Numerical Simulation and Experimental Verification of Pulling-riveting Process of New Non-plate Nuts

doi:10.3969/j.issn.1004-132X.2023.07.014

Abstract

Abstract: Due to the excellent characteristics in improving installation efficiency and reducing fatigue sources, a new type of 304 stainless steel non-plate nut was generalized in aviation field. Based on Johnson-Cook model, the finite element model was built to analyze the pulling-riveting progress. The loading-curve, plastic-flow, clamping force and interference amount, and the influences of interlayer state on riveting quality were analyzed. Meanwhile, the riveting installation tests of nuts were carried out. Results show that the finite element simulation model is in good agreement with the test loading curve, and the maximum load deviation from test is as 2.4%. When the compression stress of the nut is much higher than the yield stress of the material, the instability of the structure occurs, and the bulge structure is formed rapidly. The plastic flow mainly develops along the radial direction. The pulling-riveting process may provide a certain amount of clamping force and interference to interlayer. The clamping force reaches the maximum value after complete riveting, yet in a certain range, the slope of the riveting interlayer does not affect the clamping force. The maximum interference in the riveting processes is about 4.6%.

Key words: 304 stainless steel, non-plate nut, Johnson-Cook model, pulling-riveting

摘要： 一种新型304不锈钢无耳托板螺母的安装效率较高且能减少疲劳源，在航空领域应用广泛。基于Johnson-Cook模型建立了有限元模型，对该螺母拉铆成形过程载荷变化趋势、塑性流动、夹紧力与干涉量、夹层状态对铆接质量的影响分别进行分析，并开展了螺母的铆接安装试验。结果表明：有限元仿真模型与试验载荷曲线符合性较好，最大载荷误差为2.4%；螺母在受压应力远高于材料屈服应力时才发生结构失稳，迅速形成褶皱，塑性流动主要沿径向发展；拉铆过程可以给夹层提供一定量的夹紧力与干涉量，夹紧力在完成铆接后达到最大值，且在一定范围内夹层的斜度不影响夹紧力的大小，铆接过程最大干涉量为4.6%左右。

关键词: 304不锈钢, 无耳托板螺母, Johnson-Cook模型, 拉铆

CLC Number:

V229

WANG Shoucai, SUN Ang, LIU Rugang. Numerical Simulation and Experimental Verification of Pulling-riveting Process of New Non-plate Nuts[J]. China Mechanical Engineering, 2023, 34(07): 875-881.

王守财, 孙昂, 刘如刚. 新型无耳托板螺母拉铆过程数值仿真与试验验证[J]. 中国机械工程, 2023, 34(07): 875-881.

References

［1］JOHNSON G R, COOK W H. A Constitutive Modeland Data for Metals Subjected to Large Strains, High Strain Rates and High Temperatures［J］. Engineering Fracture Mechanics, 1983, 21:541-548.
［2］刘秀, 金霞, 楼航飞，等. 304不锈钢箔材在不同应变速率下的拉伸性能研究［J］. 材料科学与工艺, 2019, 27(5)：59-65.
LIU Xiu, JIN Xia, LOU Hangfei, et al. Studies on the Tensile Properties of 304 Stainless Steel Foil at Different Strain Rates［J］.Materials Science and Technology, 2019,27(5):59-65.
［3］张帅, 赵琪, 王华. 考虑应变率差异的铆接仿真建模和实验研究［J］. 机械设计与制造, 2018(9):197-200.
ZHANG Shuai, ZHAO Qi, WANG Hua. Study on Simulation Modeling and Experiment of Riveting Considering Strain Rate Difference［J］. Machinery Design & Manufacture, 2018(9):197-200.
［4］熊江茗, 周杰, 王时龙,等. 基于Johnson-Cook模型的不锈钢管剪切数值模拟［J］. 中国机械工程, 2020, 31(15):1877-1884.
XIONG Jiangming, ZHOU Jie, WANG Shilong, et al. Numerical Simulation of Stainless Steel Tube Shearing Based on Johnson-Cook Model［J］. China Mechanical Engineering, 2020, 31(15):1877-1884.
［5］LEE S, BARTHELAT F, HUTCHINSON J W, et al. Dynamic Failure of Metallic Pyramidal Truss Core Materials —Experiments and Modeling［J］. International Journal of Plasticity, 2006, 22(11):2118-2145.
［6］LAAKSO S, AGMELL M, STAHL J E. The Mystery of Missing Feed Force — the Effect of Friction Models, Flank Wear and Ploughing on Feed Force in Metal Cutting Simulations［J］. Journal of Manufacturing Processes, 2018, 33:268-277.
［7］邓云飞, 张永, 张伟岐,等. 断裂准则对TC4钛合金板抗卵形头弹冲击的影响［J］. 中国机械工程, 2019, 30(19):2378-2384.
DENG Yunfei, ZHANG Yong, ZHANG Weiqi, et al. Effects of Fracture Criterionon TC４ Titanium Alloy Plates against Impacts of Ogival-nosed Projectiles［J］. China Mechanical Engineering, 2019, 30(19):2378-2384.
［8］李翀, 鄂大辛, 佘彩凤. 5A03铝合金管轴向压缩失稳形式及影响因素分析［J］. 精密成形工程, 2014, 6(2):36-40.
LI Chong, E Daxin, SHE Caifeng, Analysis on Instability Forms of 5A03 Aluminum Alloy Tube under Axial Compression and Its Influencing Factors［J］. Journal of Netshape Forming Engineering, 2014, 6(2):36-40.
［9］郭英涛, 任文敏. 关于限制失稳的研究进展［J］. 力学进展, 2004, 34(1):41-52.
GUO Yingtao, REN Wenmin. Some Advances in Confined Buckling［J］. Advances in Mechanics, 2004, 34(1):41-52.
［10］GUILLOWS R, LU G, GRZEBIETA R H. Quasi-static Axial Compression of Thin-walled Circular Aluminium Tubes［J］. International Journal of Mechanical Sciences, 2001, 43(9):2103-2123.
［11］ALVES L M, SILVA C M A , MARTINS P A F, et al. End-to-end Joining of Tubes by Plastic Instability［J］. Journal of Materials Processing Technology, 2014, 214(9):1954-1961.
［12］余海燕, 何泽珍. 基于塑性失稳的圆管对称压缩研究［J］. 锻压技术, 2016, 41(9):58-63.
YU Haiyan, HE Zezhen. Symmetry Compression Based on Plastic Instability of Circular Tubes［J］. Forging & Stamping Technology, 2016, 41(9):58-63.
［13］陈惠发,萨里普 A F. 弹性与塑性力学［M］. 北京:中国建筑工业出版社, 2005.
CHEN W F, SALEEB A F. Elasticity and Plasticity［M］. Beijing：China Architecture & Building Press, 2005.
［14］李传强, 许道奎, 韩恩厚. 镁合金塑性变形过程中锯齿屈服现象的研究进展［J］. 中国材料进展, 2016, 35(11):809-818.
LI Chuanqiang, XU Daokui, HAN Enhou. Research Progress on the Plastic Instability Phenomenon of Magnesium Alloys［J］. Materials China, 2016, 35(11):809-818.
［15］左杨杰, 曹增强, 杨柳,等. 基于对称加载的均匀干涉配合铆接方法［J］. 航空学报, 2016,37(3)：1049-1059.
ZUO Yangjie, CAO Zengqiang, YANG Liu, et al. Interference-fit Evenness Riveting Method Based on Symmetrical Loading［J］. Acta Aeronautica et Astronautica Sinica, 2016,37(3):1049-1059.
［16］程晖, 樊新田, 徐冠华,等. 航空复合材料结构精密干涉连接技术综述［J］. 航空学报, 2021, 42(10):524876.
CHENG Hui, FAN Xintian, XU Guanhua, et al. State of the Art of Precise Interference-fit Techno-logy for Composite Structure in Aircraft［J］. Acta Aeronautica et Astronautica Sinica, 2021, 42(10):524876.
［17］魏景超, 矫桂琼, 闫照明,等. 单面螺纹抽钉干涉配合复合材料连接件挤压强度研究［J］. 航空学报, 2013, 34(7)：1627-1635.
WEI Jingchao, JIAO Guiqiong, YAN Zhaoming, et al. Bearing Strength of Composite Joints Interference-fitted with Blind Bolts［J］. Acta Aeronautica et Astronautica Sinica, 2013，34(7)：1627-1635.

[1]	XIONG Jiangming, ZHOU Jie, WANG Shilong, YANG Bo, WANG Sibao, DONG Jianpeng. Numerical Simulation of Stainless Steel Tube Shearing Based on Johnson-Cook Model [J]. China Mechanical Engineering, 2020, 31(15): 1877-1884.
[2]	HU Yaguang, WANG Xuanguo, DUAN Aiqin, MA Xuyi. Influences of Welding Parameters on Temperature Field Characteristics during Laser Welding of 304 Stainless Steels [J]. China Mechanical Engineering, 2017, 28(11): 1367-1374.
[3]	MENG Qiang-Dang-1, LI He-Zong-2, DONG Xiang-Fu-1, BANG Fang-1, WANG Qian-1. Investigation of Size Effects of 304 Stainless Steel Foils in Microforming Processes [J]. China Mechanical Engineering, 2013, 24(02): 280-283.
[4]	HUANG Yun, YANG Chun-Jiang, HUANG Zhi. Experimental Research on Abrasive Belt Grinding for 304 Stainless Steel [J]. China Mechanical Engineering, 2011, 22(3): 291-295.
[5]	Li Lin;Xie Lijing;Wang Xibin;Zhang Zhijing. Constitutive Model of 2Cr13 for Finite Element Analysis of Chip Formation Process [J]. J4, 2009, 20(20): 0-2398.