A novel approach based on digital image analysis to evaluate the delamination factor after drilling composite laminates

Davim, J. Paulo; Rubio, Juan Carlos Campos; Abrão, Alexandre Mendes

doi:10.1016/j.compscitech.2006.10.009

Cited by 448 publications

(272 citation statements)

References 11 publications

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“…Tears and burrs are mainly located on the outer layer of the surface. They are the most common machining defects of CFRPs [29,31]. Tears are caused by milling force and extend along the fiber direction of the outer layer.…”

Section: Analysis Of Machining Defectsmentioning

confidence: 99%

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Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

et al. 2017

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Machined surface quality determines the reliability, wear resistance and service life of carbon fiber reinforced plastic (CFRP) workpieces. In this work, the formation mechanism of the surface topography and the machining defects of CFRPs are proposed, and the influence of milling parameters and fiber cutting angles on the surface quality of CFRPs is obtained, which can provide a reference for extended tool life and good surface quality. Trimming and slot milling tests of unidirectional CFRP laminates are performed. The surface roughness of the machined surface is measured, and the influence of milling parameters on the surface roughness is analyzed. A regression model for the surface roughness of CFRP milling is established. A significance test of the regression model is conducted. The machined surface topography of milling CFRP unidirectional laminates with different fiber orientations is analyzed, and the effect of fiber cutting angle on the surface topography of the machined surface is presented by using a digital super depth-of-field microscope and scanning electron microscope (SEM). To study the influence of fiber cutting angle on machining defects, the machined topography under different fiber orientations is analyzed. The slot milling defects and their formation mechanism under different fiber cutting angles are investigated.

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Section: Analysis Of Machining Defectsmentioning

confidence: 99%

“…Tensile fracture topography along the axial direction is seen. Due to workpiece clamping, fiber ply and tool vibration, the fiber cutting angle cannot be completely zero [21,29]. The actual milling is machining with a small fiber cutting angle.…”

Section: Surface Topographymentioning

confidence: 99%

Surface Quality of Staggered PCD End Mill in Milling of Carbon Fiber Reinforced Plastics

et al. 2017

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“…Furthermore, this procedure does not indicate the damage area. A novel approach devised to measure the delamination factor was proposed by Davim et al [7], namely the adjusted delamination factor, and calculated through Eq. (2).…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of GFRP laminates subjected to compression after drilling

Karimi

Heidary

Fotouhi

et al. 2017

Composite Structures

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“…Different techniques and parameters can be used to assess the damage caused by drilling [27,33,39,40]. Sophisticated non-destructive techniques can be employed in addition to low-magnification microscopy in order to identify internal defects, while destructive techniques are rarely employed.…”

Section: Damage Evaluation Methodsmentioning

confidence: 99%

“…The presence and extension of the different kinds of damage depend on the composite material characteristics, tool geometry and material, and the process parameters [27][28][29][30][31][32][33][34][35][36]. The damage is particularly detrimental to the residual mechanical properties and significantly reduces the composite performance in use.…”

Section: 1 Structural Damagementioning

confidence: 99%