CFRP/Al抽芯铆钉单剪干涉配合的渐进损伤数值模拟研究

王兵兵; 周钊元; 金万军; 何超; 唐正强

doi:10.13801/j.cnki.fhclxb.20231025.001

CFRP/Al抽芯铆钉单剪干涉配合的渐进损伤数值模拟研究

doi: 10.13801/j.cnki.fhclxb.20231025.001

1.
贵州大学　机械工程学院，贵阳 550025
2.
中国航空工业标准件制造有限责任公司，贵阳 550014

基金项目: 贵州省科技计划项目(黔科合支撑[2021]一般281)

详细信息

通讯作者:
唐正强，博士，教授，研究方向为智能装备、摩擦磨损、防腐耐磨涂层、功能表面涂层　E-mail: zhengqiagntang@126.com

中图分类号: TH131.1；TB333
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- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-01
- 修回日期: 2023-10-11
- 录用日期: 2023-10-20
- 网络出版日期: 2023-10-25
- 刊出日期: 2024-06-15

Numerical simulation of progressive damage of single-lap CFRP/Al connected by blind rivet under interference condition

1.
School of Mechanical Engineering, Guizhou University, Guiyang 550025, China
2.
AVIC Standard Parts Manufacturing CO., LTD., Guiyang 550014, China

Funds: Guizhou Science and Technology Plan Project (Guizhou Science and Technology Support [2021] General 281)

摘要

摘要: 干涉配合在改善抽芯铆钉连接复合材料的力学性能方面具有较强优势。然而，干涉配合下抽芯铆钉的安装往往会导致碳纤维增强树脂复合材料(CFRP)层压板的损坏，削弱铆接接头的力学性能。本文采用了完整的抽芯铆钉模型，基于连续损伤力学、扩展的三维破坏准则和应变率效应，通过有限元和Abaqus二次开发相结合的方法，研究了CFRP/Al单剪铆接中抽芯铆钉与连接孔的干涉量和铆钉的安装速度对复合材料损伤的影响。从模拟结果来看受安装速度的影响显著，安装阻力呈现出两个典型的阶段，分别由铝合金板、CFRP板与抽芯铆钉的摩擦产生造成。抽芯铆钉安装在干涉配合情况下，安装速度越大对于降低安装阻力十分有利。然而，过高的安装速度会导致孔壁的损伤增加，尤其在高干涉量下更为明显。抽芯铆钉铆接接头的失效模式以CFRP损伤为主，并受干涉尺寸的影响显著。
- CFRP /
- 抽芯铆钉 /
- 渐进损伤 /
- 有限元分析 /
- 干涉配合
Abstract: Interference fit has advantages in improving the mechanical performance of blind rivet in connections for composite materials. However, the installation of blind rivets under interference fit leads to the damage of carbon fiber reinforced plastic (CFRP) laminates, weakening the mechanical performance of the joints. In this paper, based on continuous damage mechanics, extended three-dimensional failure criteria and strain rate effect, a complete blind rivet model, which combining finite element method and secondary development of Abaqus was developed to study the effect of interference and installation speed on the damage of composite materials. From the simulation results, the installation resistance force exhibits two typical stages, which are generated by the friction between the aluminum alloy and the CFRP laminate with the blind rivet, respectively. Under interference fit conditions, a higher installation speed is highly advantageous in reducing installation resistance. However, excessive installation speed can lead to increased damage to the hole walls, which is especially noticeable in cases of high interference fit. The failure mode of the joint is mainly caused by CFRP damage and is significantly influenced by the interference size.
- CFRP /
- blind rivet /
- progressive damage /
- finite element analysis /
- interference fit

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图 1 力学性能3种退化方式

Figure 1. Three degradation modes of mechanical properties

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图 2 碳纤维增强树脂复合材料(CFRP)铆接模拟实施流程

Figure 2. simulation implementation process of carbon fiber reinforced plastics (CFRP) riveting

σ—; C—; ε—

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图 3 CFRP/Al单钉单剪铆接几何参数

Figure 3. Geometrical parameters of CFRP/AL single nail single shear riveting

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图 4 网格划分及边界条件

Figure 4. Grid division and boundary conditions

U_x, U_y, U_z—

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图 5 抽芯铆钉的铆接过程

Figure 5. Riveting process of the blind rivet

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图 6 CFRP/Al单钉单剪铆接在干涉量I₁、I₂和I₃下的位移-载荷曲线

Figure 6. Displacement-load curves of CFRP/Al single-pin single-shear riveting with interference quantities I₁, I₂ and I₃

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图 7 过盈配合接头的载荷-位移曲线的典型模型

Figure 7. Typical model of load-displacement curve of interference fit joint

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图 8 干涉量I₁、I₂和I₃下1 m/s、5 m/s和10 m/s所对应的CFRP的纤维拉伸损伤、基体拉伸损伤、层合板拉伸损伤和层合板压缩损伤

Figure 8. Fiber tensile damage, matrix tensile damage, laminate tensile damage and laminate compression damage of CFRP corresponding to 1 m/s, 5 m/s and 10 m/s under interference quantities I₁, I₂ and I₃

SDV1—Fiber tensile damage; SDV3—Matrix tensile damage; SDV5—Tensile delamination damage; SDV6—Compressive delamination damage

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图 9 干涉量I₁、I₂、I₃下的纤维拉伸损伤、基体拉伸损伤、拉伸分层损伤和压缩分层损伤

Figure 9. Fiber tensile damage, matrix tensile damage, tensile delamination damage and compressive delamination damage under interference quantities I₁, I₂ and I₃

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图 10 CFRP/Al抽芯铆钉锁定的应力云图

Figure 10. Stress nebulogram of a locked CFRP/Al rivet

S—

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图 11 CFRP/Al 抽芯铆钉锁紧后CFRP最后一层的损伤

Figure 11. Damage of the last layer of CFRP after the CFRP/Al core-pulling rivet is locked

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表 1 T700/M21复合材料属性参数

Table 1. Property parameters of T700/M21 composites

E₁₁/GPa	E₂₂/GPa	E₃₃/GPa	G₁₂/GPa	G₁₃/GPa	G₂₃/GPa	v₁₂/GPa	v₁₃/GPa	v₂₃/GPa
117	7.7	7.7	4.8	4.8	2.8	0.34	0.34	0.4
Notes: E₁₁, E₂₂, E_33—; G₁₂, G₁₃, G₂₃—; v₁₂, v₁₃, v₂₃—.

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表 2 T700/M21复合材料层间强度

Table 2. Interlaminar strength of T700/M21 composites

X_T/GPa	X_C/GPa	Y_T/GPa	Y_C/GPa	Z_T/GPa	Z_C/GPa	S₁₂/GPa	S₁₃/GPa	S₂₃/GPa
2200	1700	50	300	50	300	95	95	95
Notes: X_T, X_C—; Y_T, Y_C—; Z_T, Z_C—; S₁₂, S₁₃, S_23—.

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表 3 抽芯铆钉各零件和铝合金的属性参数

Table 3. Property parameters of each part of blind rivet and aluminum alloy

Name	Type	Young's modulus/GPa	Poisson's ratio	Density/(g·cm⁻³)
Sleeve	CPTi	100	0.34	4.51
Stem	Ti3Al8V6Cr4Mo4Zr	107.8	0.32	4.82
Lock collar	A286	2.01	0.305	7.49
Shifting anvil	45A	206	0.269	7.85
Al alloy	Al	72	0.33	2.70

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表 4 CFRP/Al抽芯铆钉相对干涉量大小

Table 4. Relative interference magnitude of the CFRP/Al blind rivet

Number	Interference amount/%	Sleeve diameter/mm	Aperture/mm
$ I $₀	0	4.80	4.80
$ I $₁	0.42	4.80	4.78
$ I $₂	0.84	4.80	4.76
$ I $₃	1.30	4.80	4.74

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