Study of trimming damages of CFRP structures in function of the machining processes and their impact on the mechanical behavior

Haddad, Madjid; Zitoune, Rédouane; Bougherara, Habiba; Eyma, Florent; Castanié, Bruno

doi:10.1016/j.compositesb.2013.09.051

Cited by 142 publications

(97 citation statements)

References 34 publications

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“…Also due to matrix and fibre pull out, possiblities of delamination are more in machining with diamond edge cutter. Similar results have been observed by Haddad 10 , et al Figure 5 shows top and bottom kerf quality of AWJ machined samples. Kerf quality varies due to loss in kinetic energy of AWJ.…”

Section: Influence Of Process Parameters On Surface Roughness and Kersupporting

confidence: 79%

“…Some researchers have studied AWJM of composites mainly glass epoxy composite, graphite epoxy composite, natural fibre composite, and ceramic matrix composite through kerf properties such as surface roughness and kerf taper [4][5][6][7][8][9][10][11][12] and delamination 13,14 . An experimental study of AWJM of carbon epoxy composite to improve kerf properties is presented.…”

Section: Introductionmentioning

confidence: 99%

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Abrasive Water Jet Machining of Carbon Epoxy Composite

2016

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An experimental study of abrasive water jet machining of carbon epoxy composite is presented. Process parameters namely hydraulic pressure, traverse rate, stand-off distance and abrasive mass flow rate are considered for this study. Taguchi approach and analysis of variance are used to study the influence of process parameters on response characteristics including surface roughness and kerf taper. It is found that hydraulic pressure and traverse rate are most significant parameters to control surface roughness and kerf taper. Microscopic features of the machined surfaces are evaluated using scanning electron microscope and compared with sample surfaces machined by conventional method using diamond edge cutter.A set of process parameters is optimised to achieve minimum surface roughness and kerf taper. Confirmation tests are performed to verify the optimum set of process parameters. Defects like delamination, fibre pull out and abrasive embedment are also studied using scanning electron microscope.

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Section: Influence Of Process Parameters On Surface Roughness and Kersupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Abrasive Water Jet Machining of Carbon Epoxy Composite

2016

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“…In this work, the behavior of the cohesive interaction after damage onset was defined by Benzeggagh-Kenane (BK) model. 29 BK model is based on the energy dissipated due to failure considering a traction-separation response according to equation (2).…”

Section: Numerical Modellingmentioning

confidence: 99%

“…Machining-induced defects could affect the performance of the composite component or the mechanical joint during service life. [2][3][4] In fact a significant percentage of components rejection in aircraft manufacturing is due to machining-induced damage, mainly delamination between adjacent plies. This phenomenon has been extensively analyzed in the literature using different approaches (see for instance a recent review focusing on composite drilling 5 showing some techniques developed to minimize the occurrence of delamination).…”

Section: Introductionmentioning

confidence: 99%

Modelling thermal effects in machining of carbon fiber reinforced polymer composites

Santiuste

Díaz-Álvarez

Soldani

et al. 2013

Journal of Reinforced Plastics and Composites

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Machining-induced damage is commonly observed when manufacturing components based on carbon fiber reinforced polymer (CFRP) composites. Despite the importance of thermal effects in machining CFRPs, this problem has been poorly analyzed in the literature. Predictive tools are not available for thermal phenomena involved during cutting, while only few experimental studies have been found. In this paper, a three-dimensional (3D) finite element model of orthogonal machining of CFRPs including thermal effects is presented. Predicted thermal and mechanical intralaminar damage showed strong influence of fiber orientation. Thermally affected area was larger than mechanically damaged zone. This fact confirms the importance of accounting for thermal effects when modelling CFRP machining.

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“…This can also lead to an increased likelihood of other critical defects including un-cut fibres, fibre pull-out or delamination. Haddad et al [8], has demonstrated that various damage types, which are characteristics of a machined composite surface, can be correlated to mechanical performance. It is therefore important to be able to accurately quantify surface roughness to achieve an understanding of machining induced surface defects.…”

Section: Introductionmentioning

confidence: 99%

An optical method for measuring surface roughness of machined carbon fibre-reinforced plastic composites

Duboust

Ghadbeigi

Pinna

et al. 2016

Journal of Composite Materials

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Characterization of the damage induced by machining of fibre-reinforced composites is usually performed by measuring surface roughness. Contact-based surface profilometers are the most used equipment in industry; however, it has been found that there are performance limitations which may result when used to measure machined heterogeneous composite surfaces. In this research, surface roughness is characterised using a commercial non-contact optical method, and compared with a conventional stylus profilometer. Unidirectional and multidirectional carbon fibre laminates were edge trimmed and slot milled. The variation in surface roughness was compared using different tool types, fibre orientations and cutting parameters. Surface damage and cutting mechanisms were assessed by using scanning electron microscope images, and the suitability of roughness parameters were also analysed including: Sa, Skewness and Kurtosis. Using the optical system allowed accurate roughness calculation of individual plies on a multidirectional laminate with different fibre orientations. The research has also shown that the optical system, including the use of areal roughness parameters, can increase the accuracy of roughness measurement for machined fibrous composite surfaces and is less sensitive to measurement position than the stylus.

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Study of trimming damages of CFRP structures in function of the machining processes and their impact on the mechanical behavior

Cited by 142 publications

References 34 publications

Abrasive Water Jet Machining of Carbon Epoxy Composite

Abrasive Water Jet Machining of Carbon Epoxy Composite

Modelling thermal effects in machining of carbon fiber reinforced polymer composites

An optical method for measuring surface roughness of machined carbon fibre-reinforced plastic composites

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