Abstract
This paper presents a new method of piercing the carbon fibre reinforced polymer (CFRP) with abrasive water jet (AWJ), which can avoid delamination. The method consists of adding the abrasive particles in the water jet at the very beginning of jet formation, thus obtaining a mixed abrasive water jet during the first impact with the composite work piece. A new cutting system was designed and set up based on the proposed piercing method and was compared with a conventional AWJ cutting system. The main added values brought by this paper are: it validates our original concept; provides synthetic analyses, the effects of the AWJ homogeneity, and the abrasive inlet angle on the CFRP delamination, and it brings a complete set of recommendations on how to overcome the industrial difficulties caused by the delamination of the composite materials, during the piercing with AWJ.
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Abbreviations
- Dext :
-
Delamination extent [mm]
- Dmax :
-
The maximum diameter of delamination [mm]
- Dnom :
-
The nominal hole diameter [mm]
- do :
-
Water orifice diameter [mm]
- df :
-
Focusing tube diameter [mm]
- lf :
-
Focusing tube length [mm]
- ma :
-
Abrasives mass flow [kg/min]
- P:
-
Water pressure [MPa]
- Ra :
-
Surface roughness [µm]
- rk :
-
The top edge radius [mm]
- t:
-
Material thickness [mm]
- SOD:
-
Stand-off distance [mm]
- Ψ:
-
Abrasive inlet angle [degree]
- AE:
-
Acoustic emission
- AWJ:
-
Abrasive water jet
- CCD:
-
Central composite design
- CFRP:
-
Carbon fibre reinforced polymer/plastic
- DoE:
-
Design of experiments
- IDZ:
-
Initial damage zone
- UHP:
-
Ultra high-pressure pump
- RSM:
-
Response Surface Methodology
- RCZ:
-
Rough cutting zone
- SCZ:
-
Smooth cutting zone
- WJ:
-
Water jet
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Funding
This research was supported by HORIZON 2020 – DiCoMI Project, “Directional Composites through Manufacturing Innovation”, GA Nr. 778068.
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All authors contributed to design the proposed method. I.A.P and A.I.P. carried out the experiments. A.I.P. performed the measurements and optical analysis. All authors analysed the experimental results and wrote of the manuscript.
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Popan, I.A., Balc, N. & Popan, A.I. Avoiding carbon fibre reinforced polymer delamination during abrasive water jet piercing: a new piercing method. Int J Adv Manuf Technol 119, 1139–1152 (2022). https://doi.org/10.1007/s00170-021-08294-7
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DOI: https://doi.org/10.1007/s00170-021-08294-7