Research of composite R-zone interlaminar properties on different kinds of damages

doi:10.19936/j.cnki.2096-8000.20260528.003

Abstract

Abstract: In aircraft structuraldesign practice, the R-zone is a key detail prone to generating out-of-plane interlaminar tensile stress. Based on the four-point bending test method, this paper designed an impact scheme to introduce barely visible impact damage (BVID) and obtain the influence of damage type, part thickness and environment type on the interlaminar tensile strength of R-zone under the damage condition. For the configuration presented in this paper, when the size of the defect is 15 mm×7 mm, the direction of the defect placement has little influence on the interlaminar tensile strength. For the 3.42 mm thick test specimensstudied in this paper, BVID causes a higher reduction in interlaminar tensile strength compared with manufacturing defects. For the test samples with different thicknesses, the interlaminar tensile strength is related to the thickness. The high temperature and wet environment has a certain influence on the interlaminar tensile strength, and the reduction coefficient in this paper is 0.38. The conclusions and rules of this paper can be used for guidance and reference in engineering application.

Key words: four-point bending test, composite, R-zone, defect effect, interlaminar tensile strength

CLC Number:

TB332

LI Yan, CHEN Lin, CAI Zhiqiang, LI Jun, YUAN Chongxin, LI Zhiyuan, CHEN Zhen. Research of composite R-zone interlaminar properties on different kinds of damages[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(5): 16-22.

References

[1] 邓飞飞, 肖光明, 成艳娜, 等. 大尺寸、大厚度泡沫夹层舱门制造技术研究[J]. 航空科学技术, 2022, 33(5): 18-23.
[2] 邓忠, 余音, 刘龙权, 等. 碳纤维增强复合材料曲梁弯曲失效分析[J]. 复合材料科学与工程, 2021(9): 74-78.
[3] 李根生, 张宪政. 复合材料R区结构渐近损伤和疲劳寿命趋势分析研究[J]. 当代化工研究, 2022(22): 123-125.
[4] 曹东风, 陈新昌, 冀运东, 等. 硅氧烷改性环氧树脂基复合材料层间力学性能与耐热性[J]. 复合材料学报, 2023, 40(11): 6098-6109.
[5] 黄雪萌, 房晓斌, 刘明泽, 等. 梁类零件R区质量控制技术研究[J]. 橡塑技术与装备, 2020, 46(24): 24-27.
[6] 郝新超. 基于Anderson-Darling检验的复合材料厚板层间拉伸强度性能研究及B基准值[J]. 材料导报, 2020, 34(增刊1): 480-485.
[7] ZUMAQUERO P L, JUSTO J, GRACIANI E. On the thickness dependence of ILTS in curved composite laminates[J]. Key Engineering Materials, 2018, 774: 523-528.
[8] PAUL P C, SAFF C R, SANGER K B, et al. Out of plane analysisfor composite structures[C]//NASA. Langley Research Center. Eighth DOD (NASA) FAA Conference on Fibrous Composites in Structural Design, Part 1. Washington, D.C.: NASA, 1990.
[9] CMH-17协调委员会. 复合材料手册3[M]. 汪海, 沈真, 丁惠梁, 等, 译. 上海: 上海交通大学出版社, 2015.
[10] 李家伟, 陈积懋. 无损检测手册[M]. 北京: 机械工业出版社, 2001.
[11] AHN S S, HONG S W, KOO J M, et al. Evaluation of compressive residual strength in composite material under impact damage[J]. Transactions of the Korean Society of Mechanical Engineers A, 2013, 37(4): 503-509.
[12] 余芬, 崔乃葳, 安伯宁, 等. 复合材料Ω形加筋壁板低速冲击渐进损伤及剩余强度分析[J]. 航空科学技术, 2023, 34(1): 28-36.
[13] HABIBI M, LAPERRIÈRE L, HASSANABADI H M. Influence of low-velocity impact on residual tensile properties of nonwoven flax/epoxy composite[J]. Composite Structures, 2018, 186: 175-182.
[14] 刘峰, 陈威杨, 周建国, 等. 混杂复合材料口盖机械冲击破坏机理研究[J]. 兵器装备工程学报, 2021, 42(9): 264-272.
[15] 张利军, 肇研, 罗云烽, 等. 湿热循环对CCF300/QY8911复合材料界面性能的影响[J]. 材料工程, 2012(2): 25-29, 49.
[16] 冯青, 李敏, 顾轶卓, 等. 不同湿热条件下碳纤维/环氧复合材料湿热性能实验研究[J]. 复合材料学报, 2010, 27(6): 16-20.
[17] 杨旭东, 安涛, 邹田春, 等. 湿热环境对碳纤维增强树脂基复合材料力学性能的影响及其损伤机理[J]. 材料工程, 2019, 47(7): 84-91.
[18] KEDWARD K T, WILSON R S, MCLEAN S K. Flextureof simply curved composite shapes[J]. Composites, 1989, 20(6): 527-536.
[19] MAKEEV A, SEON G, NIKISHKOV Y, et al. Methods for assessment of interlaminar tensile strength of composite materials[J]. Journal of Composite Materials, 2015, 49(7): 783-794.
[20] ASTM International. Standard test method for measuring the curved beam strength of a fiber-reinforced polymer-matrix composite: ASTM D6415/D6415M-22[S]. West Conshohocken: ASTM International, 2013.
[21] LEKHNITSKII S G. Anisotropic plates[M]. New York: Gordon and Breach, 1968.
[22] ASTM International. Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event: ASTM D7136/D7136M-15 [S]. West Conshohocken:ASTM International, 2015.
[23] TOMBLIN J S, NG Y C, RAJU K S. Material qualification and equivalency for polymer matrix composite material systems: updated procedure: DOT-FAA-AR-03-19[R]. Washington, D.C.:Office of Aviation Research, Federal Aviation Administration, 2003.
[24] ASTM International. Standard test method for moisture absorption properties and equilibrium conditioning of polymer matrix composite materials: ASTM D5229/D5229M-20[S]. West Conshohocken,ASTM International, 2014.
[25] ANDREW J J, SRINIVASAN S M, AROCKIARAJAN A, et al. Parameters influencing the impact response of fiber-reinforced polymer matrix composite materials: a critical review[J]. Composite Structures, 2019, 224: 111007.