模具构件相互作用对复合材料固化应变的影响分析

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (6): 11-15.

模具构件相互作用对复合材料固化应变的影响分析

蒋成标¹, 湛利华^1,2*, 杨晓波², 刘桂铭²

1.中南大学轻合金研究院,长沙410083;
2.中南大学机电工程学院,长沙410083

收稿日期:2017-12-01 出版日期:2018-06-28 发布日期:2018-06-28
通讯作者: 湛利华(1976-),女,博士,教授,主要从事先进材料制备技术与装备方面的研究,yjs-cast@csu.edu.cn。
作者简介:蒋成标(1993-),男,硕士,主要从事碳纤维增强热固性树脂复合材料方面的研究。
基金资助:
国家重点基础研究发展计划(973计划)项目(2014CB046502)

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

JIANG Cheng-biao¹, ZHAN Li-hua^1,2*, YANG Xiao-bo², LIU Gui-ming²

1.Institute of Light Alloy, Central South University, Changsha 410083, China;
2.School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

Received:2017-12-01 Online:2018-06-28 Published:2018-06-28

摘要/Abstract

摘要： 复合材料热压罐固化工艺中,构件的脱模变形是影响成型质量的重要原因。通过热电偶和光纤光栅传感器相结合的方法对复合材料构件在热压罐成型工艺过程中的温度和应变进行了在线监测,研究了模具构件的相互作用导致的应变发展,并分析了树脂固化对模具构件相互作用的影响。结果表明:固化过程初期,应变主要来自构件压实和树脂的流动、凝胶,而后模具构件的相互作用会随树脂固化度的增大而增大,模具与构件之间转变为粘接状态,降温时模具构件的相互作用会使二者发生分离导致构件发生应力释放,并且应力释放会使模具构件的相互作用减弱。

关键词: 复合材料, 布拉格光栅, 固化应变, 模具, 相互作用

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

中图分类号:

TB332

蒋成标, 湛利华, 杨晓波, 刘桂铭. 模具构件相互作用对复合材料固化应变的影响分析[J]. 玻璃钢/复合材料, 2018, 0(6): 11-15.

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.

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