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Discrete ply model of circular pull-through test of fasteners in laminates

机译：层压板中紧固件的圆形穿通试验的离散层模型

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摘要

In aeronautical structures, assemblies with thin laminates are becoming increasingly usual, especially for fuselage design. In these structures, out-of-plane loads can appear in bolted joints and can lead to progressive punching of the fastener's head in the laminate resulting, in some cases, in a failure mode called pull-through [1]. This complex phenomenon, which occurs in assemblies, was studied firstly by using a simplified "circular" pull-through test method. Qualitative micrographic examinations showed damage very similar to that observed in impacted specimens. The research presented here extends the Discrete Ply Model Method (DPM) developed by Bouvet et al. [2] to this case. The finite elements model is based on a particular mesh taking ply orientations into account. Cohesive elements are placed at the interfaces between solid elements to represent matrix cracks and delamination, thus allowing the natural coupling between these two damage modes to be represented. The model shows good correlation with test results, in terms of load/displacement curve, and correct prediction of the damage map until failure, including the splitting phenomenon.
机译：在航空结构中，具有薄层压板的组件正变得越来越普遍，尤其是对于机身设计而言。在这些结构中，平面外载荷会出现在螺栓连接中，并可能导致紧固件的头部逐渐冲孔到层压板中，在某些情况下会导致称为“穿通”的失效模式。首先，使用简化的“圆形”穿通测试方法研究了装配中出现的这种复杂现象。定性显微照相检查显示的损伤与在冲击试样中观察到的损伤非常相似。这里提出的研究扩展了Bouvet等人开发的离散层模型方法（DPM）。 [2]这种情况。有限元模型基于考虑了层定向的特定网格。粘结元素放置在实体元素之间的界面处，以表示基体裂纹和分层，因此可以表示这两种损坏模式之间的自然耦合。该模型在载荷/位移曲线方面显示出与测试结果的良好相关性，并正确预测了直至损坏的破坏图，包括断裂现象。

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  • 来源
    《Composite Structures》 |2012年第10期|p.3082-3091|共10页
  • 作者

    Louis Adam; Christophe Bouvet; Bruno Castanie; Alain Daidie; Elodie Bonhomme;

  • 作者单位

    Airbus, 316 Route de Bayonne, 31060 Toulouse Cedex 9, France,Universite de Toulouse, UPS, Mines d' AM, ISAE, ICA (Institut Clement Ader), 1NSA, 135, Avenue de Rangueil, 31077 Toulouse Cedex, France;

    Universite de Toulouse, UPS, Mines d' AM, ISAE, ICA (Institut Clement Ader), 1NSA, 135, Avenue de Rangueil, 31077 Toulouse Cedex, France;

    Universite de Toulouse, UPS, Mines d' AM, ISAE, ICA (Institut Clement Ader), 1NSA, 135, Avenue de Rangueil, 31077 Toulouse Cedex, France;

    Universite de Toulouse, UPS, Mines d' AM, ISAE, ICA (Institut Clement Ader), 1NSA, 135, Avenue de Rangueil, 31077 Toulouse Cedex, France;

    Airbus, 316 Route de Bayonne, 31060 Toulouse Cedex 9, 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

    composite joints; pull-through; cohesive element; experiment; fe modelling;

    机译：复合接头穿通内聚元素实验;fe建模;

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