纤维金属层板铆接损伤机理与预测的研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (5): 25-32.

纤维金属层板铆接损伤机理与预测的研究

应少军¹, 李建伟², 平学成^3*, 程里朋³

1.中航工业昌河飞机工业(集团)有限责任公司,景德镇333000;
2.陆军航空兵军事代表局驻景德镇地区军事代表室,景德镇333000;
3.天津科技大学机械工程学院,天津300222

收稿日期:2017-11-24 出版日期:2018-05-20 发布日期:2018-05-20
通讯作者: 平学成(1975-),男,博士,教授,主要从事结构损伤、疲劳和断裂方面的研究,xuechengping@hotmail.com。
作者简介:应少军(1988-),男,硕士,工程师,主要从事结构抗疲劳工艺设计及试验方面的研究。
基金资助:
国家自然科学基金项目(51365013);江西省青年科学基金(重点)项目(20133ACB21002)

STUDY ON MECHANISM AND PREDICTIONOFRIVETED JOINTS OF FIBER METAL LAMINATES

YING Shao-jun¹, LI Jian-wei², PING Xue-cheng ^3*, CHENG Li-peng³

1.AVIC Changhe Aircraft Industry (Group) Co., Ltd., Jingdezhen 333000, China;
2.Army Aviation agent′s room in Jingdezhen area,Jingdezhen 333000, China;
3.School of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin 300222, China

Received:2017-11-24 Online:2018-05-20 Published:2018-05-20

摘要/Abstract

摘要： 纤维金属层板铆接损伤是连接件、被连接件以及铆钉等多个复杂结构的耦合损伤行为。为了预测纤维金属层板铆接损伤行为,采用Johnson-Cook失效准则预测金属层损伤,采用三维Hashin损伤准则预测复合材料层损伤,采用脱层失效理论预测层间开裂,理论预测模型的合理性通过了实验验证。通过损伤预测模型分别考察层板铺层数量、铆接预紧力、铝合金分数和结构几何对纤维金属层板铆接损伤行为及铆接刚度的影响,为FMLs铆接设计提供可行性建议。结果表明:铺层数量的增加加剧了层板自由端层间脱层剥离现象,从而降低了层板铆接强度;铝合金分数的增加能够提高层板的铆接强度,但铝合金分数大于50%时铆接强度和铆接比强度反而下降;预紧力的增大能够延缓纤维和基体的萌生,并且提升铆接刚度,使得纤维金属铆接承受更大载荷;随着横宽径比W/D和纵宽径比E/D的递增,铆接极限强度有所提高,当W/D≥3或E/D≥3时,铆接强度不再明显提高。

关键词: 纤维金属层板, 铆接, 损伤机理, 损伤准则

Abstract: Fiber metal laminates (FMLs) rivetdamage is a coupling damage behavior caused by a complex structure composed of connecting pieces, the connectedparts and the rivets.In order to predict rivet damage behavior of FMLs, Johnson-Cook failure criterionis used to predict Aluminum damage, three-dimensional Hashin damage criterion is used to evaluate the damage of fiber layers, and the cohesive model is applied to delamination prediction. And experimental comparative analysis was performed to verify the rationality of the coupling damagemodel. Effects of laminate layers, riveting pretension, aluminum alloy fraction and geometric coefficients on FMLs damage and stiffness of plate riveting were studied by this damage prediction model, and it provides the feasible advice for the design of FMLs rivet. The results show that laminates with more layers are much easier to debond at the bi-material interface, and the interlaminar delamination at free endsdirectly reduces the rivet strength. Rivet strength increases with increasing aluminum fraction, but it will decrease when the aluminum contentis greater than 50%. Pretensioncan delay the damage initiation at fiber and matrix, and enhance the stiffness of the rivet joint, which consequently endow it with the ability to withstand greater external load. The riveting ultimate strength increases with increasing weight-diameter ratio W/D, and end distance-diameter ratio E/D of fiber metal laminate riveting strength have different effects until W/D=3 and E/D=3. Further increase of W/D and E/D will not improve the rivet strength.

Key words: fiber metal laminates, rivet, damage mechanism, damage criterion

中图分类号:

TB332

应少军, 李建伟, 平学成, 程里朋. 纤维金属层板铆接损伤机理与预测的研究[J]. 玻璃钢/复合材料, 2018, 0(5): 25-32.

YING Shao-jun, LI Jian-wei, PING Xue-cheng , CHENG Li-peng. STUDY ON MECHANISM AND PREDICTIONOFRIVETED JOINTS OF FIBER METAL LAMINATES[J]. Fiber Reinforced Plastics/Composites, 2018, 0(5): 25-32.

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