Abstract
The phenomenon of heat accumulation and transportation in the composite materials is a very typical and critical issue during drilling process. In this study, a three-dimensional temperature field prediction model is proposed using finite difference method, based on the partly homogenization hypothesis of material, to predict temperature field in the process of drilling unidirectional carbon fiber/epoxy (C/E) composites. According to the drilling feed motion, drilling process is divided into four stages to study the temperature distributing characteristics. The results show that the temperature distribution predicted by numerical study has a good agreement with the experimental results. The temperature increases with increasing the drilling depth, and the burn phenomena is observed due to the heat accumulation, especially at the drill exit. Due to the fiber orientation, an elliptical shape of the temperature field along the direction is found for both numerical and experimental studies of C/E composites drilling process.
摘要
复合材料中热积累和传导是钻削过程中一个非常典型和关键的问题。本文采用有限差分法,基 于材料热物参数均匀化假设,建立了单向碳纤维/环氧树脂(C/E)复合材料钻孔温度场的三维预测模型, 并将钻削过程分为四个阶段来研究温度分布特征。结果表明,数值仿真的温度分布结果与实验结果吻 合程度较高。温度随着钻孔深度的增加而逐渐升高,并且由于热量的积累,在钻削出口处观察到热损 伤现象。由于纤维单向排布,C/E 复合材料钻削过程温度场分布的数值和实验结果均呈现椭圆形。
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Foundation item: Projects(51475073, 51605076, 51875079) supported by the National Natural Science Foundation of China; Project (2017YFB1301701) supported by the National Key Research and Development Program of China re]2018-07-31
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Bao, Yj., Wang, Yq., Gao, H. et al. Investigation on temperature field of unidirectional carbon fiber/epoxy composites during drilling process. J. Cent. South Univ. 26, 2717–2728 (2019). https://doi.org/10.1007/s11771-019-4208-2
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DOI: https://doi.org/10.1007/s11771-019-4208-2