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A new test methodology based on structural resonance for mode I fatigue delamination growth in an unidirectional composite

机译：基于结构共振的单向复合材料中模式I疲劳分层生长的新测试方法

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摘要

A specific device has been set up to test by vibration resonance the mode I fatigue delamination growth onset of composite laminates. This test system, based on the DCB test specimen, is a mass-spring-specimen dynamic system designed to resonate. The defined operating conditions allow performing delamination propagation tests under imposed load and stopping the test under reproducible conditions, identical to the ones recommended in the ASTM-D6115 standard. This system allows fatigue tests to be driven up to 100 Hz, reducing the time taken by a factor of ten without detrimental heat being generated in the material. The effect of frequency on the fatigue delamination growth on mode I has been investigated through a comparison with standard tests performed at 10 Hz. A decrease in resistance to the propagation of delamination is observed with the increase in frequency for the composite studied. This frequency effect seems to be a strain rate effect and was taken in consideration by using dynamical critical energy restitution rate for the G-N curve plotting.
机译：已经建立了一种特定的装置来通过振动共振来测试复合材料层压板的I型疲劳分层生长开始。该测试系统基于DCB测试样本，是一种设计成能产生共振的质量弹簧样本动态系统。定义的操作条件允许在施加的负载下执行分层传播测试，并在可重复的条件下停止测试，该条件与ASTM-D6115标准中推荐的条件相同。该系统允许将疲劳测试驱动至100 Hz，从而将时间减少了十分之一，而不会在材料中产生有害的热量。通过与在10 Hz下执行的标准测试进行比较，研究了频率对I型疲劳分层生长的影响。对于所研究的复合材料，随着频率的增加，观察到对分层传播的阻力降低。该频率效应似乎是应变速率效应，并且通过将动态临界能量恢复速率用于G-N曲线图来考虑。

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  • 来源
    《Composite Structures》 |2013年第3期|353-362|共10页
  • 作者

    I. Maillet; L. Michel; G. Rico; M. Fressinet; Y. Gourinat;

  • 作者单位

    University de Toulouse, 1NSA, UPS, Mines Albi, ISAE, ICA (Institut Clement Ader), 10 av. Edouard Belin, BP 54032, 31055 Toulouse, France;

    University de Toulouse, 1NSA, UPS, Mines Albi, ISAE, ICA (Institut Clement Ader), 10 av. Edouard Belin, BP 54032, 31055 Toulouse, France;

    DGA Techniques Aeronautiques, 47 me St. Jean, BP 93123, 31131 Balma, France;

    DGA Techniques Aeronautiques, 47 me St. Jean, BP 93123, 31131 Balma, France;

    University de Toulouse, 1NSA, UPS, Mines Albi, ISAE, ICA (Institut Clement Ader), 10 av. Edouard Belin, BP 54032, 31055 Toulouse, 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

    fiber reinforced polymer matrix; delamination resistance; mode i loading; resonance test development; vibratory fatigue; frequency effect;

    机译：纤维增强聚合物基体耐分层性我正在加载模式共振测试开发;振动疲劳频率效应;

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