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Date of Publication:2022-10-06

Journal:兵工学报

Affiliation of Author(s):机械工程学院

Issue:7

Page Number:846-852

ISSN No.:1000-1093

Abstract:Carbon fiber/epoxy (C/E) composites are characterized by light weight, high modulus and high specific strength, which make their use especially attractive to aerospace applications. But heat is easy to aggregate during drilling of C/E composites because of their anisotropy, low interlayer strength and the low thermal conductivity. It can result in a high temperature gradient which has a significant effect on the quality of the workpiece and the tool wear. A drilling temperature field model of the unidirectional composites is developed. Based on the finite difference method (FDM), the temperature distribution and changes are simulated. A carbide twist drill is used in the experiments. The rise in temperature rise at different fiber directions and distribution of temperature field at the exit are measured by using thermocouples and infrared camera, respectively. The results show that the temperature distribution is in agreement with the temperature field model, the distribution of temperature field at the exit oval, and the in temperature rise is higher in parallel with the fiber direction.

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