Fatigue study on bolt connection of carbon fiber reinforced plastics at low temperature

doi:10.19936/j.cnki.2096-8000.20210728.003

Abstract

Abstract: The tensile fatigue of bolted connections at low temperature is studied, mainly aiming to solve the tension-tension fatigue problems of Carbon Fiber Reinforced Plastics (CFRP) and 2024Al. Firstly the tensile experiments under different environment were performed to get the maximum static load. Then the damage process of the heterogeneous material laminated plate connected joints under the different temperature was explored through the static load damage curve. Then the delamination and tear degree of the composite laminated plates were compared by the observation of different temperature tensile failure phenomenon. Moreover, based on the above analysis, the influence of the low temperature environment on the bolt connection fatigue of heterogeneous material was explored. Then the different temperature grouping of laminated plates joint in their respective 85%, 80% and 75% respectively were chosen to undergo room temperature and low temperature fatigue experiments under the maximum static load condition. The experimental results were used to fit S-N curve of normal temperature and low temperature. The results demonstrated that the tensile failure strength of the lower bonding plate joints in low temperature environment was stronger than that in normal temperature environment under the same experimental conditions. Fatigue curve analysis showed that the laminated plates under low temperature environment offered stronger fatigue loading ability.

Key words: CFRP, low temperature, bolted connections, tension-tension fatigue

CLC Number:

TB332

LI Hua, ZHENG Hui, WANG Gong-dong, LIU Yue, YAO Song-yang. Fatigue study on bolt connection of carbon fiber reinforced plastics at low temperature[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(7): 17-21.

References

[1] 葛恩德. 碳纤维复合材料及其叠层连接结构孔挤压强化技术研究[D]. 南京: 南京航空航天大学, 2015.
[2] 张昕. 复合材料干涉配合连接有限元分析[D]. 西安: 西安电子科技大学, 2011.
[3] 沈媛臻, 肖毅. 微动损伤对复合材料螺栓连接预紧力松弛的影响[J]. 复合材料学报, 2019, 36(2): 400-409.
[4] LI W, CAI H, LI C, et al. Micro-mechanics of failure for fatigue strength prediction of bolted joint structures of carbon fiber reinforced polymer composite[J]. Composite Structures, 2015, 124: 345-356.
[5] 房子昂, 赵丽滨, 刘丰睿, 等. 碳纤维/树脂复合材料多钉连接钉载系数测试方法[J]. 复合材料学报, 2019, 36(12): 2795-2804.
[6] 周松. 复合材料螺栓连接渐进损伤的实验及数值分析[D]. 哈尔滨: 哈尔滨工程大学, 2013.
[7] POCHIRAJU K V, GYANESHWAR P T, GREGORY A S. Long-term durability of polymeric matrix composites[M]. Long-term durability of polymeric matrix composites, 2012.
[8] 史红星, 王斌团. 复合材料层合板与金属板螺栓连接载荷分配研究[C]//全国复合材料学术会议. 2012.
[9] 刘新, 武湛君, 蔡永超, 等. 超低温处理对T700碳纤维/环氧复合材料拉-压疲劳性能的影响[J]. 宇航学报, 2014, 35(7): 850-856.
[10] 王新新. 湿热条件下复合材料螺栓连接接头强度与疲劳研究[D]. 南京: 南京航空航天大学, 2012.
[11] MIVEHCHI H, VARVANI-FARAHANI A. The effect of temperature on fatigue strength and cumulative fatigue damage of FRP composites[J]. Procedia Engineering, 2010, 2(1): 2011-2020.
[12] DHOTE J X, COMER A J, STANLEY W F, et al. Investigation into compressive properties of liquid shim for aerospace bolted joints[J]. Composite Structures, 2014, 109: 224-230.
[13] OSKOUEI R H, IBRAHIM R N. The effect of clamping compressive stresses on the fatigue life of Al 7075-T6 bolted plates at different temperatures[J]. Materials & Design, 2012, 34: 90-97.
[14] SHINDO Y, TAKEDA T, NARITA F, et al. Delamination growth mechanisms in woven glass fiber reinforced polymer composites under Mode Ⅱ fatigue loading at cryogenic temperatures[J]. Composites ence & Technology, 2009, 69(11-12): 1904-1911.
[15] KAREN S, WHITLEY, et al. Thermal/mechanical response of a polymer matrix composite at cryogenic temperatures[J]. Aiaa Journal, 2004, 42(10).
[16] 罗健, 石建军, 贾彬, 等. 低温暴露对碳纤维/环氧树脂复合材料拉伸力学性能的影响[J]. 复合材料学报, 2020, 37(12): 3091-3101.