含圆形脱粘缺陷复合材料夹层结构侧向压缩破坏载荷与破坏模式分析

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (9): 46-51.

含圆形脱粘缺陷复合材料夹层结构侧向压缩破坏载荷与破坏模式分析

张维¹, 罗利龙¹, 张国凡², 吴存利¹

1.中国飞机强度研究所,西安710065;
2.西北工业大学航空学院,西安710065

收稿日期:2018-01-23 出版日期:2018-09-28 发布日期:2018-09-28
作者简介:张维(1986-),男,硕士,工程师,主要从事飞机结构强度分析与计算力学方面的研究,zhangwei516318@163.com。

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

ZHANG Wei¹, LUO Li-long¹, ZHANG Guo-fan², WU Cun-li¹

1.Aircraft Strength Research Institute of China, Xi′an 710065, China;
2.College of Aeronautics, Northwestern Polytechnical University, Xi´an 710065, China

Received:2018-01-23 Online:2018-09-28 Published:2018-09-28

摘要/Abstract

摘要： 为分析含脱粘缺陷复合材料夹层结构侧压破坏载荷与破坏模式,采用损伤起始判据和损伤演化准则模拟面板与胶层的损伤及破坏过程,建立了考虑材料失效的三维渐进损伤分析模型。针对两种典型复合材料夹层结构,基于所建立的模型完成了破坏载荷预估和破坏模式分析,并将有限元分析与试验结果进行了对比。结果表明:面板较弱时,中部含圆形脱粘缺陷夹层结构侧压破坏模式通常为材料失效压缩破坏,随着载荷的增加,面板中部及脱粘区域周围发生损伤并沿板宽度方向向两侧扩展,直至材料完全损伤发生破坏;面板较强时,侧压破坏模式通常为整体失稳破坏,屈曲后结构基本不再具有继续承载的能力而迅速发生破坏。分析结果破坏载荷预估值与试验吻合较好,破坏模式与试验结果一致。

关键词: 脱粘, 夹层结构, 破坏载荷, 破坏模式, 损伤

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

中图分类号:

TB332

张维, 罗利龙, 张国凡, 吴存利. 含圆形脱粘缺陷复合材料夹层结构侧向压缩破坏载荷与破坏模式分析[J]. 玻璃钢/复合材料, 2018, 0(9): 46-51.

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.

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