Laser cutting of fibre-reinforced polyesters

Tagliaferri, V.; Ilio, A. Di; Visconti, L. Crivelli

doi:10.1016/0010-4361(85)90284-8

Cited by 139 publications

(47 citation statements)

References 2 publications

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“…Several non-traditional machining processes, i.e. laser-beam drilling [13][14][15], water-jet drilling (with or without abrasives) [16][17][18], ultrasonic drilling [19,20], electrical discharge machining (EDM) [21], have been reported as alternatives. Nevertheless, conventional drilling continues to be widely used for practical purpose.…”

Section: Introductionmentioning

confidence: 99%

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Tsao

Hocheng

2003

International Journal of Machine Tools and Manufacture

168

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Drilling-induced delamination often occurs both at the entrance and the exit of the workpiece during drilling of composite material. Investigators have studied analytically and experimentally that delamination in drilling can be correlated to the thrust force of the drill. With a pre-drilled pilot hole, the delamination can be reduced significantly. Early reference reported models of drilling-induced delamination, however, the effect of chisel edge length and pilot hole diameter on delamination is rarely discussed. The optimal range of chisel edge length with respect to drill diameter is derived in this paper. 

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Section: Introductionmentioning

confidence: 99%

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Tsao

Hocheng

2003

International Journal of Machine Tools and Manufacture

168

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“…From this standpoint, pulsed laser irradiation has recently been shown to be a very effective surface modification technique for a variety of materials. For instance, it can be used to improve adhesion between metals and epoxy resin [39,40], but also for precision material cutting and/or drilling [36] on a variety of materials including composites [59,54,43]. Moreover, it has been recently employed to enhance the tribological behavior of steel and diamond coatings [41,58].…”

Section: Introductionmentioning

confidence: 99%

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Almuhammadi

Selvakumaran

Alfano

et al. 2015

Applied Surface Science

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Laserbased surface preparation of composite laminates leads to improved electrodes for electrical measurements, Applied Surface Science (2015), http://dx.doi.org/10.1016/j.apsusc. 2015.10.086 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Page 1 of 32 A c c e p t e d M a n u s c r i p t AbstractElectrical impedance tomography (EIT) is a low-cost, fast and effective structural health monitoring technique that can be used on carbon fiber reinforced polymers (CFRP). Electrodes are a key component of any EIT system and as such they should feature low resistivity as well as high robustness and reproducibility. Surface preparation is required prior to bonding of electrodes. Currently this task is mostly carried out by traditional sanding. However this is a time consuming procedure which can also induce damage to surface fibers and lead to spurious electrode properties. Here we propose an alternative processing technique based on the use of pulsed laser irradiation. The processing parameters that result in selective removal of the electrically insulating resin with minimum surface fiber damage are identified.A quantitative analysis of the electrical contact resistance is presented and the results are compared with those obtained using sanding.

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“…Thermal properties of the fibers and matrix were the principal factors, which affected cutting performance [21]. The optimum performance in laser drilling depended very much upon the proper selection of laser parameters as well as the physical properties of the workpiece material [5].…”

Section: Materials Parametersmentioning

confidence: 99%

“…Tagliaferri [19][20][21] conducted an experimental study to determine the surface finish characteristics of CFRP and AFRP by CO 2 laser. The heataffected zone (HAZ) depends strictly on feed rate.…”

Section: Laser-induced Hazmentioning

confidence: 99%

Laser Machining and its Associated Effects

Pan

Hocheng

2012

Advanced Analysis of Nontraditional Machining

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Laser machining has a wide range of industrial applications. However, laser energy can cause thermal damage to composite materials during the shaping operation following curing. Such damage leads to poor assembly tolerances and reduces long-term performance. In this study, we investigated the laser machininginduced formation of anisotropic heat-affected zones (HAZs) in fiber-reinforced plastics (FRP). The degree of HAZ is estimated by the isotherm of the matrix char temperature. Analysis revealed that both the laser energy per unit length and the fiber orientation-dependent thermal conductivity are key factors in determining the extent of HAZ. An experimental measurement of anisotropic thermal conductivity for composite materials is developed. Heat conduction is greater along fibers than it is across a fiber section, thus laser scanning direction relative to fiber orientation affects the HAZ geometry. The study also investigated the principalaxis and nonprincipal-axis grooving of unidirectional (UD), [0/90], Mat, and MatUD laminates. An analytical model based on a moving point heat source using the Mirror Image Method and immersed heat source to model principalaxis grooving is adopted to correlate HAZ anisotropy with various process parameters. Finite difference method (FDM) with an isotherm conductivity model and eigenvalue method is applied to simulate the HAZ resulting from nonprincipalaxis grooving.

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Laser cutting of fibre-reinforced polyesters

Cited by 139 publications

References 2 publications

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Laser-based surface preparation of composite laminates leads to improved electrodes for electrical measurements

Laser Machining and its Associated Effects

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