Influence of Abrasive Waterjet Parameters on the Cutting and Drilling of CFRP/UNS A97075 and UNS A97075/CFRP Stacks

García, Raúl Ruíz; Mayuet, Pedro F.; Salguero, Jorge; Salguero, Jorge

doi:10.20944/preprints201812.0007.v1

Cited by 15 publications

(5 citation statements)

References 24 publications

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“…In their study, Ruiz-Garcia et al evaluated the applicability of AWJ machining for stacks formed by CFRP and aluminum alloy UNS A97050 by examining its abrasive effect. For the evaluation of the holes, macro-geometric deviations of roundness, cylindricity, and flatness were examined and it was determined that drilling parameters had significant effects on the roundness and cylindricity of the holes [41]. Shanmugam and Masood conducted experiments to measure the effects of traverse feed rate, abrasive mass flow rate, stand-off distance, and water pressure on kerf angle in the AWJ drilling of two types of composites: previously epoxyimpregnated graphite-woven fabric and glass epoxy.…”

Section: Introductionmentioning

confidence: 99%

Optimization of machining parameters for kerf angle and roundness error in abrasive water jet drilling of CFRP composites with different fiber orientation angles

Karataş

Motorcu

Gökkaya

2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, carbon fiber-reinforced polymer (CFRP) composites with three different fiber orientation angles (M1: [0°/90°] s , M2: [+ 45°/− 45°] s , and M3: [0°/45°/90°/− 45°] s) were drilled (with and without pilot holes) on an abrasive water jet (AWJ) machine and the effect of the drilling parameters on the kerf angle (K) and roundness error (Re) of selected holes was investigated to determine quality characteristics. The first aim of the study was the single-objective optimization of drilling parameters for minimum K and Re individually. The second aim was the multi-objective optimization of drilling parameters for the simultaneous minimization of both K and Re. The Taguchi method was applied for single-objective optimization, while all steps of the Taguchi-based gray relational analysis were used for multi-objective optimization. Drilling experiments were performed using the L16 (4 4) orthogonal array. Four levels each for water pressure, stand-off distance, traverse feed rate, and hole diameter were selected as control factors. Analysis of experimental findings revealed that pilot drilling improved the kerf angle of the hole by 12.4% and the roundness error by 22.87%. Minimum kerf angle and roundness error were realized in the AWJ drilling of the M3 CFRP. The most effective parameter on kerf angle and roundness error in AWJ drilling of M1, M2, and M3 CFRP materials was water pressure (80.6%, 76.9%, and 73.8%, respectively), followed by stand-off distance (11.7%, 12.0%, and 13.5%),while other drilling parameters remained below 10%. The statistical evaluation and optimization results in this study can contribute to the evaluation of the AWJ machinability of CFRP composites.

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Section: Introductionmentioning

confidence: 99%

Optimization of machining parameters for kerf angle and roundness error in abrasive water jet drilling of CFRP composites with different fiber orientation angles

Karataş

Motorcu

Gökkaya

2020

J Braz. Soc. Mech. Sci. Eng.

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“…In the threaded nozzle, when the pressure was maximum, the SiC abrasive particles increase the kinetic energy of the jet. More kinetic energy caused the removal of the maximum amount of material providing a smooth finish (Ruiz-Garcia et al , 2019; Madhu and Balasubramanian, 2017).…”

Section: Resultsmentioning

confidence: 99%

Effect of the threaded nozzle on delamination and surface texture of PEEK CF30 composite machined by abrasive jet

Balasubramanian¹,

Madhu

2021

WJE

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Purpose The purpose of this study is to bring out the machining characteristics of abrasive jet machining on carbon fibre reinforced thermoplastic composites utilized in aerospace and biomedical applications. Biocompatibility materials such as carbon fibres and polyether thermoplastics, like polyether ether ketone (PEEK) are widely used in trauma and orthopaedic surgery. Due to the heterogeneity, layered construction of reinforcing phase bonds with a resin matrix and abrasiveness of the reinforcing fibre, traditional drilling of carbon fibre-reinforced composites (CFRPs) are always challenging task. Design/methodology/approach An investigation is carried out using abrasive jet machine for drilling PEEK filled with 30 Wt.% carbon fibre (CF 30) using threaded and unthreaded nozzle to study the effect of abrasive jet process variables on surface roughness (Ra) and delamination factor (DF). Pressure (P) and stand-off distance (SOD) as important technological abrasive jet factors were evaluated. It is found that higher abrasive jet pressure and minimum SOD maybe selected to achieve minimum delamination. Findings The study further reported that the threaded nozzle minimized the surface roughness by 43% and delamination factor up to 12%. Originality/value This study of experimenting and observing the machining characteristics of CF30 by using a threaded nozzle is being tried for the first time and the results are deliberated.

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“…The 8-mm holes were a preferred fact that 7.92 mm is the most employed hole in the aerospace industry. 38 Hence, fabricated MFL was drilled to make a hole of 8-mm diameter. The surface roughness was measured along the drilled wall using surftest SJ210 39 with a cut-off length of 0.6 mm.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Parametric investigation on surface roughness and hole quality of Ti metal hybrid fibers cored laminate (MFL) during abrasive water jet drilling

Rajesh

Rajkumar

Ramraji

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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High-strength environment-friendly metal-fiber laminates (MFLs) are increasingly used for primary structures for various engineering applications. The surface roughness variation and delamination factor of a titanium (Ti) metal-cored basalt/flax fiber laminate were investigated during abrasive water jet drilling (AWJD). The present AWJD investigation is to establish the correlation of four important process independent variables of WJP—water jet pressure, TS—traverse speed, QMFR—abrasive mass flow rate, and SOD—stand-off distance to the delamination factor (Fd-top) and surface roughness (Ra) of drilled hole. Central composite design (CCD) of L29 orthogonal array was used to perform the experimental observations. The statistical approach (ANOVA) was employed to determine the contribution of individual AWJD parameters to drilling operation. It is identified from experimental results that the water jet pressure is the most predominant process parameter and its contribution on Fd-top and Ra were 74.28% and 72.48%, respectively. Increasing the water pressure from low (160 MPa) to its higher range (320 MPa) showed that the surface roughness and delamination factor were reduced irrespective of other drilling parameters. Increased water pressure provides enough kinetic energy for abrasive particles to facilitate a higher penetration potential during the drilling process. Scanning Electron Microscope (SEM) images show the machining-induced damages like ploughing marks, uncut fibers, ridges, craters, matrix smearing, and delamination on an abrasive water jet drilled surface of prepared MFL.

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Influence of Abrasive Waterjet Parameters on the Cutting and Drilling of CFRP/UNS A97075 and UNS A97075/CFRP Stacks

Cited by 15 publications

References 24 publications

Optimization of machining parameters for kerf angle and roundness error in abrasive water jet drilling of CFRP composites with different fiber orientation angles

Optimization of machining parameters for kerf angle and roundness error in abrasive water jet drilling of CFRP composites with different fiber orientation angles

Effect of the threaded nozzle on delamination and surface texture of PEEK CF30 composite machined by abrasive jet

Parametric investigation on surface roughness and hole quality of Ti metal hybrid fibers cored laminate (MFL) during abrasive water jet drilling

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