Effects of delamination on compressional properties of composite laminate
ZHOU Rui1, GUAN Zhidong1, JIA Yunchao1, WANG Kailun1, ZHANG Chenqian2
1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China
Compressional behaviors of composite laminates were experimentally investigated based on three measuring methods, Shadow Moiré measurement, strain measurement on the surface of laminates and C-scan together with multi-stage loading. Laminates with artificial delamination of various depths, sizes and quantities were studied. The buckling of sub-layer, the extension of delamination and the instability phenomena during the experiments were observed, compared and connected. Three different modes of the extension of delamination were summarized based on the experimental results. The mechanisms of the buckling of sub-layer, the instability of the laminates, etc. were analyzed based on the three modes. The critical buckling stress, the final failure stress and the delamination extension extent through the vertical direction were compared and combined with the experimental phenomenon to analyze the effects of delamination on compressional properties of composite laminate systematically. The results can provide guidance for the damage tolerance designing of composite structures.
周睿, 关志东, 贾云超, 王凯伦, 张晨乾. 分层缺陷对复合材料层板压缩性能的影响[J]. 北京航空航天大学学报, 2015, 41(2): 311-317.
ZHOU Rui, GUAN Zhidong, JIA Yunchao, WANG Kailun, ZHANG Chenqian. Effects of delamination on compressional properties of composite laminate. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2015, 41(2): 311-317.
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2015, Vol. 41 
