Effect of drilling parameters on the finish and mechanical properties of GFRP composites

Tagliaferri, V.; Caprino, G.; Diterlizzi, A

doi:10.1016/0890-6955(90)90043-i

Cited by 179 publications

(104 citation statements)

References 3 publications

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“…The results discussed in [28] show that static tensile strength of specimens with a hole is not affected by drilling conditions and consequently by damage, whereas a strong decrease in bearing strength could be observed as the damage around is increased.…”

Section: Static and Fatigue Resistancementioning

confidence: 91%

“…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. Moreover, a scanning electron microscope can be used to observe the cut surface morphology [28,29]. There are various methods for delamination evaluation.…”

Section: Damage Evaluation Methodsmentioning

confidence: 99%

“…Furthermore, Tagliaferri et al [28] indicate that the GFRP damage depends on the ratio between rotation speed and feed rate, irrespective of reinforcement form, resin type and fabrication method.…”

Section: Delaminationmentioning

confidence: 99%

“…Some mechanical tests both under static and cyclic load conditions are proposed in the literature to evaluate these relationships [28,38,49].…”

Section: Residual Mechanical Propertiesmentioning

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%

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Drilling Polymeric Matrix Composites

et al.

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Section: Static and Fatigue Resistancementioning

confidence: 91%

Section: Damage Evaluation Methodsmentioning

confidence: 99%

Section: Delaminationmentioning

confidence: 99%

“…Some mechanical tests both under static and cyclic load conditions are proposed in the literature to evaluate these relationships [28,38,49].…”

Section: Residual Mechanical Propertiesmentioning

confidence: 99%

Section: 1 Structural Damagementioning

confidence: 99%

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Drilling Polymeric Matrix Composites

et al.

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Experimental Study of Influence of Drilling Parameters on Delamination in Drilling Aircraft CFRP Composites Using DOE (Taguchi Method)

Kashikar

Patil

Kalkar³

2022

Optimization of Industrial Systems

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Interaction between laminate quality, drilling‐induced delamination and mechanical properties in machining of carbon fibre reinforced plastic (CFRP)

Haeger

Meinhard

Lissek

et al. 2016

Materialwissenschaft Werkst

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In the presented study, the effect of the microstructural quality of carbon fibre reinforced plastic laminates on their machinability is investigated. Additionally, the impact of processing induced porosity and the effect of machining caused delamination on the static strength of the carbon fibre reinforced plastic laminates is examined under variable mechanical loading conditions such as bending, shearing, bearing or tension. Therefore, carbon fibre reinforced plastic laminates based on the advanced carbon/epoxy prepreg T800S/M21 manufactured by Hexcel were cured in two different ways leading to obvious differences in the corresponding microstructural quality. Drilled test specimens with a wide range of typical delamination around the hole have been gained from wear studies of carbide tools. The delamination was quantitatively determined by means of optical inspection techniques. Afterwards, the influence of the loading situation as well as the effect of the laminate orientation on the mechanical strength of the laminates was investigated. The microstructural quality of the carbon fibre reinforced plastic laminates was found to have an obvious influence on matrix dominated mechanical properties such as the apparent interlaminar shear strength. Furthermore, it significantly influences the machinability of the laminate – the porous carbon fibre reinforced plastic tends much more to delaminate than the compact one. In general, the influence of both, porosity and delamination, on static strength strongly depends on the mechanical loading situation. No recognisable effect can be detected for fibre dominated properties like tensile strength. However, for example in bending tests carbon fibre reinforced plastic laminates typically fail due to delamination on the compressive side of the specimen. Under such loading situations the described defects significantly reduce the strength. The reduction in flexural strength after machining is more severe if longitudinally oriented fibres are delaminated at the surface. On the other hand, transversal oriented top plies, which do not significantly contribute to the strength of the laminate, are not as critical as the corresponding longitudinal ones. Thus, it can be concluded that the machining caused defect sensitivity of carbon fibre reinforced plastic laminates strongly depends on their lay‐up and the loading situation.

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Effect of drilling parameters on the finish and mechanical properties of GFRP composites

Cited by 179 publications

References 3 publications

Drilling Polymeric Matrix Composites

Drilling Polymeric Matrix Composites

Experimental Study of Influence of Drilling Parameters on Delamination in Drilling Aircraft CFRP Composites Using DOE (Taguchi Method)

Interaction between laminate quality, drilling‐induced delamination and mechanical properties in machining of carbon fibre reinforced plastic (CFRP)

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