J型加筋壁板结构轴压试验和承载能力数值预测_石冶金.pdfVIP

第30 卷第2 期 Vol.30 No.2 工 程 力 学 2013 年 2 月 Feb. 2013 ENGINEERING MECHANICS 413 文章编号：1000-4750(2013)02-0413-06 J 型加筋壁板结构轴压试验及承载能力数值预测 1 2 2 1 石冶金 ，白瑞祥 ，王晓平 ，陈保兴 (1. 中国商飞上海飞机设计研究院强度设计研究部，上海 200232 ；2. 大连理工大学工业装备结构分析国家重点实验室，大连 116024) 摘 要：设计了复合材料J 型加筋板轴压试验件形式和加载方式，试验研究了其承载能力和破坏形式，讨论了轴 压下复合材料加筋板件承载能力预测的有限元建模和分析方法，数值分析了加筋板屈曲和后屈曲模式，结果表明 如果不考虑损伤累积对结构承载能力的影响，预测值将明显偏高；而通过引入逐步破坏准则，考虑了基体破坏、 纤维基体剪切失效以及纤维断裂等损伤累积对结构承载能力的影响，可以提高数值预测精度。 关键词：复合材料；加筋板；稳定性；逐步破坏；有限元 中图分类号：TB332; V214.8 文献标志码：A doi: 10.6052/j.issn.1000-4750.2011.07.0469 EXPERIMENT AND LOAD-CARRYING CAPABILITY PREDICTION FOR J SHAPE STIFFENED COMPOSITE PLATE UNDER COMPRESSION 1 2 2 1 SHI Ye-jin , BAI Rui-xiang , WANG Xiao-ping , CHEN Bao-xing (1. Stress Department, Commercial Aircraft Corporation of China Ltd Shanghai Aircraft Design and Research Institute, Shanghai 200232, China; 2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China) Abstract: The specimen and corresponding cramping apparatus were designed for J shape composite stiffened plate under compression. The load-carrying capability and failure mode of the specimen were tested. Then the modeling and analysis methods for numerical investigation were discussed, and the buckling and post-buckling behaviors of the composite stiffened plate were studied by using finite element method (FEM). The prediction result of load-carrying capability of a structure, without consideration of the effect of cumulated damage on the capability, will be obviously higher than the experiment result. When considering failure criteria for the dama