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An analytical joint stiffness model for load transfer analysis in highly torqued multi-bolt composite joints with clearances

机译：具有间隙的高扭矩多螺栓复合材料接头的载荷传递分析的分析接头刚度模型

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摘要

An analytical tri-linear joint stiffness model accounting for the effect of bolt-hole clearances on the bearing chord stiffness is presented. A single-parameter iteration method is also proposed to solve the non-linear system of equations of the load transfer analysis, in which the recursive formulae are verified to be monotonic. To verify the present joint stiffness model, a series of single-lap, single-bolt joints with various bolt-hole clearances and bolt tightening torques were tested to empirically confirm the influence coefficients of the joint stiffness model. The load distributions in three single-lap, three-bolt joints with various clearances were also tested under finger-tight and highly torqued conditions. The load distributions in multi-bolt joints predicted by the presented joint stiffness model together with the single-parameter iteration method are in good agreement with the experimental outcomes, verifying the accuracy of the presented joint stiffness model and the feasibility of the single-parameter iteration method. In addition, the effects of the friction forces originated from the bolt-tightening torque and bolt-hole clearances on the load distribution in multi-bolt joints are presented. (C) 2015 Elsevier Ltd. All rights reserved.
机译：提出了一种解析的三线性接头刚度模型，该模型考虑了螺栓孔间隙对轴承弦刚度的影响。还提出了一种单参数迭代方法来求解非线性的负荷传递分析方程组，在该系统中，递归公式被证明是单调的。为了验证当前的接头刚度模型，测试了一系列具有不同螺栓孔间隙和螺栓拧紧扭矩的单圈，单螺栓接头，以凭经验确定接头刚度模型的影响系数。还在手指拧紧和高扭矩条件下测试了三个具有不同间隙的单圈三螺栓接头的载荷分布。提出的关节刚度模型与单参数迭代方法一起预测的多螺栓关节载荷分布与实验结果吻合良好，验证了所提出的关节刚度模型的准确性和单参数迭代的可行性。方法。此外，还提出了由螺栓拧紧扭矩和螺栓孔间隙引起的摩擦力对多螺栓接头载荷分布的影响。 （C）2015 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Composite Structures》 |2015年第11期|625-636|共12页
  • 作者

    Liu Fengrui; Zhang Jianyu; Zhao Libin; Xin An; Zhou Longwei;

  • 作者单位

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

    Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China;

  • 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

    Composites; Bolted joints; Load distribution; Clearance; Friction;

    机译：复合材料;螺栓连接;载荷分布;间隙;摩擦;

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