间隙补偿对单螺栓连接层合板轴向刚度的影响研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (11): 59-64.

间隙补偿对单螺栓连接层合板轴向刚度的影响研究

蒋麒麟^1,2, 安鲁陵^1*, 云一珅¹, 高国强¹

1.南京航空航天大学机电学院,南京210016;
2.南京工程学院机械学院,南京211167;
3.上海飞机制造有限公司航空制造技术研究所,上海200436

收稿日期:2016-06-20 出版日期:2016-11-30 发布日期:2016-11-30
通讯作者: 安鲁陵(1962-),男,博士,教授,主要从事飞机复合材料构件装配方面的研究,anllme@nuaa.edu.cn。
作者简介:蒋麒麟(1976-),男,博士生,讲师,主要从事飞机复合材料构件装配方面的研究。
基金资助:
国家商用飞机制造工程技术研究中心创新基金(SAMC13-JS-15-021);上海飞机制造有限公司委托关键技术攻关项目(JS-20130913/005);南京工程学院机械工程学院重点学科开放课题(JXKJ201501)

EFFECT OF GAP COMPENSATION ON AXIAL STIFFNESS IN SINGLE BOLT FASTENING COMPOSITE LAMINATES

JIANG Qi-lin^1,2, AN Lu-ling^1*, YUN Yi-shen¹, GAO Guo-qiang¹

1.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016,China;
2.School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
3.Institute of Aeronautical Technology, Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China

Received:2016-06-20 Online:2016-11-30 Published:2016-11-30

摘要/Abstract

摘要： 在螺栓连接装配过程中,被连接件的轴向刚度会直接影响夹紧力的形成,以及不同工况下夹紧力的保持与衰退,对装配结构的可靠性与稳定性影响显著。由于受复合材料层合板本身的材料性质和成型工艺方法的限制,在层合板构件螺栓连接中,较小的装配间隙难以避免,飞机装配中一般采用液体垫片对层合板构件之间较小的装配间隙进行补偿。首先,以复合材料层合板单螺栓连接为研究对象,考虑强迫装配(未实施间隙补偿工艺)与采用液体垫片实施间隙补偿两种情况,利用ABAQUS建立有限元模型;其次,设计了层合板单螺栓连接结合面有效接触尺寸测量实验,有限元模型计算结果与实验测量数据的吻合度较好;最后,根据建立的模型,研究了间隙补偿及不同液体垫片参数下,层合板轴向刚度的变化。有限元分析结果表明:相对于强迫装配,随着间隙的增大,液体垫片会愈加显著地提高层合板的轴向刚度;在工艺规范的使用厚度范围内,垫片厚度的增加对层合板轴向刚度的提高具有更加明显的促进作用,同时,使用高弹性模量的液体垫片更有益于提高层合板的轴向刚度;建议0.05 mm及以上的装配间隙必须实施间隙补偿工艺。

关键词: 复合材料层合板, 螺栓连接, 液体垫片, 间隙补偿, 轴向刚度

Abstract: The axial stiffness of the part that be connected will directly affect the formation of the clamping force, the maintain and recession of clamping force in the process of bolt fastening under different working conditions. As a result , a significant influence will appear on the reliability and stability of the assembly structure. On account of the material property of composite laminates itself and the limitation of the molding process method, small assembly gaps are difficult to avoid in the composite laminates bolted fastening. Liquid shim is commonly be used to compensate for the small gaps between the laminates parts in aircraft assembly. First, with the single bolt fastening of composite laminates as the object, the finite element model is built by using ABAQUS software. And two cases are considered in the process, that is, with a liquid shim to compensate for the gap and without it. Secondly, the experiment is designed: the effective contact surface dimension of the bolt fastening. The results of the model are in good agreement with the experimental data. Under different liquid shim compensation parameters, the effective contact area of the bolt fastening is studied based on the model. Research results show that with the increase of the gap′s thickness, liquid shim will significantly improve the axial stiffness of laminates relative to the forced assembly. In the thickness range of process specification, the increase of the gap′s thickness plays more obvious role in promoting the laminates axial stiffness. At the same time, the use of high elastic modulus of liquid shim is more beneficial to improve the axial stiffness of laminates. It is suggested that gap compensation process must be carried out when the thickness of gap reached 0.05 mm in aircraft assembly.

Key words: composite laminates, bolt fastening, liquid shim, gap compensation, axial stiffness

中图分类号:

TB332

蒋麒麟, 安鲁陵, 云一珅, 高国强. 间隙补偿对单螺栓连接层合板轴向刚度的影响研究[J]. 玻璃钢/复合材料, 2016, 0(11): 59-64.

JIANG Qi-lin, AN Lu-ling, YUN Yi-shen, GAO Guo-qiang. EFFECT OF GAP COMPENSATION ON AXIAL STIFFNESS IN SINGLE BOLT FASTENING COMPOSITE LAMINATES[J]. Fiber Reinforced Plastics/Composites, 2016, 0(11): 59-64.

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