPa，容器特性系数达到42.1 km，后封头区域出现宏观纤维断裂现象；防热层材料表面出现少量纤维起毛、断丝和发白现象，未出现分层和脱落，保持较好的结构完整性。
- 结构/防热一体化 /
- 氰酸酯树脂 /
- 爆破压强 /
- 声发射 /
- 费利西蒂比
Abstract: In order to meet the high requirements of future high-speed and high acceleration tactical missiles for shell bearing capacity and heat protection function, the integrated structure-heat protection ϕ480 mm composite shell was prepared by dry winding process, in which the structure layer adopted T700 carbon fiber/cyanate ester composite, and the heat protection layer adopted composite heat protection structure. The internal pressure, acoustic emission and hydraulic burst tests had been done for integrated structure-heat protection ϕ480 mm shell. The strain variation law, the damage type and damage location of Ф480mm composite shell were researched. The structural integrity of external heat protection materials was evaluated. The capacity of bearing internal pressure load was also assessed for the integrated structure-heat protection Ф480mm composite shell. The results show that the strain of Ф480mm composite shell is linear with the pressure and increased with the raising pressure. The acoustic emission signals, such as resin cracking, monofilament fracture, fiber bundle fracture and delamination are distributed in the dome aeras under the internal pressure. The Felicity ratio of ϕ480 mm composite shell is 0.96 after secondary loading. The bursting pressure of ϕ480 mm composite shell is 18.6 MPa, and the vessel characteristic coefficient reaches 42.1 km. The fiber fracture occurs in the dome areas. A small amount of fiber fuzzing, broken wire and whitening appeared on the surface of the heat resistant layer material, and no delamination and shedding occurred, maintaining good structural integrity.
- structure and heat protection integration /
- cyanate ester /
- burst pressure /
- acoustic emission /
- Felicity ratio

HTML全文

图 1 ϕ480 mm复合材料壳体测试系统

Figure 1. Experimental system for ϕ480 mm composite shell

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图 2 ϕ480 mm复合材料壳体应变和传感器分布图

Figure 2. Distribution diagram of strains and sensors for ϕ480 mm composite shell

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图 3 结构-防热一体化ϕ480 mm复合材料壳体圆筒段应变-压强曲线　（a）环向应变;（b）轴向应变

Figure 3. Strain-pressure curves of cylinder section of ϕ480 mm structure-heat protection integrated composite shell 　（a）hoop strain;（b）axial strain

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图 4 结构-防热一体化ϕ480mm复合材料壳体声发射特征曲线　（a）压强-时间曲线；（b）事件-时间曲线；（c）累积能量-时间曲线；（d）事件-通道曲线

Figure 4. Acoustic emission curves of ϕ480mm structure-heat protection integrated composite shell 　（a）pressure-time curve；（b） event-time curve；（c）accumulative energy-time curve；（d） event-channel curve

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图 5 中高幅度、短持续时间事件的声发射信号　（a）中高幅度、短时间事件-时间分布；（b）中高幅度、短时间事件-通道分布

Figure 5. Acoustic emission signals of medium-high amplitude and short duration events 　（a）medium-high amplitude short duration event-time distribution ;（b）medium-high amplitude short duration event-channel distribution

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图 6 高幅度、长持续时间事件的声发射信号　（a）高幅度、长持续时间事件-时间分布；（b）高幅度、长持续时间事件-通道分布

Figure 6. Acoustic emission signals of large amplitude and long duration events 　（a）high amplitude long duration event-time distribution;（b）high amplitude long duration event-channel distribution

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图 7 结构-防热一体化ϕ480 mm壳体压强曲线和爆破残骸　（a）爆破压强-时间曲线；（b）水压爆破残骸

Figure 7. Pressure curve and remain of ϕ480 mm composite shell after hydraulic burst test 　（a）burst pressure and time curve；(b) remain after hydraulic burst test

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