EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE OF COMPOSITE MATERIAL BONDING INTERFACE UNDER CYCLIC LOADING

Abstract

Abstract: Researches on damage deformation and evolution behavior of adhesively bonded composite joints in real-time are of great importance for structural safety and its reliability assessment in service. In this paper, we use of Digital Image Correlation (DIC) and Acoustic Emission (AE) as complementary techniques for studying interfacial damage, deformation and failure behavior of adhesive-bonded composite single-lap joints under cyclic tension. On the basis of the average tensile failure load value, cyclic tensile tests were conducted with 70% and 80% of quasi-static failure loading, respectively. According to the damage deformation field, strain field information, and AE signals originated from damage of adhesive-bonded composite single-lap joints at different stages, the relationships between the mechanical failure mechanism of composite single-lap joints and the corresponding real-time deformation and AE signals were analyzed. The results show that the real-time micro-displacement field, AE relative energy, cumulative hits and amplitude spectra obtained from damage and failure of adhesive-bonded composite single-lap joints are connected with the initiation and propagation behavior of microcracks at adhesive interfaces. As the stress levels increase, the number of loading cycles that the joints can sustain before failure decreases.

Key words: cyclic loading, composite adhesive joints, acoustic emission, digital image correlation, damage evolution

CLC Number:

TB332

YANG Zhi, LU Bo-yuan, LV Zhi-hui, LI Zhi-yuan. EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE OF COMPOSITE MATERIAL BONDING INTERFACE UNDER CYCLIC LOADING[J]. Fiber Reinforced Plastics/Composites, 2016, 0(9): 5-11.

References

[1] 杨银环, 周振功, 郭颖, 等. 缺陷对单搭胶接接头力学性能的影响[J]. 复合材料学报, 2012, 29(5): 157-163.
[2] Kim K S, Yi Y M, Cho G R, et al. Failure prediction and strength improvement of uni-directional composite single lap bonded joints[J]. Composite Structures, 2008, 82(4): 513-520.
[3] Benyahia F, Bouanani M F, Albedah A. Effect of water absorption on the adhesive damage in bonded composite repair of aircraft structures[J]. Materials Design, 2014, 57: 435-441.
[4] Ribeiro F L, Borges L, d′Almeida J R M. Numerical stress analysis of carbon-fibre-reinforced epoxy composite single-lap joints[J]. International Journal of Adhesion and Adhesives, 2011, 31(5): 331-337.
[5] Choudhry R S, Hassan S F, Li S, et al. Damage in single lap joints of woven fabric reinforced polymeric composites subjected to transverse impact loading[J]. International Journal of Impact Engineering, 2015, 80: 76-93.
[6] Ji Y M, Han K.S. Fracture mechanics approach for failure of adhesive joints in wind turbine blades[J]. Renewable Energy, 2014, 65: 23-28.
[7] 梁祖典, 燕瑛, 张涛涛, 等. 复合材料单搭接胶接接头试验研究与数值模拟[J]. 北京航空航天大学学报, 2014, 40(12): 1786-1792.
[8] Zhou W, Liu R, Lv Z H, et al. Acoustic emission behaviors and damage mechanisms of adhesively bonded single-lap composite joints with adhesive defects[J]. Journal of Reinforced Plastics and Composites, 2015, 34(1): 84-92.
[9] Croccolo D, Cuppini R. Adhesive defect density estimation applying the acoustic emission technique[J]. International Journal of Adhesion and Adhesives, 2009,29(3): 234-239.
[10] Bak K M, Kalaichelvan K, Vijayaraghavan G K, et al. Study on the effect of adhesive thickness of single lap joints using acoustic emission and FEA[J]. Insight, 2013, 55(1): 35-40.
[11] 李亚娟, 周伟, 刘然, 等. 复合材料Ⅱ型分层损伤演化声发射监测[J]. 玻璃钢/复合材料, 2015(1): 54-58.
[12] Costa Mattos H S d, Monteiro A H, Palazzetti R. Failure analysis of adhesively bonded joints in composite materials[J]. Materials and Design, 2012(33): 242-247.
[13] Mohamed Bak K, KalaiChelvan K, Vijayaraghavan GK, et al. Acoustic emission wavelet transform on adhesively bonded single-lap joints of composite laminate during tensile test[J]. Journal of Reinforced Plastics and Composites, 2013, 32(2): 87-95.
[14] 郝文峰, 郭广平, 陈新文, 等. 基于数字图像相关方法的复合材料层间剪切性能研究[J]. 玻璃钢/复合材料, 2016(1): 29-32.
[15] Vijaya kumar R L, Bhat M R. Probabilistic stress variation studies on composite single lap joint using Monte Carlo simulation[J]. Composite Structures, 2015, 121: 351-361.
[16] Zarouchas D, van Hemelrijck D. Mechanical characterization and damage assessment of thick adhesives for wind turbine blades using acoustic emission and digital image correlation techniques[J]. Journal of Adhesion Science and Technology, 2014, 28(14,15): 1500-1516.
[17] McCrory J P, Al-Jumaili S K, Crivelli D, et al. Damage classification in carbon fibre composites using acoustic emission: A comparison of three techniques[J]. Composites Part B: Engineering, 2015, 68: 424-430.