Abrasive waterjet machining was an effective method for cutting CFRP materials in various industries, while machining defects are inevitably observed especially for thick CFRP laminates due to the inherent characteristics of waterjet. In this work, a full factorial experimental array was employed totally involving 18 trials when using abrasive waterjet to cut CFRP laminate up to 10.0 mm thick. The influence of process parameters including hydraulic pressure, traverse speed, and stand-off distance on jet energy was deeply analyzed and the power-to-speed ratio (Ė/u) parameter was obtained, which was combined with the physical energy model of abrasive waterjet based on the energy method. The influence of process parameters on kerf characteristics/surface integrity and the mechanism of defects were further analyzed. Various surface defects along thickness direction were observed and corresponding mechanisms were investigated. Results showed that higher hydraulic pressure, lower traverse speed, and stand-off distance within in the selected range were preferred to obtain better surface quality. From the perspective of power-to-speed ratio (Ė/u), the surface roughness decreased rapidly up to ~ 68% with Ė/u increased from 20,000 to 40,000 J/m. When it exceeded 40,000 J/m, the downward trend gradually reduced and even became stable in the case of high stand-off distance. The level of kerf width generally increased with the increase of Ė/u irrespective of stand-off distance.
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This work is supported by the National Natural Science Foundation of China (51905163, 51875188) and the Natural Science Foundation of Hunan Province (2019JJ50053).
The authors declare that they have no competing interests.
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Li, M., Lin, X., Yang, X. et al. Study on kerf characteristics and surface integrity based on physical energy model during abrasive waterjet cutting of thick CFRP laminates. Int J Adv Manuf Technol 113, 73–85 (2021). https://doi.org/10.1007/s00170-021-06590-w
- Abrasive waterjet
- Kerf characteristics
- Surface integrity