升温速率对复合材料修补片固化过程热应力的影响

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (2): 58-65.

升温速率对复合材料修补片固化过程热应力的影响

李世林, 陈淑仙^*, 田秋实, 梁振宇

中国民航飞行学院航空工程学院,广汉618307

收稿日期:2017-08-16 出版日期:2018-02-28 发布日期:2018-02-28
通讯作者: 陈淑仙(1975-),女,博士,教授,主要从事复合材料固化过程方面的研究,bellesavana@163.com。
作者简介:李世林(1978-),男,硕士,副教授,主要从事复合材料和航空发动机应用方面的研究。
基金资助:
国家自然科学基金民航联合基金重点项目(U1233202,U1333201);国家自然科学基金项目(51306201)

EFFECTS OF HEATING RATE ON THE THERMAL STRESS OF COMPOSITE PATCHES DURING CURING PROCESS

LI Shi-lin, CHEN Shu-xian^*, TIAN Qiu-shi, LIANG Zhen-yu

Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, China

Received:2017-08-16 Online:2018-02-28 Published:2018-02-28

摘要/Abstract

摘要： 采用有限元法数值模拟了3234/T300B热固性树脂基复合材料修补片的热补仪加热固化过程,分析了工程应用范围内不同升温速率下的复合材料修补片固化历程中的温度、热应力分布和变化特征,并研究了升温速率对补片在不同时间点的残余热应力值的影响规律。研究结果表明:升温阶段热应力主要集中在补片表面中心区域及其与母板接触的区域,降温阶段复合材料修补片内部热应力高于表面热应力;升温速率越快,固化越迅速,在升温阶段修补片内部热应力及峰值热应力越大;在保温和降温阶段,修补片内热应力分布和大小不受升温速率的影响;对于较低升温速率,热应力最大值出现在升温结束时刻;对于较高的升温速率,热应力最大值出现在接近升温末期的时刻。研究结果为合理选择升温速率从而减小升温阶段的内部热应力并控制补片分层等缺陷提供了参数依据。

关键词: 树脂基复合材, 修补片, 升温速率, 热补仪, 固化历程, 热应力

Abstract: The heat-blanket thermal curing process of thermosetting resin matrix composite patch was simulated using the finite element method. The distribution and variation characteristics of temperature and thermal stress of the composite patch for different heating rates were analyzed, and the effects of heating rates on the residual thermal stress in the patch at different time points were studied. The results show that the thermal stress is mainly concentrated on the central region of the patch top surface and in its contact area with the mother plate during the heating stage, and the thermal stress in the internal area is higher than that at the patch top surface during the isothermal and cooling stage. The results also show that the faster the heating rate is, the faster the curing is. But, the greater the peak thermal stress is during the heating phase. And the value and distribution of thermal stress of the patch are independent of the heating rate during the isothermal and cooling stage. The results also indicate that the maximum value of the thermal stress appears at the end of the heating stage for the lower heating rate, while the maximum thermal stress appears near the end of the heating stage for higher heating rates. The research results provide the good numerical basis for selection of the heating rate to reduce the internal thermal stress and to control the delamination of the patch in the heating stage.

Key words: resin matrix composite, patch, heating rate, heat-blanket, curing process, thermal stress

中图分类号:

TB332

李世林, 陈淑仙, 田秋实, 梁振宇. 升温速率对复合材料修补片固化过程热应力的影响[J]. 玻璃钢/复合材料, 2018, 0(2): 58-65.

LI Shi-lin, CHEN Shu-xian, TIAN Qiu-shi, LIANG Zhen-yu. EFFECTS OF HEATING RATE ON THE THERMAL STRESS OF COMPOSITE PATCHES DURING CURING PROCESS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(2): 58-65.

参考文献

[1] Rider A N, Wang C H, Cao J. Internal resistance heating for homogeneous curing of adhesively bonded repairs[J]. International Journal of Adhesion & Adhesives, 2011, 31(2): 168-176.
[2] Kim S S, Murayama H, Kageyama K. Study on the curing process for carbon/epoxy composites to reduce thermal residual stress[J]. Composites: Part A, 2012, 43: 1197-1202.
[3] Vautard F, Ozcan S, Poland L, et al. Influence of thermal history on the mechanical properties of carbon fiber-acrylate composites cured by electron beam and thermal processes[J]. Composites Part A: Applied Science and Manufacturing, 2013, 45(2): 162-172.
[4] Toudeshky H H, Sadighi M, Vojdani A. Effects of curing thermal residual stresses on fatigue crack propagation of aluminum plates repaired by FML patches[J]. Composite Structures, 2013, 100(6): 154-162.
[5] Radford D W,Diefendorf R J. Shape instabilities in composites resulting from laminate anisotropy[J]. Journal of Reinforced Plastics and Composites, 1993, 12(1): 58-75.
[6] Bogetti T A, Gillespie J W. Process-induced stress and deformation in thick-section thermoset composite laminates [J]. Journal of Composite Materials, 1992, 26(5): 626-660.
[7] Parlevliet P, Wouter A W, Bersee H E, et al. Thermal effects on microstructural matrix variations in thick-walled composites[J]. Composites Science and Technology, 2008, 68(3): 896-907.
[8] Kim H-S, Yoo S-H, Chang S-H. In situ monitoring of the strain evolution and curing reaction of composite laminates to reduce the thermal residual stress using FBG sensor and dielectrometry[J]. Composites Part B: Engineering, 2013, 44(1): 446-452.
[9] Zhang K, Gu Y, Li M, et al. Effect of rapid curing process on the properties of carbon fiber/epoxy composite fabricated using vacuum assisted resin infusion molding [J]. Materials & Design, 2014, 54: 624-631.
[10] 陈淑仙, 田鹤, 秦文峰, 等. 树脂基复合材料固化过程中的温度和热应力场三维瞬态分析[J]. 电子科技大学学报, 2014, 43(4): 547-551.
[11] 元振毅, 王永军, 张跃. 基于材料性能时变特性的复合材料固化过程多场耦合数值模拟[J].复合材料学报, 2015, 32(1): 167-175.
[12] 徐鹏, 晏冬秀, 刘卫平, 等. 大厚度复合材料层合板固化制度数值模拟[J]. 航空制造技术, 2017(2): 99-102.
[13] Andrew J J, Arumugam V, Santulli C. Effect of post-cure temperature and different reinforcements in adhesive bonded repair for damaged glass/epoxy composites under multiple quasi-static indentation loading[J]. Composite Structures, 2016, 143 (20): 63 -74.
[14] 陈淑仙, 王渊涛, 杨文锋, 等. 树脂基复合材料修补片固化过程中的温度场[J]. 西南交通大学学报, 2014, 49(5): 869-874.
[15] 庞杰, 刘国春. 复合材料挖补修理固化过程残余应力的三维数值模拟[J]. 玻璃钢/复合材料, 2016(8): 22-26.
[16] 唐庆如, 田秋实, 庞杰, 等. 挖补角度对复合材料修补片固化过程温度和热应力的影响[J]. 玻璃钢/复合材料, 2017(2): 15-20.
[17] 张博明, 戴福洪, 杜善义. 固化工艺规范对复合材料固化残余应力影响的实验研究[J]. 玻璃钢/复合材料, 2010(2): 52-61.
[18] 李君, 姚学锋, 刘应华. 复合材料固化过程中温度及应变场分布的解析解[J]. 清华大学学报(自然科学版), 2009, 49(5): 126-130.
[19] 杨梅. 复合材料液态成形工艺与性能的模拟及其计算方法[D]. 武汉: 武汉理工大学, 2007.