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Formation mechanism of CFRP pipe concave drilling defects

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Abstract

Due to the excellent performance of carbon fiber-reinforced plastic (CFRP), it is used more and more widely in the form of pipe and shaft parts. In order to reveal the formation mechanism of CFRP pipe concave drilling defects, the causes of hole entrance defects, exit defects, and exit sidewall defects were analyzed by combining theory with experiment, and the effects of different processing parameters on hole exit delamination defects were studied. Through theoretical analysis, it is found that the delamination at the front end of the chisel edge does not necessarily affect the final defects of the hole in CFRP pipe concave drilling. The experiment proves that the chisel edge can effectively drill through the outermost material and has no effect on the formation of the final hole damage. When the candle stick drill is used for drilling, there is almost no damage at the hole entry. After the outermost woven fiber cloth is drilled through, different degrees of damage occur at the intersection of longitudinal and transverse fibers.

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Funding

The work is supported by the National Natural Science Foundation of China (No. 52105442, No. 52275423, No. 51975208), Natural Science Foundation of Hunan Province (No. 2022JJ40152), and Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology Fund (No. 22–35-4-S009).

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Authors and Affiliations

  1. School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China

    Xinyi Qiu, Pengnan Li, Lingyan Tang, Changping Li, Lintao Xiang & Shujian Li

  2. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan, 411201, China

    Siwen Tang

  3. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea

    Tae Jo Ko

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  1. Xinyi Qiu
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  2. Pengnan Li
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  4. Changping Li
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Contributions

Xinyi Qiu: conceptualization, methodology, investigation, data collection and analysis, writing, funding acquisition—original draft. Pengnan Li: conceptualization, methodology, funding acquisition, writing—review and editing. Lingyan Tang: conceptualization, methodology—review and editing. Changping Li: conceptualization, review, and editing. Lintao Xiang: investigation, methodology. Shujian Li: supervision, funding acquisition. Siwen Tang: supervision, methodology. Tae Jo Ko: supervision, review, and editing.

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Correspondence to Pengnan Li.

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We would like to submit the manuscript entitled “Formation mechanism of CFRP pipe concave drilling defects” by Xinyi Qiu, Pengnan Li, Lingyan Tang, Changping Li, Lintao Xiang, Shujian Li, Siwen Tang, and Tae Jo Ko, and we wish to be considered for publication in the International Journal of Advanced Manufacturing Technology.

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Qiu, X., Li, P., Tang, L. et al. Formation mechanism of CFRP pipe concave drilling defects. Int J Adv Manuf Technol 127, 3557–3567 (2023). https://doi.org/10.1007/s00170-023-11741-2

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  • DOI: https://doi.org/10.1007/s00170-023-11741-2

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