湿热环境下复材修理压缩解析模型及极限载荷的二分法分析

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (10): 58-64.

湿热环境下复材修理压缩解析模型及极限载荷的二分法分析

苏日新, 余音^*

上海交通大学,航空航天学院民机结构强度综合实验室,上海200240

收稿日期:2018-12-14 出版日期:2019-10-28 发布日期:2019-10-28
通讯作者: 余音(1964-),女,副教授,博士生导师,主要从事复合材料结构力学方面的研究,yuyin@sjtu.edu.cn。
作者简介:苏日新(1994-),男,硕士,主要从事复合材料结构设计方面的研究。

COMPOSITE MATERIAL REPAIR COMPRESSION ANALYSIS MODEL AND DICHOTOMYANALYSIS OF ULTIMATE LOAD IN HYGROTHERMAL ENVIRONMENT

SU Ri-xin, YU Yin^*

Laboratory of Civil Aircraft Structures Testing, School of Aeronautics and Astronautics,Shanghai Jiaotong University, Shanghai 200240, China

Received:2018-12-14 Online:2019-10-28 Published:2019-10-28

摘要/Abstract

摘要： 解析模型具有计算速度快、直观反映各参数对力学性能的影响等优点。建立了湿热环境下复材修理压缩解析模型。模型中考虑了湿热对复合材料力学性能的影响,以及湿热所产生的湿热应力。模型假设修理结构受压后的破坏模式分为母板压缩破坏、补片压缩破坏和胶层剪切破坏三种,任何一种破坏模式先发生,对应的载荷即为极限载荷。模型先直接求得湿热环境下补片或母板压缩破坏模式下对应的极限载荷,引入二分法求得湿热环境下胶层剪切破坏模式下对应的极限载荷。在不同湿热环境下对复材胶接修理结构进行压缩试验,并用本文方法求出解析解,试验结果和解析解吻合良好。本文方法可以为湿热环境下复材胶接修理结构的设计提供参考。

关键词: 复合材料, 湿热环境, 压缩解析模型, 胶接修理, 极限载荷, 二分法

Abstract: The analytical model has the advantages of fast calculation speed and intuitive response to the influence of various parameters on mechanical properties. A compression analysis model for composite material repair in hygrothermal environment was established. The influence of hygrothermal on the mechanical properties of the composite and the wet thermal stress generated by hygrothermal were considered in the model. After the repair structure is under pressure, the model assumes that the structure′s failure mode is classified into three types: the compression failure of the motherboard, the compression failure of the patch and the shear failure of the adhesive. Any failure mode occurs first, and the corresponding load is the ultimate load. In hygrothermal environment, if the failure mode of the repair structure is the compression failure of the motherboard or patch, the model directly obtains its corresponding ultimate load first. Using the dichotomy method, the corresponding ultimate load in the shear failure mode of the adhesive in hygrothermal environment is obtained. The compression test of the composite repairing structure in different hygrothermal environments was carried out, and the analytical solution was obtained by the method of this paper. The test results were in good agreement with the analytical solution. The method of this paper can provide reference for the design of the composite glue repairing structure in hygrothermal environment.

Key words: composite material, hygrothermal environment, compression analytical model, glue repair, ultimate load, dichotomy

中图分类号:

TB332

苏日新, 余音. 湿热环境下复材修理压缩解析模型及极限载荷的二分法分析[J]. 玻璃钢/复合材料, 2019, 0(10): 58-64.

SU Ri-xin, YU Yin. COMPOSITE MATERIAL REPAIR COMPRESSION ANALYSIS MODEL AND DICHOTOMYANALYSIS OF ULTIMATE LOAD IN HYGROTHERMAL ENVIRONMENT[J]. Fiber Reinforced Plastics/Composites, 2019, 0(10): 58-64.

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