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首页> 外文期刊>Composite Structures >Durability of composite assemblies under extreme conditions:Thermomechanical damage prediction of a double-lap bonded composite assembly subject to impact and high temperature
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Durability of composite assemblies under extreme conditions:Thermomechanical damage prediction of a double-lap bonded composite assembly subject to impact and high temperature

机译：复合材料组件在极端条件下的耐久性：双搭接复合材料组件在冲击和高温下的热机械损伤预测

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摘要

The objective of this study is to simulate and predict the thermomechanical damage of composite material assemblies subjected to impact load while in a high temperature environment. Three-dimensional models were developed for a glass-fiber reinforced vinyl ester double-lap bonded composite assembly subject to combined mechanical and high thermal loads. Both thermal and mechanical models were implemented in the finite element analysis software Abaqus, using sequential heat transfer and dynamic implicit simulations. The thermal model is customized to properly simulate the thermal behavior of composites and generate accurate results while the mechanical model uses the existing functions of Abaqus. For a double-lap composite assembly, thermomechanical failure is predicted in the adhesive zone, at the adherent/adhesive interface, as the adhesive deteriorates at the early stages of exposure. The adherent also deteriorates but at a slower rate. Furthermore, stress concentration is observed at the edges of the stress distribution along the adhesive length, while the average stress along the length decreases gradually as a function of the fire exposure time. The conducted simulations made it possible to predict the stress distribution field variation as a function of time in the double-lap bonded assembly under a combined thermal-impact load. This would serve as a valuable tool for composite structure designers in sizing bonded composite assemblies for their structural projects, as the specifications for certain structures impose a time of evacuation of the structure during a shock and triggering of a fire.
机译：这项研究的目的是模拟和预测高温环境下承受冲击载荷的复合材料组件的热机械损伤。针对玻璃纤维增​​强的乙烯基酯双搭接粘合复合材料组件的三维模型，该模型受到了机械和高热负荷的共同作用。使用顺序传热和动态隐式仿真，在有限元分析软件Abaqus中实现了热模型和力学模型。定制热模型可正确模拟复合材料的热行为并生成准确的结果，而机械模型则使用Abaqus的现有功能。对于双搭接复合组件，由于粘合剂在暴露的早期阶段会变质，因此在粘合剂/粘合剂界面处的粘合剂区域会发生热机械故障。附着物也会变质，但速度较慢。此外，在沿胶粘剂长度的应力分布的边缘观察到应力集中，而沿长度的平均应力则根据着火时间逐渐减小。进行的仿真使得在复合热冲击载荷作用下，双搭接粘结组件中应力分布场随时间的变化成为可能。这将为复合结构设计人员在确定用于其结构项目的粘合复合组件的尺寸时提供有价值的工具，因为某些结构的规格会在冲击和引发火灾期间增加结构的疏散时间。

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  • 来源
    《Composite Structures》 |2019年第4期|58-70|共13页
  • 作者

    Rizk Georgio; Nahas Roula; Khalil Khaled; Challita Georges; Legrand Vincent; Casari Pascal; Jacquemin Frederic;

  • 作者单位

    Univ Libanaise, Fac Genie, Unite MMC, CRSI, Campus Hadath, Beirut, Lebanon|Univ Nantes, Ecole Cent Nantes, Inst Rech Genie Civil & Mecan GeM, UMR CNRS 6183,Equipe Etat Mecan & Microstruct Mat, 58 Rue Michel Ange,BP 420, F-44606 St Nazaire, France;

    Univ Libanaise, Fac Genie, Unite MMC, CRSI, Campus Hadath, Beirut, Lebanon;

    Univ Libanaise, Fac Genie, Unite MMC, CRSI, Campus Hadath, Beirut, Lebanon;

    Univ Libanaise, Fac Genie, Unite MMC, CRSI, Campus Hadath, Beirut, Lebanon;

    Univ Nantes, Ecole Cent Nantes, Inst Rech Genie Civil & Mecan GeM, UMR CNRS 6183,Equipe Etat Mecan & Microstruct Mat, 58 Rue Michel Ange,BP 420, F-44606 St Nazaire, France;

    Univ Nantes, Ecole Cent Nantes, Inst Rech Genie Civil & Mecan GeM, UMR CNRS 6183,Equipe Etat Mecan & Microstruct Mat, 58 Rue Michel Ange,BP 420, F-44606 St Nazaire, France;

    Univ Nantes, Ecole Cent Nantes, Inst Rech Genie Civil & Mecan GeM, UMR CNRS 6183,Equipe Etat Mecan & Microstruct Mat, 58 Rue Michel Ange,BP 420, F-44606 St Nazaire, France;

  • 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

    Double-lap bonded joints; Composite material assemblies; Impact; High temperature resistance; Numerical simulation; Thermo-mechanical analysis;

    机译：双搭接接头;​​复合材料组件;冲击;耐高温;数值模拟;热力学分析;

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