航空学报 > 2022, Vol. 43 Issue (6): 525518-525518   doi: 10.7527/S1000-6893.2021.25518

含穿透型损伤层合板修理构型的湿热振动特性

贾宝惠, 单金洋, 卢翔, 王杜   

  1. 中国民航大学 航空工程学院, 天津 300300
  • 收稿日期:2021-03-18 修回日期:2021-06-21 出版日期:2022-06-15 发布日期:2021-06-18
  • 通讯作者: 贾宝惠,E-mail:jiabaohui@sina.com E-mail:jiabaohui@sina.com
  • 基金资助:
    国家自然科学基金(U2033209);中国民航大学研究生科研创新资助项目(10503215)

Hygrothermal vibration characteristics of repaired structures of laminates with penetrating damage

JIA Baohui, SHAN Jinyang, LU Xiang, WANG Du   

  1. College of Aerospace Engineering, Civil Aviation University of China, Tianjin 300300, China
  • Received:2021-03-18 Revised:2021-06-21 Online:2022-06-15 Published:2021-06-18
  • Supported by:
    National Natural Science Foundation of China (U2033209); Graduate Scientific Research and Innovation Project of Civil Aviation University of China

摘要: 通过理论推导和数值仿真研究了湿热效应对碳纤维复合材料层合板不同修理构型的振动特性影响。基于哈密顿原理和一阶剪切变形理论,同时考虑温湿度场的等效原理建立了湿热环境下多自由度复合材料层合板的本构方程,并利用有限元法推导了层合板在湿热作用下的振动控制方程。利用商用软件ABAQUS建立了阶梯型胶接修理模型,从振型分析的角度对比了含、不含附加补片的单/双面胶接修理构型的振动特性,并讨论了温度、湿度、温湿度对不同修理构型振动特性的影响。结果表明:湿热效应影响下铺设附加补片可避免胶接区域局部变形过大,在提高结构的刚度和稳定性的同时延缓湿热屈曲现象的发生;含有附加补片的双面胶接修理构型可避免结构产生附加弯曲,提高修理后结构的稳定性;温湿环境共同作用比湿环境、热环境单一作用对复合材料层合板固有频率的影响大,且含附加补片的双面胶接修理构型较单面胶接修理构型对温湿度影响的敏感性低。

关键词: 湿热环境, 振动特性, 胶接修理, 附加补片, 穿透型损伤

Abstract: Through theoretical derivation and numerical simulation, the vibration characteristics of different repaired structures of carbon fiber composite laminates under the influence of hygrothermal environment were studied. Based on the Hamilton principle and the Mindlin-Reissner plate theory and considering the equivalence of hygrothermal expansion, a constitutive equation of multi-degree-of freedom composite laminates in the hygrothermal environment was established, and the vibration governing equation of laminates in the hygrothermal environment was solved by using the finite element method. A finite element model of bonded repaired structure was established by ABAQUS. The vibration characteristics of the single- and double-sided bonded repaired structures with and without additional patches were compared from the perspective of vibration mode analysis, and the effects of temperature, humidity, and humiture on the vibration characteristics of different bonded repaired structures were discussed. The results show that under the influence of hygrothermal effect, laying additional patches can avoid excessive local deformation in the bonded area, improve the stiffness and stability of the structure, and delay the occurrence of hygrothermal buckling. The double-sided bonded repaired structure with additional patches can avoid additional bending of the structure and reduce the burden of the adhesive layer. The combined effect of temperature and humidity is greater than the single effect of temperature or humidity on composite laminates, and the sensitivity of double-sided bonded repair structures with additional patches to the effect of temperature and humidity is lower than that of single-sided bonded repair structure.

Key words: hygrothermal condition, vibration characteristic, bonded repair, additional patch, penetrating damage

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