Mechanical properties and failure prediction of aluminum alloy-BFRP bonded joints under service high temperature aging
LUAN Jian-ze1, NA Jing-xin1, TAN Wei1, MU Wen-long1, SHEN Hao1, QIN Guo-feng2
1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
2. Teachers College for Vocational and Technical Education, Guangxi Normal University, Guilin 541004, Guangxi, China
Abstract：50℃ and 80℃ high temperature aging environments were selected and the quasi-static tensile strength and shear strength of the aluminum alloy-BFRP (basalt fiber reinforced polymer composite) bonded joints aged for 0, 10, 20 and 30 days under high-temperature were measured at the loading rate of 1 mm/min with the designed testing fixture.The failure section of the joint was analyzed by macroscopical analysis.After 80℃ high temperature aging,post curing occurs in adhesive,the mechanical properties are enhanced. Chemical bond fracture occurs in BFRP, and glass transition temperature (Tg) is decreased. After aging for 30 days, the tensile strength of the joint is decreased and the shear strength is increased. After 30 days, the failure section of tensile joint appears to be stratified. Mixed failure of adhesive layer cohesion and fiber tear appears in the shear joint. After 50℃ high temperature aging, the mechanical properties of adhesive are slightly increased. The failure strength of the tensile joint changes little, and the failure mode is dominated by fiber tearing and delamination.The failure strength of shear joint is increased slightly, and the failure mode is mainly adhesive cohesive. According to the secondary stress criterion, the curves of tensile strength and shear strength were fitted.According to the response surface principle, the response surface equation of failure criterion with aging time was established to predict the crack generation and propagation of the adhesive layer of aluminum alloy-BFRP bonded structures.
栾建泽, 那景新, 谭伟, 慕文龙, 申浩, 秦国锋. 铝合金-BFRP粘接接头的服役高温老化力学性能及失效预测[J]. 材料工程, 2020, 48(9): 166-172.
LUAN Jian-ze, NA Jing-xin, TAN Wei, MU Wen-long, SHEN Hao, QIN Guo-feng. Mechanical properties and failure prediction of aluminum alloy-BFRP bonded joints under service high temperature aging. Journal of Materials Engineering, 2020, 48(9): 166-172.
[1] 马建,刘晓东,陈轶嵩,等.中国新能源汽车产业与技术发展现状及对策[J].中国公路学报,2018,31(8):1-19. MA J, LIU X D, CHEN Y S,et al. Current status and countermeasures for China's new energy automobile industry and technology development[J]. China Journal of Highway and Transport,2018,31(8):1-19.
[2] 肖志,杜庆勇,莫富灏,等.连续碳纤维增强复合材料汽车顶盖铺层优化[J].汽车工程,2017,39(6):722-728. XIAO Z, DU Q Y, MO F H, et al. Ply optimization on vehicle roof of continuous carbon fiber reinforced polymer[J]. Automotive Engineering, 2017,39(6):722-728.
[3] 秦国锋,那景新,慕文龙,等.高温老化对CFRP/铝合金粘接接头失效的影响[J].吉林大学学报(工学版),2019,49(4):1063-1071. QIN G F, NA J X, MU W L,et al. Degradation failure of adhesively bonded CFRP/aluminum alloy subjected to high temperature environment[J]. Journal of Jilin University (Engineeringand Technology Edition),2019,49(4):1063-1071.
[4] 马芳武,杨猛,蒲永锋,等. 混杂比对碳纤维-玄武岩纤维混杂增强环氧树脂基复合材料弯曲性能的影响[J]. 复合材料学报, 2019,36(2):362-369. MA F W, YANG M, PU Y F, et al. Effect of hybrid ratio on the flexural properties of carbon and basalt hybrid fibers reinforced epoxy resin composites[J]. Acta Materiae Compositae Sinica, 2019, 36(2):362-369.
[5] MACHADO J J M, MARQUES E A S, DAILVA L F M. Mechanical behaviour of adhesively bonded composite single lap joints under quasi-static and impact conditions with variation of temperature and overlap[J]. Journal of Composite Materials, 2018, 52(26):3621-3635.
[6] VIANA G, COSTA M, BANEA M D, et al. A review on the temperature and moisture degradation of adhesive joints[J]. Proceedings of the Institution of Mechanical Engineers, 2017, 231(5):488-501.
[7] MARQUES E A S, DASILVA L F M, BANEA M D, et al. Adhesive joints for low-and high-temperature use:an overview[J]. The Journal of Adhesion, 2015, 91(7):556-585.
[8] PARK S Y, CHOI W J, CHOI C H, et al. The effect of curing temperature on thermal, physical and mechanical characteristics of two types of adhesives for aerospace structures[J]. Journal of Adhesion Science and Technology, 2018, 32(11):1200-1223.
[9] 张欢,许文,邹士文,等.环氧胶黏剂及其胶接界面热氧老化机理研究[J].材料导报,2017,31(12):104-108. ZHANG H, XU W, ZOU S W, et al. Thermal-oxidative aging mechanism of epoxy adhesive and its interface[J]. Materials Reports,2017,31(12):104-108.
[10] BANEA M D, DASILVA L F M, CAMPILHO R. Mode Ⅰ fracture toughness of adhesively bonded joints as a function of temperature:experimental and numerical study[J]. International Journal of Adhesion and Adhesives, 2011, 31(5):273-279.
[11] CAUSSE N,DANTRAS E, CLAIRE T, et, al. Environmental ageing of aerospace epoxy adhesive in bonded assembly configuration[J]. Journal of Thermal Analysis & Calorimetry, 2013, 114(2):621-628.
[12] HANCOX N L. Thermal effects on polymer matrix composites:part 1. thermal cycling[J]. Materials & Design, 1998, 19(3):85-91.
[13] SHIN P S, KIM J H, PARK H S,et al. Evaluation of thermally-aged carbon fiber/epoxy composites using acoustic emission, electrical resistance and thermogram[J]. Composite Structures, 2018,196,21-29.
[14] 宋健,温卫东. 考虑温度环境下树脂基复合材料力学性能及模型研究[J]. 航空动力学报, 2016,31(1):31-39. SONG J, WEN W D. Study on mechanical properties of resin composites and models considering temperature environment[J].Journal of Aerospace Power, 2016,31(1):31-39.
[15] OCAÑA R, ARENAS J M, ALÍA C, et al. Evaluation of degradation of structural adhesive joints in functional automotive applications[J]. Procedia Engineering, 2015, 132:716-723.
[16] PLAZEK D J,FRUND Z N. Epoxy resins (DGEBA):The curing and physical aging process[J]. Journal of Polymer Science:Part B, 1990, 28(4):431-448.
[17] BUDHE S, BANEAMD, BARROS S D, et al. An updated review of adhesively bonded joints in composite materials[J]. International Journal of Adhesion & Adhesives, 2017, 72:30-42.
[18] 秦国锋. 温湿老化对车用CFRP/铝合金粘接接头静态失效的影响[D].长春:吉林大学,2018. QIN G F. Effects of temperature and humidity on the static failure of adhesively bonded CFRP/aluminium alloy joints for automotive applications.[D].Changchun:Jilin University,2018.
[19] 栾建泽,那景新,谭伟,等.服役低温老化对铝合金-玄武岩纤维增强树脂复合材料粘接接头力学性能的影响及失效预测[J/OL].复合材料学报:1-9[2020-05-22].https://doi.org/10.13801/j.cnki.fhclxb.20191014.001. LUAN J Z, NA J X, TAN W, et al. Effect of service low-temperature aging on mechanical properties of aluminum alloy-basalt fiber reinforced polymer composite bonding joints and failure prediction[J/OL].Acta Materiae Compositae Sinica:1-9[2020-05-22].https://doi.org/10.13801/j.cnki.fhclxb.20191014.001.
[20] 那景新,浦磊鑫,范以撒,等.湿热环境对Sikaflex-265铝合金粘接接头失效强度的影响[J].吉林大学学报(工学版),2018,48(5):1331-1338. NA J X, PU L X, FAN Y S, et al. Effect of temperature and humidity on the failure strength of Sikaflex-265 aluminum adhesive joints[J]. Journal of Jilin University(Engineering and Technology Edition),2018,48(5):1331-1338.
2020, Vol. 48 
