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首页> 外文期刊>Composites Science and Technology >An experimental study of the translaminar fracture toughnesses in composites for different crack growth directions, parallel and transverse to the fiber direction
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An experimental study of the translaminar fracture toughnesses in composites for different crack growth directions, parallel and transverse to the fiber direction

机译：复合材料在不同裂纹扩展方向，平行和横向于纤维方向的跨层断裂韧性的实验研究

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摘要

This work studies how the direction of crack propagation affects the translaminar fracture toughness in composites. In particular, this work focuses on propagation mode-I toughness. The two extreme cases are analyzed: crack propagating in the direction either parallel or perpendicular to the fibers (always without breaking fibers). To evaluate the effect of the direction of crack propagation, an experimental campaign was carried out by two new cracked Three Point Bending (TPB) specimens specially developed for this purpose. Using these specimens, the fracture toughness was measured for different directions of the crack propagation. In addition, a set of standard Double Cantilever Beam (DCB) specimens (corresponding to the longitudinal interlaminar fracture toughness) were tested for the sake of comparison. The results show that the translaminar fracture toughness is higher when the crack grows parallel to the fiber direction than when it grows perpendicular. In both cases, the fracture toughness is higher than that measured for the longitudinal interlaminar growth using DCB specimens. The physical reasons for these experimental results are discussed.
机译：这项工作研究裂纹扩展的方向如何影响复合材料的层间断裂韧性。特别地，这项工作集中于传播模式I韧性。分析了两种极端情况：裂纹在平行于或垂直于纤维的方向上传播（始终不破坏纤维）。为了评估裂纹扩展方向的影响，为此专门开发了两个新的裂纹三点弯曲（TPB）标本进行了实验。使用这些样品，在裂纹扩展的不同方向上测量了断裂韧性。此外，为了进行比较，还测试了一组标准的双悬臂梁（DCB）标本（对应于纵向层间断裂韧性）。结果表明，当裂纹平行于纤维方向生长时，其层间断裂韧性高于垂直生长时的断裂韧性。在这两种情况下，断裂韧性均高于使用DCB样品测量的纵向层间生长的韧性。讨论了这些实验结果的物理原因。

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  • 来源
    《Composites Science and Technology》 |2019年第8期|107679.1-107679.8|共8页
  • 作者

    Cepero F.; Garcia I. G.; Justo J.; Mantic V.; Paris F.;

  • 作者单位

    Univ Seville Escuela Tecn Super Ingn Grp Elasticidad & Resistencia Mat Camino Descubrimienos S-N Seville 41092 Spain|Univ Sheffield Dept Mech Engn Ind Doctorate Ctr Machining Sci Comp Aided Aerosp & Mech Engn CA2M Res Grp Sir Frederick Mappin Bldg Mappin St Sheffield S1 3JD S Yorkshire England;

    Univ Seville Escuela Tecn Super Ingn Grp Elasticidad & Resistencia Mat Camino Descubrimienos S-N Seville 41092 Spain;

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  • 正文语种 eng
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  • 关键词

    Fracture toughness; Transverse crack; Experiment; Composites;

    机译：断裂韧性;横向裂纹;实验;复合材料;

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