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首页> 外文期刊>Composite Structures >The use of a genetic algorithm to improve the postbuckling strength of stiffened composite panels susceptible to secondary instabilities
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The use of a genetic algorithm to improve the postbuckling strength of stiffened composite panels susceptible to secondary instabilities

机译：使用遗传算法提高易受二次不稳定性影响的加劲复合板的后屈曲强度

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摘要

The use of genetic algorithms (GAs) for structural optimisation is well established but little work has been reported on the inclusion of damage variables within an optimisation framework. This approach is particularly useful in the optimisation of composite structures which are prone to delamination damage. In this paper a challenging design problem is presented where the objective was to delay the catastrophic failure of a postbuckling secondary-bonded stiffened composite panel susceptible to secondary instabilities. It has been conjectured for some time that the sudden energy release associated with secondary instabilities may initiate structural failure, but this has proved difficult to observe experimentally. The optimisation methodology confirmed this indirectly by evolving a panel displaying a delayed secondary instability whilst meeting all other design requirements. This has important implication in the design of thin-skinned lightweight aerostructures which may exhibit this phenomenon.
机译：遗传算法（GAs）用于结构优化的方法已被广泛确立，但关于将损伤变量包含在优化框架中的报道很少。这种方法在优化容易分层破坏的复合结构时特别有用。在本文中，提出了一个具有挑战性的设计问题，其目的是延迟易受二次不稳定性影响的后屈曲二次粘结加劲复合板的灾难性破坏。人们猜测，与次级不稳定性相关的突然能量释放可能会引发结构破坏，但是一段时间以来，这已被证明很难通过实验观察。优化方法通过演变显示延迟的二次不稳定性同时满足所有其他设计要求的面板间接证实了这一点。这在可能表现出这种现象的薄皮轻型飞机结构的设计中具有重要意义。

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  • 来源
    《Composite Structures》 |2012年第3期|p.883-895|共13页
  • 作者

    B.G. Falzon; A. Faggiani;

  • 作者单位

    Department of Mechanical and Aerospace Engineering, Monash University, Building 31, Clayton Campus, Wellington Road, Clayton, VIC 3800, Australia;

    Department of Mechanical and Aerospace Engineering, Monash University, Building 31, Clayton Campus, Wellington Road, Clayton, VIC 3800, Australia;

  • 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

    buckling; postbuckling; delamination; finite element analysis; optimisation; genetic algorithm;

    机译：屈曲后屈曲分层有限元分析;优化;遗传算法;

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