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首页> 外文期刊>Composite Structures >Rapid prediction method of failure load for hygrothermally aged CFRP - Aluminum alloy single lap joints
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Rapid prediction method of failure load for hygrothermally aged CFRP - Aluminum alloy single lap joints

机译：湿热老化CFRP - 铝合金单圈关节快速预测方法

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摘要

This paper presents an experimental study on the durability of adhesively bonded carbon fiber reinforced polymer (CFRP) - aluminum alloy single lap joints (SLJs) that are undergoing hygrothermal degradation. The failure loads of hygrothermally aged joints were measured and the corresponding fracture surfaces were investigated via visual observation and SEM. The variations of the T-g and the chemical components were determined by the DSC and FTIR analysis, respectively. The results demonstrate that the failure load of joints decreases nonlinearly as the aging duration increases, which approximates the exponential function. Cohesive failure is dominated before and after aging, meanwhile, the moisture absorption plasticizes the adhesive and leads to rougher fracture surfaces. The reduction in T-g and the FTIR results support the occurrence of a hydrolysis reaction in the adhesive due to hygrothermal aging. By quantitatively studying the relationship between the failure loads and the absorbance intensities of functional groups, a failure load prediction method was proposed. This method can establish the correspondence relationship between accelerated aging and actual service aging based on the chemical characteristics of adhesive, and realize the residual performance prediction of the bonding structure after hygrothermal aging rapidly and easily.
机译：本文介绍了正在进行湿热降解的粘合粘结碳纤维增强聚合物（CFRP） - 铝合金单圈接头（SLJ）的实验研究。测量了湿热老节接头的破坏载荷，并通过视觉观察和SEM研究了相应的骨折表面。通过DSC和FTIR分析测定T-G和化学成分的变化。结果表明，随着老化持续时间的增加，关节的故障载荷不会降低，这近似于指数函数。同时和后，粘性衰竭占主导地位，同时，吸湿性吸收粘合剂并导致粗糙的骨折表面。 T-G的还原和FTIR结果支持由于湿热老化引起的粘合剂中的水解反应的发生。通过定量地研究失效载荷与官能团的吸光度强度之间的关系，提出了一种故障负荷预测方法。该方法可以基于粘合剂的化学特性建立加速老化和实际服务老化之间的对应关系，并在快速且容易地实现湿热老化后粘接结构的剩余性能预测。

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  • 来源
    《Composite Structures》 |2020年第11期|112603.1-112603.10|共10页
  • 作者

    Mu Wenlong; Na Jingxin; Wang Guangbin; Tan Wei; Xu Qianhui; Feng Yao;

  • 作者单位

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China|Jilin Univ Electron Microscopy Ctr Changchun 130012 Peoples R China|Henan Agr Univ Coll Mech & Elect Engn Zhengzhou 450002 Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China|Jilin Univ Electron Microscopy Ctr Changchun 130012 Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China;

    Jilin Univ State Key Lab Automot Simulat & Control Changchun 130022 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CFRP; Adhesively bonded SLJs; Hygrothermal aging; FTIR analysis; Failure load prediction;

    机译：CFRP;粘合粘合的SLJS;湿热老化;FTIR分析;故障负荷预测;

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