THE SPRINGBACK STUDY OF I SHAPE STRINGER MANUFACTURED BY X850 PREPREG

Abstract

Abstract: The springback of I shape stringer manufactured by X850 prepreg is studied with simulation method in order to establish an accurate simulation model. Temperature falling period is the key point in the simulation model. In order to find suitable simulation model boundary condition, element size and discrete method are analyzed. Through parameter sensitivity analysis, the key parameter can be found. Then the simulation model is calibrated by adjusting the key parameter. The results show that the simulation results are different when choosing different element sizes and discrete methods. The 2 mm element size and monolayer discrete method are the best choice taking into account simulation accuracy and compute cost. The simulation model can perfect predict springback direction when the part size is small and temperature is homogeneous. Simulation accuracy can be improved by adjusting sensitive parameter. The calibrated model is verified by other projects, the difference between simulation result and measuring result is within 8%.

Key words: composite, springback, simulation model, discrete

CLC Number:

TB332

GAO Long-fei, XU Peng, WANG Shi-jie, LUAN Ying-wei. THE SPRINGBACK STUDY OF I SHAPE STRINGER MANUFACTURED BY X850 PREPREG[J]. Composites Science and Engineering, 2020, 0(4): 60-64.

References

[1] 李栋. 树脂基复合材料曲面构建固化变形过程数值模拟[D]. 长沙: 中南大学, 2014.
[2] 陈晓静. 复合材料构件固化成型的变形预测与补偿[D]. 南京: 南京航空航天大学, 2011.
[3] 王晓霞. 热固性树脂基复合材料的固化变形数值模拟[D]. 济南: 山东大学, 2012.
[4] 张铖. 大型复合材料结构热压罐工艺温度场权衡设计[D]. 哈尔滨: 哈尔滨工业大学, 2009.
[5] 李尚德. 飞机复材零件热压罐成形复材工装设计技术[D]. 南京: 南京航空航天大学, 2010.
[6] 傅承阳. 飞机复合材料制件热压罐成型温度场模拟与改善方法[D]. 南京: 南京航空航天大学, 2013.
[7] 张吉. 基于有限元模拟的复合材料构件热压罐成型工艺研究[D]. 南京: 南京航空航天大学, 2012.
[8] 刘望子, 汪心文, 管海新, 等. U型复合材料结构件热压罐固化变形及补偿技术应用研究[J]. 航空制造技术, 2017, 60(16): 64-69.
[9] 郑锡涛, 刘振东, 梁晶. 大型复合材料构件固化变形分析方法研究进展[J]. 航空制造技术, 2015, 483(14): 32-35.
[10] 李敏. 非对称复合材料层压板固化变形模拟与验证[J]. 武汉理工大学学报, 2009, 31(21): 137-140.
[11] 杨青, 刘卫平, 余木火, 等. 复合材料C型梁回弹变形影响因素权重分析[J]. 航空制造技术, 2017(7): 72-77.
[12] 李彩林, 余宁, 文友谊. 复合材料L型结构固化变形的数值模拟与补偿[J]. 塑料工业, 2016, 44(7): 51-54.
[13] 李君, 姚学锋, 刘应华, 等. 复合材料T型整体化结构固化翘曲变形模拟[J]. 复合材料学报, 2009, 26(1): 156-161.
[14] 王仁宇, 关志东, 王乾, 等. 复合材料V型构件的固化变形预测及其工装型面设计[J]. 材料导报, 2017, 31(1): 130-135.
[15] 彭亮, 毛伟, 赵美英. 复合材料层合板结构固化过程数值分析方法研究[J]. 西北工业大学学报, 2015(33): 900-905.
[16] 朱凌宇. 热固性树脂基纤维增强复合材料固化变形研究[D]. 南京: 南京航空航天大学, 2010.
[17] 马云荣, 贺继林, 李栋, 等. 树脂基复合材料曲面结构件固化变形数值模拟[J]. 复合材料学报, 2015, 32(3): 874-879.