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<p>Abrasive waterjet machining (AWJM) technology has been widely accepted for various machining and material cutting applications. Machining soft and thin materials with acceptable cutting quality requires a relatively low waterjet pump capacity, typically below 150 MPa. This study aims to predict surface roughness (R<sub>a</sub>) and kerf angle (R<sub>a</sub>) in the waterjet machining of fiber metal laminate (FML) composites under low-pressure conditions. This work examines the impact of process parameters on surface roughness (R<sub>a</sub>) in abrasive waterjet machining of FML composites with varying fiber orientation angles. The process variables considered here include traverse speed and water pressure. ANOVA and DOE were used to evaluate the significance of process parameters affecting surface roughness and kerf angle. At the same time, treatment was the only influential parameter on the cutting characteristics. The results further reveal that low water pressure minimizes variation between surface roughness parameters (R<sub>aTop</sub> and R<sub>aAvg</sub>). The findings reveal that an increase in abrasive flow rate (g/min) leads to a corresponding increase in the kinetic energy of the waterjet. The surface roughness had reached a peak due to the kinetic energy. SEM images were employed to characterize micro-cracks and ploughing induced by abrasive waterjet (AWJ) machining.</p>

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Influence of Abrasive Water Jet Machining Parameters on Processing Efficency, Structural Responces, and Cutting-Induced Characterstics of Fiber Metal Laminates

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • S. Qutaba,
  • M. Kashif,
  • A. Azhari

摘要

Abrasive waterjet machining (AWJM) technology has been widely accepted for various machining and material cutting applications. Machining soft and thin materials with acceptable cutting quality requires a relatively low waterjet pump capacity, typically below 150 MPa. This study aims to predict surface roughness (Ra) and kerf angle (Ra) in the waterjet machining of fiber metal laminate (FML) composites under low-pressure conditions. This work examines the impact of process parameters on surface roughness (Ra) in abrasive waterjet machining of FML composites with varying fiber orientation angles. The process variables considered here include traverse speed and water pressure. ANOVA and DOE were used to evaluate the significance of process parameters affecting surface roughness and kerf angle. At the same time, treatment was the only influential parameter on the cutting characteristics. The results further reveal that low water pressure minimizes variation between surface roughness parameters (RaTop and RaAvg). The findings reveal that an increase in abrasive flow rate (g/min) leads to a corresponding increase in the kinetic energy of the waterjet. The surface roughness had reached a peak due to the kinetic energy. SEM images were employed to characterize micro-cracks and ploughing induced by abrasive waterjet (AWJ) machining.