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Effect of the loading rate on ultimate strength of composites. Application: Pressure vessel slow burst test

机译:加载速率对复合材料极限强度的影响。应用:压力容器缓爆试验

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摘要

The strength of unidirectional elastic fibre composites is shown to depend on the loading rate as the vis-coelastic nature of the matrix results in a fall in breaking load as the rate is reduced. The simulation of the accumulation of fibre breaks leading to failure, takes into account all physical phenomena involved fibre failure, including the stochastic nature of fibre strength, stress transfer through the matrix between reinforcements, interfacial debonding and the viscoelastic nature of the matrix. The kinetics of composite failure are seen to involve the initial formation of random fibre breaks which at higher loads coalesce into clusters of broken fibres. The rate at which this occurs depends on the viscoelastic properties of the matrix. These results have been shown to closely mirror the behaviour of carbon fibre composite pressure vessels.
机译:显示出单向弹性纤维复合材料的强度取决于加载速率,因为基体的粘弹性特性导致降低断裂载荷时断裂载荷下降。模拟导致断裂的纤维断裂的积累,考虑到了所有与纤维断裂有关的物理现象,包括纤维强度的随机性,在增强材料之间通过基体的应力传递,界面脱粘以及基体的粘弹性。复合材料破坏的动力学被认为涉及随机纤维断裂的初始形成,该断裂在较高的载荷下会聚集成断裂的纤维簇。发生的速率取决于基体的粘弹性。这些结果已显示出与碳纤维复合材料压力容器的行为密切相关。

著录项

  • 来源
    《Composite Structures》 |2013年第10期|144-153|共10页
  • 作者单位

    Centre des Materiaux, Mines Paristech, CNRS UMR 7633, BP 87, 91003 Evry cedex, France;

    Centre des Materiaux, Mines Paristech, CNRS UMR 7633, BP 87, 91003 Evry cedex, France;

    BAM, Federal Institute for Materials Research and Testing, Unter den Eichen 44-46, 12203 Berlin, Germany;

    Centre des Materiaux, Mines Paristech, CNRS UMR 7633, BP 87, 91003 Evry cedex, France,Universite de Bourgogne, Mirande, Dpt. IEM, BP 47870, 21078 Dijon, 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

    Fibre break; Pressure vessels; Speed effect; Micromechanics;

    机译:纤维断裂;压力容器;速度效果;微力学;

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