SOM/SEM based Characterization of Internal Delaminations of CFRP Samples Machined by AWJM

Mayuet, Pedro F.; Girot, F.; Lamíkiz, Aitzol; Fernández-Vidal, S.R.; Salguero, Jorge; Marcos, M.

doi:10.1016/j.proeng.2015.12.549

Cited by 47 publications

(23 citation statements)

References 13 publications

(18 reference statements)

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“…Delamination is a major concern with FRP laminate that occurs majorly at jet entry and exit due to the initiation of the shock wave by the high-velocity jet, as shown in Fig. 5, which is the major reason for the rejection of parts by the aircraft industry [41]. Design of experiment (DOE) is a useful technique to study the experimentation method in industries processes.…”

Section: Overview Of Awj Machining Of Frpsmentioning

confidence: 99%

Abrasive waterjet machining of fiber-reinforced composites: a state-of-the-art review

Thakur

Singh

2020

J Braz. Soc. Mech. Sci. Eng.

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Fiber-reinforced composites have established as a high-performance composite of modern advanced structures in various sectors such as automotive, aerospace, and marine industries. Non-conventional machining processes are preferred for the ease of manufacturing operations, which incorporates the machining of high strength and anisotropic material. Non-conventional manufacturing processes produce complicated shaped profiles and better surface characteristics. Abrasive water jet (AWJ) machining is an emerging technology that offers an excellent alternative among the various advanced machining processes due to its process capabilities and excellent machining quality. AWJ machining has fascinated immense attention in the fields of fiber-reinforced composite materials to produce intricate industrial components and attracted the researchers and production industries. It has become well-known in all key areas of researches. Over the past 30 years, lots of research work has been carried out to describe the machining performances among the studied process parameters. This paper reviews the research progresses and integrated functions of AWJ machining in terms of mechanism and machining performances, which includes aspects such as mathematical modeling and optimization. AWJ machining procedure and performance capability are reviewed and depicted in detail. Also, a comprehensive conclusion of this review, along with future perspective, is explored subsequently. The current review work will help future researchers for the proper selection of different FRP material composite compositions and AWJ machining parameters to achieve better performances. The collection of this review literature will also support the production operations in the future.

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Section: Overview Of Awj Machining Of Frpsmentioning

confidence: 99%

Abrasive waterjet machining of fiber-reinforced composites: a state-of-the-art review

Thakur

Singh

2020

J Braz. Soc. Mech. Sci. Eng.

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“…Also, they were converted into three different levels (-1, 0, 1) that represent minimum, central, and maximum values, respectively (Table 2). In order to establish a stand-off distance in accordance with the results of other authors [20,28,29], 2.5 mm was the stand-off distance used in all the tests. Figure 2 shows the distribution of 20 test.…”

Section: Reinforcementmentioning

confidence: 99%

“…This is mainly due to a loss of kinetic energy in the form of dispersion of the jet when leaving the focusing tube. Most studies indicate that a recommended distance is usually 2-3 mm [20,28,29].…”

Section: Introductionmentioning

confidence: 99%

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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“…The images show the influence of the opening of the jet at the entrance of the material producing an increase in the width of kerf. This phenomenon is related to damages produced in the IDR zone [23]. In order to obtain a more detailed microscopic analysis of the samples, images have been taken using SEM microscopy.…”

Section: Som/sem Evaluationmentioning

confidence: 99%

“…Finally, the state of the cuts has been evaluated through the use of microscopic inspection techniques and macro and microgeometric deviations. feed capacity (TFR), due to the influence analyzed in [23]. The separation distance has been kept constant at 3 mm throughout the experimental phase and the abrasive selected is garnet with an average particle size of 80 µm in order to optimize aluminium penetration [24].…”

Section: Introductionmentioning

confidence: 99%

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

García¹,

Mayuet²,

Salguero³

et al. 2018

Preprint

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The incorporation of plastic matrix composite materials into structural elements of the aeronautical industry requires contour machining and drilling processes along with metallic materials prior to final assembly operations. These operations are usually performed using conventional techniques, but they present problems derived from the nature of each material that avoid implementing One Shot Drilling strategies that work separately. In this work, the study focuses on the evaluation of the feasibility of Abrasive Waterjet Machining (AWJM) as a substitute for conventional drilling for stacks formed of Carbon Fiber Reinforced Plastic (CFRP) and aluminum alloy UNS A97050 through the study of the influence of abrasive mass flow rate, traverse feed rate and water pressure in straight cuts and drills. For the evaluation of the straight cuts, Stereoscopic Optical Microscopy (SOM) and Scanning Electron Microscopy (SEM) techniques are used inspection techniques have been used. In addition, the kerf taper through the proposal of a new method and the surface quality in different cutting regions have been evaluated. For the study of holes, the macrogeometric deviations of roundness, cylindricity and straightness have been evaluated. Thus, this experimental procedure reveals the conditions that minimize deviations, defects, and damage in straight cuts and holes obtained by AWJM.

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SOM/SEM based Characterization of Internal Delaminations of CFRP Samples Machined by AWJM

Cited by 47 publications

References 13 publications

Abrasive waterjet machining of fiber-reinforced composites: a state-of-the-art review

Abrasive waterjet machining of fiber-reinforced composites: a state-of-the-art review

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

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

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