纤维增强复合材料机翼长桁压缩破坏预测方法

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (09): 1471-1475.

纤维增强复合材料机翼长桁压缩破坏预测方法

胡祎乐1，余音1，汪海1，赵毅2

（1.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;2.上海飞机设计研究院结构部，上海 200232）

收稿日期:2012-02-16 出版日期:2012-09-28 发布日期:2012-09-28

A Failure Prediction Method of Fiber-Reinforced Composite Wing Stringer Subjected to Compressive Loading

HU Yi-Le-1, YU Yin-1, WANG Hai-1, ZHAO Yi-2

(1.Laboratory of Civil Aircraft Structures Testing, School of Aeronautics and Astronautics,Shanghai Jiaotong University, Shanghai 200240, China; 2.Structure Department, Shanghai Aircraft Design and Research Institute, Shanghai 200232, China)

Received:2012-02-16 Online:2012-09-28 Published:2012-09-28

摘要/Abstract

摘要： 提出了一种分析和预测在压缩载荷作用下纤维增强复合材料机翼长桁的极限承载能力以及破坏位置的方法，建立了分析其形变和渐进破坏的有限元模型，采用应力描述的二维Hashin失效准则预测材料的初始失效，并提出了一种材料受损后的刚度折减方案；由应力失效和断裂力学中的能量释放率控制材料渐进损伤的演化模式，并以损伤变量的形式表征材料的受损程度；在有限元软件ABAQUS/Standard平台上编写用户材料子程序（UMAT），运用黏性正则化方法帮助收敛，并将其预测结果与复合材料机翼长桁的压缩实验结果加以对比.结果表明，所得极限承载能力以及破坏位置的预测结果与相应的实验结果较吻合.

关键词: 纤维增强复合材料, 机翼长桁, 渐进损伤, 压损

Abstract:
A method for predicting and analyzing the ultimate load and the location of failure of fiber-reinforced composite wing stringer subjected to compressive loading was proposed. A three dimensional FE model was established for displacement and damage analysis. The onset of damage was predicted by 2DHashin’s initiation criterion. A new stiffness degradation method of damaged material was suggested. The progression of damage was controlled by a damage evolution law, which combines stress failure and fracture energy dissipation of fracture mechanics. The model characterized damages in the form of damage variables. It was implemented with a user subroutine UMAT of ABAQUS/Standard by using a viscous regularization method which improves the convergence. The numerical prediction was compared with the experimental results of the compression test of composite wing stringers, and the ultimate load and failure location correlate well with the prediction results.
Key words：

Key words: fiber-reinforced composite, wing stringer, progressive damage, compressive damage

中图分类号:

TB 332

胡祎乐1, 余音1, 汪海1, 赵毅2. 纤维增强复合材料机翼长桁压缩破坏预测方法[J]. 上海交通大学学报（自然版）, 2012, 46(09): 1471-1475.

HU Yi-Le-1, YU Yin-1, WANG Hai-1, ZHAO Yi-2. A Failure Prediction Method of Fiber-Reinforced Composite Wing Stringer Subjected to Compressive Loading[J]. Journal of Shanghai Jiaotong University, 2012, 46(09): 1471-1475.

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