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首页> 外文期刊>Journal of the American Helicopter Society >Modeling and Simulation of Cure Kinetics and Flow in Cavity-Molded Composites
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Modeling and Simulation of Cure Kinetics and Flow in Cavity-Molded Composites

机译：模腔成型复合材料固化动力学和流动的建模与仿真

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摘要

Cavity molding is often used in rotorcraft industries to manufacture thick composite flex-beams with high viscosity resins. The curing of thermosetting resins used in these applications is accompanied by an exothermic reaction that can cause internal stresses and result in structural defects in thick composite structures. The objective of this work is to develop advanced computational models for cavity-molded thick composite flex-beams and investigate factors that determine success of the process. A three-dimensional coupled cure and flow finite element model is developed for simulating cure and flow processes in a composite flex-beam. The cure kinetic parameters for finite element modeling are derived from experiments. Isothermal and dynamic differential scanning calorimetry (DSC) tests are conducted to study the resin behavior. Finite element simulations are performed to predict resultant temperature distribution, degree of cure at different cross sections, and resin flow in the flex-beam. An artificial neural networks (ANN)-based procedure is developed to extract the cure kinetic parameters from DSC scans. Also, an ANN-based model is developed and integrated with a thermomechanical finite element model to optimize the cure cycle for a cavity-molded composite flex-beam.
机译：模腔成型通常用于旋翼飞机行业中，以制造具有高粘度树脂的厚复合挠性梁。在这些应用中使用的热固性树脂的固化伴随着放热反应，该放热反应可能导致内部应力并导致厚复合结构中的结构缺陷。这项工作的目的是为模腔成型的厚复合挠性梁开发先进的计算模型，并研究确定该过程成功的因素。建立了三维耦合固化和流动有限元模型，用于模拟复合柔性梁中的固化和流动过程。有限元建模的固化动力学参数来自实验。进行等温和动态差示扫描量热法（DSC）测试以研究树脂的行为。进行有限元模拟以预测最终的温度分布，不同横截面的固化程度以及柔性梁中的树脂流动。开发了基于人工神经网络（ANN）的程序，可从DSC扫描中提取固化动力学参数。此外，还开发了基于ANN的模型，并将其与热机械有限元模型集成在一起，以优化模腔成型复合挠性梁的固化周期。

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  • 来源
    《Journal of the American Helicopter Society》 |2016年第2期|022004.1-022004.10|共10页
  • 作者

    Bheemreddy V.; Huo Z.; Chandrashekhara K.; Brack R. A.;

  • 作者单位

    Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO USA;

    Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO USA;

    Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO USA;

    Bell Helicopter Textron Inc, Ft Worth, TX USA;

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