RESEARCH ON THE EFFECT OF THE FIT CLEARANCES ON THE SKIN/CORE BOND OF THE HONEYCOMB SANDWICH STRUCTURE

doi:10.19936/j.cnki.2096-8000.20210528.016

Abstract

Abstract: To study the effect of the fit clearances on the skin/core bond, a series of composite sandwich samples with different artificial fit clearances were designed and fabricated, their quality of the skin/core bond was checked by ultrasonic C scan and mechanical performances were measured and analyzed by testing machine. The results of clearance checking were recorded and shot to get a further understanding about the effect of the fit clearance. It is found that the skin/core debond occurred when the fit clearance was thicker than the thickness of the adhesive. A good skin/core bond could be obtained when the foaming adhesive was used to fill the fit clearance as the compensatory adhesive. The reliability of the test to check the clearance depended on the vacuum degree in the bag greatly. The profile of the honeycomb core was milled into steps, which was more beneficial to the skin/core bond than the oblique plane machined.

Key words: honeycomb sandwich, fit clearance, profile, vacuum degree, core bonding, composites

CLC Number:

TB332

LIU Zhi-jie, ZHANG Yan-fang, LIU An-li, LENG Wei-hong, HE Kai. RESEARCH ON THE EFFECT OF THE FIT CLEARANCES ON THE SKIN/CORE BOND OF THE HONEYCOMB SANDWICH STRUCTURE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(5): 104-109.

References

[1] 程文礼, 袁超, 邱启艳, 等. 航空用蜂窝夹层结构及制造工艺[J]. 航空制造技术, 2015(7): 94-98.
[2] 汪亮, 孙玲. 变截面蜂窝夹层结构复合材料胶接工艺研究[J]. 玻璃钢/复合材料, 2009(1): 65-67.
[3] 梁春生, 邱启艳, 陈静, 等. 蜂窝夹层结构复合材料胶接共固化工艺技术研究[J]. 航空制造技术, 2014(15): 86-89.
[4] 章令晖, 韩宇, 沃西源, 等. 蜂窝夹层结构常见制造缺陷分析[J]. 航天返回与遥感, 2006, 27(1): 57-61.
[5] 万蕾, 孙璐, 李晶, 等. 蜂窝夹层结构基板脱粘问题分析[J]. 失效分析与预防, 2015, 10(1): 36-40.
[6] 曾小苗, 罗琳胤, 邵俊欣, 等. 复合材料夹层结构蜂窝与面板脱粘研究[J]. 航空制造技术, 2015(s2): 150-156.
[7] 毕红艳, 段友社, 谢凯文. 共固化成型蜂窝夹层结构缺陷分析及工艺改进[J]. 航空制造技术, 2014(15): 106-109.
[8] 陈蔚, 成理, 叶宏军, 等. Nomex蜂窝夹层复合材料的成型工艺研究[J]. 玻璃钢/复合材料, 2017(7): 70-73.
[9] 袁超, 张明. 复合材料蜂窝夹层结构方向舵二次胶接成型技术研究[J]. 科技与创新, 2019(7): 92-93.
[10] GROVE S M, POPHAM E, MILES M E. An investigation of the skin/core bond in honeycomb sandwich structures using statistical experimentation techniques[J]. Composites Part A, 2006, 37(5): 804-812.
[11] SIKDAR S, BANERJEE S. Identification of disbond and high density core region in a honeycomb composite sandwich structure using ultrasonic guided waves[J]. Composite Structure, 2016, 152: 568-578.
[12] 张广成, 赵景利. 蜂窝夹层结构复合材料的力学性能研究[J]. 机械科学与技术, 2003, 22(2): 280-282.
[13] VADAKKE V, CARLSSON L A.Experimental investigation of compression failure of sandwich specimens with face/core debond[J].Composites Part B, 2004, 35(68): 583-590.
[14] 王一臣, 王熙. 压电蜂窝夹层板表面局部分层热屈曲[J]. 玻璃钢/复合材料, 2016(5): 30-35.
[15] 原崇新, 李敏, 顾轶卓, 等. 蜂窝夹层结构真空袋共固化工艺过程实验研究[J]. 复合材料学报, 2008, 25(2): 57-62.
[16] 周祝林. 蜂窝夹层梁弯曲理论与试验比较[J]. 玻璃钢/复合材料, 1992(2): 17-20.
[17] XIONG J, MA L, STOCCHI A, et al. Bending response of carbon fiber composite sandwich beams with three dimensional honeycomb cores[J]. Composite Structure, 2014, 108(1): 234-242.
[18] 李跃宇. 含脱层的蜂窝夹心板结构的弯曲试验研究[J]. 玻璃钢/复合材料, 1998(2): 16-19.