Theoretical modeling for the exit-delamination morphology of the unidirectional CFRPs

  • Fei SuEmail author
  • Lei Zheng
  • Fujian Sun
  • Zhaohui Deng
  • Xinyi Qiu


Accurate exit-delamination morphology (i.e., shape and size) is of great significance both to evaluate and to control for the delamination during the drilling of carbon fiber-reinforced plastics. However, the morphology of the exit delamination in different fiber orientations is still difficult to precisely predict. In this paper, a theoretical model is established based on the classical bending theory of beam and the linear elastic fracture mechanics for determining the exit-delamination morphology. Based on this theoretical model, the accurate exit-delamination morphology can be precisely predicted. The results show that the exit-delamination zone is near to the elliptical shape, and its size decreases with the increasing of the cutting speed but increases with the increasing of the feed speed. Both the Zhang model and the beam theory model can predict the exit determination morphology. The beam theory model can reflect effectively the influences of the cutting speed and the feed speed on the exit delamination.


Carbon fiber-reinforced plastic (CFRP) Drilling Exit delamination Classical bending theory of beam 


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Special thanks to the National Science Foundation of China (No. 51805164) and the Qing Lan Project of Jiangsu Higher Education of China, Jiangsu Provincial Six-Big-Talent-Peak High Level Personnel Project of China (JXQC-029), for funding this work.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Fei Su
    • 1
    • 2
    Email author
  • Lei Zheng
    • 3
  • Fujian Sun
    • 1
    • 2
  • Zhaohui Deng
    • 1
    • 2
  • Xinyi Qiu
    • 1
  1. 1.Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut MaterialHunan University of Science and TechnologyXiangtanChina
  2. 2.Intelligent Manufacturing Institute of HNUSTHunan University of Science and TechnologyXiangtanChina
  3. 3.School of Mechanical EngineeringYancheng Institute of TechnologyYanchengChina

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