INFLUENCE OF TOOL-PART INTERACTION ON CURE-INDUCED STRAIN IN COMPOSITE

Abstract

Abstract: During the curing process of composite in autoclave, the deformation during demoulding of the workpiece is still an important factor affecting the quality of forming. By using thermocouple and fiber bragg grating sensor, the temperature and strain profile of the composite in autoclave process were monitored in situ, the strain development caused by tool-part interaction were studied, and the influence of resin cure on tool-part interaction were discussed. The results show that, in the initial stage of cure process, the strain is mostly caused by part compaction, resin flow, and gel. Then the tool-part interaction increases along with the resin′s degree of cure grows. The interface of tool and part is translated to sticking condition. As the temperature drops, the detach caused by tool-part interaction leads to stress release in the part, and the stress release would weaken tool-part interaction.

Key words: composite, fiber Bragg grating, cure-induced strain, tool, interaction

CLC Number:

TB332

JIANG Cheng-biao, ZHAN Li-hua, YANG Xiao-bo, LIU Gui-ming. INFLUENCE OF TOOL-PART INTERACTION ON CURE-INDUCED STRAIN IN COMPOSITE[J]. Fiber Reinforced Plastics/Composites, 2018, 0(6): 11-15.

References

[1] 陈绍杰. 复合材料技术与大型飞机[J]. 航空学报, 2008, 29(3): 605-610.
[2] 杜善义. 先进复合材料与航空航天[J]. 复合材料学报, 2007, 24(1): 1-12.
[3] Kim S S, Murayana H, Kageyama K, et al. Study on the curing process for carbon/epoxy composites to reduce thermal residual stress[J]. Composites Part A: Applied Science and Manufacturing, 2012, 43(8): 1197-1202.
[4] Kim H S, Yoo S H, Chang S H. In situ monitoring of the strain evolution and curing reaction of composite laminates to reduce the thermal residual stress using FBG sensor and dielectrometry[J]. Composites Part B: Engi-neering, 2013, 44(1): 446-452.
[5] 李雪芹, 周玉敬, 张子龙, 等. 光纤布拉格光栅传感器监测环氧树脂固化收缩研究[J]. 材料工程, 2012(8): 73-77.
[6] 岳广全, 张嘉振, 张博明. 模具对复合材料构件固化变形的影响分析[J]. 复合材料学报, 2013, 30(4): 206-210.
[7] Twigg G, Poursartip A, FERNLUND G. Tool-part interaction in composites processing. Part I: experimental investigation and analytical model[J]. Composites Part A: Applied Science and Manufacturing, 2004, 35(1): 121-133.
[8] Potter K D, Campbell M, Langer C, et al. The generation of geometrical deformations due to tool/part interaction in the manufacture of composite components[J]. Composites part A: Applied science and manufacturing, 2005, 36(2): 301-308.
[9] Zeng X, Raghavan J. Role of tool-part interaction in process-induced warpage of autoclave-manufactured composite structures[J]. Composites Part A: Applied Science and Manufacturing, 2010, 41(9): 1174-1183.
[10] Twigg G, Poursartip A, Fernlund G. An experimental method for quantifying tool-part shear interaction during composites processing[J]. Composites Science and Technology, 2003, 63(13): 1985-2002.
[11] Parlevliet P P, Bersee H E N, Beukers A. Measurement of (post-) curing strain development with fiber Bragg gratings[J]. Polymer Testing, 2010, 29(3): 291-301.
[12] 万里冰, 武湛君, 张博明, 等. 光纤布拉格光栅监测复合材料固化[J]. 复合材料学报, 2004, 21(3): 1-5.
[13] 贾子光, 任亮, 李宏男, 等. 应用光纤光栅传感器监测复合材料固化过程[J]. 中国激光, 2010, 37(5): 1298-1303.
[14] Shen X Y. Cure monitoring of composites based on embedded fiber bragg gratings[J]. Advanced Materials Research, 2011, 211(21): 585-589.
[15] Guo Z S. Strain and temperature monitoring of asymmetric composite laminate using FBG hybrid sensors[J]. Structural Health Monitoring, 2007, 6(3): 191-197.
[16] 陆立明. 热固性树脂[M]. 上海: 东华大学出版社, 2009: 35-36.