Abrasive Water Jet Machining of Multidirectional CFRP Laminates

El-Hofy, Mohamed; Helmy, Mohamed O.; Escobar‐Palafox, Gustavo; Kerrigan, Kevin; Scaife, Richard J.; El-Hofy, Hassan

doi:10.1016/j.procir.2017.12.109

Cited by 90 publications

(50 citation statements)

References 18 publications

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“…Similar results were obtained by El-Hofy [17]. In this study, the minimum conicity that can be obtained was indicated by applying high hydraulic pressure combined with a small stand-off distance.…”

Section: Introductionsupporting

confidence: 90%

“…The emphasis in this article is on the independent treatment of such areas. Several authors [17,22,24,27] calculate the kerf taper defect without taking this indication into account. This could cause the kerf taper values to be altered by the rounding radius generated on the top surface of machined material.…”

Section: Resultsmentioning

confidence: 99%

“…Three main parameters, which include hydraulic pressure, feed rate, and abrasive mass flow, were employed to determine their influence of the kerf taper generated. These parameters were designated based on the limitations of the CNC machine used, as well as the levels most employed in reviewed literature [17,22,24,31,32]. Also, they were converted into three different levels (-1, 0, 1) that represent minimum, central, and maximum values, respectively (Table 2).…”

Section: Reinforcementmentioning

confidence: 99%

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Kerf Taper Defect Minimization Based on Abrasive Waterjet Machining of Low Thickness Thermoplastic Carbon Fiber Composites C/TPU

et al. 2019

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Carbon fiber-reinforced thermoplastics (CFRTPs) are materials of great interest in industry. Like thermosets composite materials, they have an excellent weight/mechanical properties ratio and a high degree of automation in their manufacture and recyclability. However, these materials present difficulties in their machining due to their nature. Their anisotropy, together with their low glass transition temperature, can produce important defects in their machining. A process able to machine these materials correctly by producing very small thermal defects is abrasive waterjet machining. However, the dispersion of the waterjet produces a reduction in kinetic energy, which decreases its cutting capacity. This results in an inherent defect called a kerf taper. Also, machining these materials with reduced thicknesses can increase this defect due to the formation of a damage zone at the beginning of cut due to the abrasive particles. This paper studies the influence of cutting parameters on the kerf taper generated during waterjet machining of a thin-walled thermoplastic composite material (carbon/polyurethane, C/TPU). This influence was studied by means of an ANOVA statistical analysis, and a mathematical model was obtained by means of a response surface methodology (RSM). Kerf taper defect was evaluated using a new image processing methodology, where the initial and final damage zone was separated from the kerf taper defect. Finally, a combination of a hydraulic pressure of 3400 bar with a feed rate of 100 mm/min and an abrasive mass flow of 170 g/min produces the minimum kerf taper angle.

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Section: Introductionsupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Reinforcementmentioning

confidence: 99%

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Kerf Taper Defect Minimization Based on Abrasive Waterjet Machining of Low Thickness Thermoplastic Carbon Fiber Composites C/TPU

et al. 2019

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“…As a consequence of the above, increasingly more alternatives to traditional machining are being proposed, where abrasive waterjet machining (AWJM) may be an alternative thanks to a relevant number of specific advantages [14][15][16][17][18][19]:…”

Section: Introductionmentioning

confidence: 99%

Defect Analysis and Detection of Cutting Regions in CFRP Machining Using AWJM

et al. 2019

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The use of composite materials with a polymeric matrix, concretely carbon fiber reinforced polymer, is undergoing further development owing to the maturity reached by the forming processes and their excellent relationship in terms of specific properties. This means that they can be implemented more easily in different industrial sectors at a lower cost. However, when the components manufactured demand high dimensional and geometric requirements, they must be subjected to machining processes that cause damage to the material. As a result, alternative methods to conventional machining are increasingly being proposed. In this article, the abrasive waterjet machining process is proposed because of its advantages in terms of high production rates, absence of thermal damage and respect for the environment. In this way, it was possible to select parameters (stand-off distance, traverse feed rate, and abrasive mass flow rate) that minimize the characteristic defects of the process such as taper angle or the identification of different surface quality regions in order to eliminate striations caused by jet deviation. For this purpose, taper angle and roughness evaluations were carried out in three different zones: initial or jet inlet, intermediate, and final or jet outlet. In this way, it was possible to characterize different cutting regions with scanning electronic microscopy (SEM) and to distinguish the statistical significance of the parameters and their effects on the cut through an analysis of variance (ANOVA). This analysis has made it possible to distinguish the optimal parameters for the process.

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“…In the event that V f is more decrease cut increases [14]. Examined multidirectional CFRP Laminates on AWJM and came about that for better surface quality high weight, low V f and little S d is recommended [15]. Moreover, different techniques are used to optimise the process parameters theoretically like Taguchi method, fuzzy logic, ANOVA, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Feed Rate on Surface Roughness in Abrasive Waterjet Machining of Jute Fibre Reinforced Polyester Composites

Kalirasu¹,

Rajini²,

Rajesh³

et al. 2019

IJEAT

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The common fiber strengthened composite are as a rule progressively utilized in different applications like space, flying machine, marine, building and car segment on account of their prevalent physical and mechanical properties despite the fact that they are somewhat expensive. AWJM speaks to a worldwide adaptable instrument supporting the machining of every normal material that are with no harm by straight contact with water. In this present work plans to explore jute fiber strengthened unsaturated polyester resin composite material investigating surface Roughness by changing three parameters, for example, Pressure, Standoff distance and Feed rate an ideal state of the material can be found and furthermore investigation of the cut surface geography after grating water stream machining. Rough utilized for cutting is garnet 80 mesh abrasive particles. It catalyzes the cutting and gives phenomenal surface completion.

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Abrasive Water Jet Machining of Multidirectional CFRP Laminates

Cited by 90 publications

References 18 publications

Kerf Taper Defect Minimization Based on Abrasive Waterjet Machining of Low Thickness Thermoplastic Carbon Fiber Composites C/TPU

Kerf Taper Defect Minimization Based on Abrasive Waterjet Machining of Low Thickness Thermoplastic Carbon Fiber Composites C/TPU

Defect Analysis and Detection of Cutting Regions in CFRP Machining Using AWJM

Effect of Feed Rate on Surface Roughness in Abrasive Waterjet Machining of Jute Fibre Reinforced Polyester Composites

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