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首页> 外文期刊>Composite Structures >Fracture resistance of 3D printed adhesively bonded DCB composite specimens using structured interfaces: Experimental and theoretical study
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Fracture resistance of 3D printed adhesively bonded DCB composite specimens using structured interfaces: Experimental and theoretical study

机译：使用结构化界面的3D打印胶粘DCB复合材料样品的耐断裂性：实验和理论研究

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摘要

The use of adhesive joints is widespread in lightweight composite structures, whereby interfaces between adherents play a crucial role in terms of the fracture resistance of the component. The appearance of recent Additive Layer Manufacturing (ALM or 3D printing) techniques opens a new paradigm regarding the design of interfaces, allowing the reproduction of nature-inspired geometric definitions to be accomplished. In this paper, the mechanical performance of double cantilever beam (DCB) specimens with trapezoidal patterned interfaces using ALM in long-fibre composites are investigated from an experimental point of view. Special attention is devoted in this study to the analysis of the influence of the aspect ratio A/lambda (A = amplitude, lambda = wavelength) of the structured interface on the fracture toughness of such specimens. The experimental data reveal a notable increase of the critical energy release rates in comparison with flat interface profiles. A map of different trapezoidal interface profiles, whose corresponding fracture properties are satisfactorily predicted by means of a novel theoretical model within a wide range of interface definitions is presented. The results obtained demonstrate the potential benefits arising from the production of bonded joints with patterned trapezoidal interfaces, which can lead to tougher and promising performances in service.
机译：粘合剂接头的使用在轻型复合结构中非常普遍，因此，粘合剂之间的界面在组件的抗断裂性方面起着至关重要的作用。最近的添加层制造（ALM或3D打印）技术的出现开启了有关界面设计的新范例，从而可以实现自然灵感的几何定义的再现。本文从实验的角度研究了使用ALM在长纤维复合材料中具有梯形图案界面的双悬臂梁（DCB）试样的力学性能。在这项研究中，要特别注意结构化界面的长宽比A /λ（A =振幅，λ=波长）对这种样品的断裂韧性的影响的分析。实验数据表明，与平坦的界面轮廓相比，临界能量释放速率显着提高。给出了不同梯形界面轮廓的图，通过新颖的理论模型在各种界面定义范围内可以令人满意地预测其相应的断裂特性。所获得的结果表明，生产带图案梯形界面的粘结接头具有潜在的好处，可导致在使用中获得更坚硬和有希望的性能。

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  • 来源
    《Composite Structures》 |2018年第3期|173-184|共12页
  • 作者

    Garcia-Guzman L.; Tavara L.; Reinoso J.; Justo J.; Paris F.;

  • 作者单位

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

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

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

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

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

  • 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

    Structured interfaces; Interlaminar damage; Fracture toughness; ALM;

    机译：结构化界面;层间损伤;断裂韧性;ALM;

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