摘要
在复合材料结构整个屈曲承载过程中，从微观开始发生局部的纤维断裂、基体微裂纹等损伤，并随着屈曲程度的增加和屈曲模式的转化逐渐发生分层扩展。采用实验与数值计算相结合的方法，本文研究了工字型加筋壁板复合材料结构在压缩载荷作用下的屈曲行为。采用无损光学手段来非接触检测壁板表面的全场屈曲挠度，捕捉屈曲模态演化过程。基于有限元的数值模拟，预测了工字型加筋壁板复合材料结构的屈曲与后屈曲行为，用定量的实验数据来对比数值预测的壁板屈曲形态，表明实验和数值结果的离面挠度分布具有一致性。
During the overall buckling loading process of composite structure, the local damage, such as fiber breakage and matrix microcrack occur at microscale, and then delamination and propagation occur with the increase of buckling degree and the transformation of buckling mode. In this paper, the buckling behavior of I-shaped rib stiffened panel composite structure under compression load is studied by combining experiments with numerical calculation. Non-destructive optical method was used to detect the full-field buckling deflection of the panel surface, and to capture the evolution process of buckling mode. Based on the numerical simulation of finite element method, the buckling and post- buckling behaviors of I-shaped rib stiffened panel composite structures are predicted. It is shown that the off-plane deflection distribution of the experimental and numerical results is consistent.
作者
王彩英
白瑞祥
雷振坤
WANG Cai-ying;BAI Rui-xiang;LEI Zhen-kun(Baotou Light Industry Vocational and Technology College,Baotou 014035,China;State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China)
出处
《实验力学》
CSCD
北大核心
2018年第5期725-733,共9页
Journal of Experimental Mechanics
基金
国家自然科学基金(11572070,11472070,11772081)资助
关键词
加筋壁板
压缩测试
屈曲行为
投影条纹法
有限元
stiffened panel
compressive test
buckling behavior
projected fringe method
finiteelement method （FE）
