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Optimization of variable stiffness composites with embedded defects induced by Automated Fiber Placement

机译：由自动纤维放置引起的具有嵌入缺陷的可变刚度复合材料的优化

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摘要

Variable stiffness composite laminates can be manufactured using Automated Fiber Placement (AFP) technology. An improvement in structural performance can be achieved by tailoring their material properties in directions that are more favorable to carry loads. During AFP manufacturing, however, the formation of defects, mainly gaps and overlaps, is inevitable. The extent of a defected zone is generally controlled by two sets of parameters: design parameters; and manufacturing parameters. In this work, we investigate how the parameters governing the formation of defects impact the set of optimal solutions for a multi-objective optimization problem, where in-plane stiffness and buckling load are simultaneously maximized. It is found that increasing the number of tows within a course reduces the amount of defected areas, where the course width is kept constant. Furthermore, the amount of defect areas significantly reduces by using a wide course, which has the effect of both increasing the deviation from the designed fiber path and reducing the number of manufacturable designs. The results show that a complete gap strategy shifts the defect-free Pareto front, obtained without considering the effect of defects, towards lower in-plane stiffness and buckling load; on the other hand, a complete overlap strategy shifts the Pareto front towards higher structural properties.
机译：可变刚度复合材料层压板可使用自动纤维铺放（AFP）技术制造。通过在更有利于承受载荷的方向上调整材料性能，可以提高结构性能。然而，在AFP制造过程中，不可避免地会形成缺陷，主要是间隙和重叠。缺陷区的范围通常由两套参数控制：设计参数；和制造参数。在这项工作中，我们研究了控制缺陷形成的参数如何影响多目标优化问题的最优解集，在该问题中，平面内刚度和屈曲载荷被同时最大化。发现增加路线中的丝束数量减少了路线宽度保持恒定的缺陷区域的数量。此外，通过使用宽的路线，缺陷区域的数量显着减少，这具有增加与设计光纤路径的偏差并减少可制造设计的数量的效果。结果表明，完整的间隙策略可将无缺陷的无缺陷Pareto前沿移向较低的面内刚度和屈曲载荷。另一方面，完全重叠的策略使帕累托阵线转向更高的结构性能。

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  • 来源
    《Composite Structures》 |2014年第1期|160-166|共7页
  • 作者

    Mahdi Arian Nik; Kazem Fayazbakhsh; Damiano Pasini; Larry Lessard;

  • 作者单位

    Department of Mechanical Engineering, McCill University, Macdonald Engineering Building, 817 Sherbrooke West, Montreal, QC, H3A 0C3, Canada;

    Department of Mechanical Engineering, McCill University, Macdonald Engineering Building, 817 Sherbrooke West, Montreal, QC, H3A 0C3, Canada;

    Department of Mechanical Engineering, McCill University, Macdonald Engineering Building, 817 Sherbrooke West, Montreal, QC, H3A 0C3, Canada;

    Department of Mechanical Engineering, McCill University, Macdonald Engineering Building, 817 Sherbrooke West, Montreal, QC, H3A 0C3, Canada;

  • 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

    Multi-objective optimization; Defects; Gap; Overlap; Automated Fiber Placement;

    机译：多目标优化;缺陷;间隙;交叠;自动光纤放置;

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