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首页> 外文期刊>Composite Structures >Smart cure cycles for fiber metal laminates using embedded fiber Bragg grating sensors
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Smart cure cycles for fiber metal laminates using embedded fiber Bragg grating sensors

机译：使用嵌入式光纤布拉格光栅传感器的金属纤维层压板的智能固化周期

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摘要

In this paper, a smart cure cycle with an additional cooling step for co-cure bonded fiber metal laminates (FML) is developed to reduce process related thermal residual stresses. An online measuring technique with fiber Bragg grating (FBG) sensors is used to gain a clear understanding of the formation process of residual stresses during cure, as well as to determine the resulting residual stress level. Fiber optic sensors are integrated in carbon fiber reinforced plastic (CFRP) - steel laminates. The recorded processing strain curves enable the characterization of the mechanical interaction of the metal and CFRP-layers. By introducing an additional cooling-step, the moment of the connection between the individual components is being influenced. The conducted experiments show a significant reduction of the resulting stress-free temperature.A variety of temperature cycle modifications, like different cooling temperatures, as well as modified cooling and heating rates, are investigated. The impact of these parameters on the process-induced strains and stresses are detected by the fiber optic strain sensors. The thermal residual stresses are reduced by up to 23% for the specimens in focus, when the developed cure cycles with FBG sensors for a monitored cooling and reheating are used.
机译：在本文中，开发了一种智能固化周期，该固化周期具有用于共固化粘合纤维金属层压板（FML）的附加冷却步骤，以减少与过程相关的热残余应力。使用带有光纤布拉格光栅（FBG）传感器的在线测量技术可以清楚地了解固化过程中残余应力的形成过程，并确定产生的残余应力水平。光纤传感器集成在碳纤维增强塑料（CFRP）-钢层压板中。记录的加工应变曲线可以表征金属和CFRP层的机械相互作用。通过引入附加的冷却步骤，各个组件之间的连接时刻受到影响。进行的实验表明，所产生的无应力温度显着降低。研究了各种温度循环修改，例如不同的冷却温度以及修改后的冷却和加热速率。这些参数对过程引起的应变和应力的影响由光纤应变传感器检测。当使用带有用于监控冷却和再加热的FBG传感器的固化周期时，聚焦样品的热残余应力最多可降低23％。

著录项

  • 来源
    《Composite Structures》 |2019年第4期|252-260|共9页
  • 作者

    Prussak Robert; Stefaniak Daniel; Kappel Erik; Huehne Christian; Sinapius Michael;

  • 作者单位

    DLR, Inst Composite Struct & Adapt Syst, Lilienthalpl 7, D-38108 Braunschweig, Germany;

    DLR, Inst Composite Struct & Adapt Syst, Lilienthalpl 7, D-38108 Braunschweig, Germany;

    DLR, Inst Composite Struct & Adapt Syst, Lilienthalpl 7, D-38108 Braunschweig, Germany;

    DLR, Inst Composite Struct & Adapt Syst, Lilienthalpl 7, D-38108 Braunschweig, Germany|TU Braunschweig, Inst Adaptron & Funct Integrat, Langer Kamp 6, D-38110 Braunschweig, Germany;

    DLR, Inst Composite Struct & Adapt Syst, Lilienthalpl 7, D-38108 Braunschweig, Germany|TU Braunschweig, Inst Adaptron & Funct Integrat, Langer Kamp 6, D-38110 Braunschweig, Germany;

  • 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

    Fiber metal laminate; Residual stresses; Process monitoring; Fiber Bragg grating sensors;

    机译：纤维金属层压板;残余应力;过程监控;光纤布拉格光栅传感器;

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