ANALYSIS ON EDGEWISE COMPRESSIVE FAILURE LOAD AND MODE OF COMPOSITESANDWICH STRUCTURES WITH CIRCULAR DEBOND DEFECTS

Abstract

Abstract: In order to analyze the edgewise compressive failure load and mode of composite sandwich structures with debond defects, damage initiation criteria and damage evolution laws are employed to simulate the damage and failure process of the panels and adhesives. Three dimensional progressive damage analysis models are established which can take into account the material failure. Failure load and mode are analyzed for two typical sandwich structures based on the three dimensional model, and the analysis results are validated by the test results. The results show that the edgewise compressive failure mode of sandwich structures with central circular debond defect is material failure when the panel is weak. As the load increases, damage occurs around the debond zone and extends along the width direction, and finally failure occurs when the material is totally damaged. Failure mode is overall buckling when the panel has strong rigidity, and the structure loses load-carrying capacity and collapses rapidly when buckling happens. The analysis failure load matches well with the test value, and failure mode is also consistent well with the test results.

Key words: debond, sandwich structures, failure load, failure mode, damage

CLC Number:

TB332

ZHANG Wei, LUO Li-long, ZHANG Guo-fan, WU Cun-li. ANALYSIS ON EDGEWISE COMPRESSIVE FAILURE LOAD AND MODE OF COMPOSITESANDWICH STRUCTURES WITH CIRCULAR DEBOND DEFECTS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(9): 46-51.

References

[1] 汤超, 乔玉炜. PMI泡沫夹层结构的材料非线性分析[J]. 玻璃钢/复合材料, 2013(1): 14-19.
[2] 杨慧, 刘兴宇, 徐东明. 缝合复合材料泡沫夹层结构稳定性研究[J]. 应用力学学报, 2015, 32(2): 299-303.
[3] 张铁亮, 丁运亮, 金海波. 基于有限元法的蜂窝夹层结构稳定性研究[J]. 复合材料学报, 2012, 29(3): 184-190.
[4] 陈业标, 汪海, 陈秀华. 飞机复合材料结构强度分析[M]. 上海: 上海交通大学出版社, 2011.
[5] 杜正兴, 刘洪权. 复合材料蜂窝夹层结构轴压载荷下总体屈曲计算研究[J]. 强度与环境, 2015, 42(6): 11-16.
[6] 王凯伦, 黎增山, 郭俊, 等. 薄蜂窝复合材料夹芯结构侧压性能研究[J]. 科学技术与工程, 2014, 14(34): 111-116.
[7] 张恩阳, 刘波, 陆振玉, 等. 无人机弹射蜂窝夹层结构破坏分析工程估算方法研究[J]. 玻璃钢/复合材料, 2015(9): 5-10.
[8] Vadakke V, Carlsson L A. Experimental investigation of compression failure of sandwich specimens with face/core debond[J]. Composites: Part B, 2004, 35: 583-590.
[9] Aviles F, Carlsson L A. Experimental study of debonded sandwich panels under compressive loading[J]. Journal of Sandwich Structures and Materials, 2006(8): 7-31.
[10] Aviles F, Carlsson L A. Three-dimensional finite element buckling analysis of debonded sandwich panels[J]. Journal of Composite Materials, 2006, 40(11): 993-1008.
[11] Aviles F, Carlsson L A. Post-buckling and debond propagation in sandwich panels subject to in-plane compression[J]. Engineering Fracture Mechanics, 2007, 74: 794-806.
[12] 杨凯, 刘立武, 于开平, 等. 带有典型缺陷的金属蜂窝夹层结构的剩余强度研究[J]. 固体火箭技术, 2011, 34(5): 652-654.
[13] Sridharan S, Li Y P. Static and dynamic delamination of foam core sandwich members[J]. American Institute of Aeronautics and Astronautics, 2006, 44(12): 2937-2948.
[14] 赵鹏成. 含缺陷复合材料蜂窝夹层结构力学性能研究[D]. 哈尔滨: 哈尔滨工程大学, 2009.
[15] Hashin Z. Failure criteria for unidirectional fiber composites[J]. Journal of Applied Mechanics, 1980, 47(2): 329-335.
[16] 刘银纬, 周晚林, 张思远. 复合材料低速冲击损伤的数值模拟研究[J]. 固体力学学报, 2011, 35: 1-5.
[17] Turon A, Davila C G, Camanho P P, et al. An engineering solution for mesh size effects in the simulation of delamination using cohesive zone models[J]. Engineering Fracture Mechanics, 2007, 74(10): 1665-1682.
[18] Benzeggagh M L, Kenane M. Measurement of mixed-mode delamination fracture toughness of unidirectional glass/epoxy composite with mixed-mode bending apparatus[J]. Composites Science and Technology, 1996, 56(4): 439-449.
[19] Standard test method for compressive residual strength properties of damaged polymer matrix composite plates: ASTM Standard D7137/D7137M[S]. 2007.