EXPERIMENTAL STUDY ON BENDING DEFORMATION AND FAILURE OF LAMINATED DAMAGE COMPOSITES

Abstract

Abstract: In order to study the damage characteristic of composite with symmetric delamination, the buckling failure behavior and deformation field information of specimen containing symmetric multilayered unidirectional glass fiber reinforced composite specimens under three-point bending test were studied by using acoustic emission (AE) and digital image correlation (DIC) method. Then, the damage pattern of specimens was identified by k-means clustering analysis. The results showed that lamination damage led to the reduction of the bearing capacity of the material and the weakening of the resistance to deformation, and the layered damage under compression load was more obvious than that under tensile load. The layered damage composite material produced more AE damage signals during loading. The AE signals can be divided into three categories: low frequency, medium frequency and high frequency by cluster analysis, which were corresponding to matrix cracking and delamination, fiber debonding and fiber fracture of the symmetrical layered specimens. The displacement field of the specimen with stratified damage was unstable and the distribution of strain field was more dispersed than that of the blank control sample. AE technology can monitor internal damage information in real time, and DIC method can analyze the changes of specimen surface displacement field. Therefore, the combination of the two technologies is of great value for the structural health monitoring of composite materials.

Key words: composites, symmetric multiple delamination, acoustic emission, digital image correlation, cluster analysis

CLC Number:

TB332

QIN Reng, LI Xiao-tong, SHANG Ya-jing, ZHOU Wei. EXPERIMENTAL STUDY ON BENDING DEFORMATION AND FAILURE OF LAMINATED DAMAGE COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(6): 30-36.

References

[1] 宋传江, 王虎. 玻璃纤维增强复合材料工程化应用进展[J]. 中国塑料, 2015, 29(3): 9-15.
[2] 黄展鸿, 黄春芳, 张鉴炜, 等. 声发射技术在纤维增强复合材料损伤检测和破坏过程分析中的应用研究进展[J]. 材料导报, 2018, 32(7): 1122-1128.
[3] 施建伟, 张彦飞, 杜瑞奎, 等. 复合材料层合板三点弯曲分层损伤有限元模拟[J]. 工程塑料应用, 2015, 43(2): 60-63.
[4] Wimmer G, Kitzmuller W, Pinter G, et al. Computational and experimental investigation of delamination in L-shaped laminated composite components[J]. Engineering Fracture Mechanics, 2009, 76(18): 2810-2820.
[5] 李小丽, 张海兵, 朱龙翔. 声发射技术在航空维修中的应用进展[J]. 防制造技术, 2017(1): 64-66.
[6] Suresh Kumara C, Arumugama V, Santullib C. Characterization of indentation damage resistance of hybrid composite laminates using acoustic emission monitoring[J]. Composites Part B: Engineering, 2017, 111: 165-178.
[7] 李亚娟, 周伟, 刘然, 等. 风电叶片复合材料层间开裂声发射监测[J]. 河北大学学报(自然科学版), 2014, 34(2): 219-224.
[8] Fotouhi M, Najafabadi M A. Acoustic emission-based study to characterize the initiation of delamination in composite materials[J]. Journal of Thermoplastic Composite Materials, 2016, 29(4): 519-537.
[9] 邢璐, 王兵. 基于声发射技术的碳纤维复合材料损伤机理研究[J]. 价值工程, 2016, 35(19): 176-179.
[10] 赵文政, 李敏, 张燕南, 等. 复合材料损伤过程声发射信号聚类分析与压缩变形测量[J]. 玻璃钢/复合材料, 2018(6): 5-10.
[11] 赵文政, 张燕南, 雒新宇, 等. 复合材料波纹褶皱区域损伤变形测量及声发射监测[J]. 玻璃钢/复合材料, 2017(8): 53-60.
[12] 王朝, 常新龙, 张有宏, 等. 基于数字图像相关法的复合材料结构失效分析[J]. 固体火箭技术, 2017, 40(5): 614-619.
[13] Zhou W, Lv Z H, Li Z Y. Acoustic emission response and micro-deformation behavior for compressive buckling failure of multi-delaminated composites[J]. Journal of Strain Analysis for Engineering Design, 2016, 51(6): 397-407.
[14] 郝文峰, 原亚南, 姚学锋, 等. 基于数字图像相关方法的纤维-基体界面疲劳力学性能实验研究[J]. 塑料工业, 2015, 43(3): 123-126.
[15] 张燕南, 赵文政, 雒新宇, 等. 碳纤维编织复合材料拉伸变形测量及声发射监测[J]. 工程塑料应用, 2017, 45(8): 97-100.
[16] 杨志, 卢博远, 吕智慧, 等. 循环加载下复合材料胶接面变形与破坏实验研究[J]. 玻璃钢/复合材料, 2016(9): 5-11.
[17] Li L, Lomov S V, Yan X. Cluster analysis of acoustic emission signals for 2D and 3D woven glass/epoxy composites[J]. Composite Structures, 2014, 116: 286-299.
[18] Li L, Swolfs Y, Straumit I, et al. Cluster analysis of acoustic emission signals for 2D and 3D woven carbon fiber/epoxy composites[J]. Journal of Composite Materials, 2016, 50(14): 1921-1935.
[19] 孟超, 彭卫东, 宁小波, 等. 玻璃纤维复合材料损伤过程的声发射特性研究[J]. 玻璃钢/复合材料, 2016(12): 23-27.