Delamination measurement in glass fibre reinforced polymer (GFRP) composite based on image differencing

Lukács, Tamás; Pereszlai, Csongor; Geier, Norbert

doi:10.1016/j.compositesb.2022.110381

Cited by 13 publications

(3 citation statements)

References 53 publications

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“…All drilling tests were conducted without coolant using spindle speeds of 800~1,200 rpm and feed rates of 8~12 mm/min. Digital image processing (DIP) algorithm is used to determine the maximum diameter of a delamination and to detect edges on the composite material [17][18][19][20][21]. Most studies use DIP to determine delamination at the hole is greater without a suppression device than with a suppression device, so measurement is difficult.…”

Section: Cutting-edge Wear (T Cs )mentioning

confidence: 99%

“…Most studies use DIP to determine delamination at the hole is greater without a suppression device than with a suppression device, so measurement is difficult. Lukács et al showed that an equivalent delamination factor ( ed F ) gives the most accurate results at the hole exit [21]. The value of a for ed F is calculated as [20]:…”

Section: Cutting-edge Wear (T Cs )mentioning

confidence: 99%

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Theoretical and experimental study of tool wear using active backup force for drilling composite materials

Liao,

Tsao

2023

Int J Adv Manuf Technol

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The advent of composite materials has allowed for the state-of-the-art fabrication of structural parts with delamination-free holes. These are widely used polymers in aerospace, military and biomedical devices. Fabricating a delamination-free hole using a traditional twist drill is fast and cost-effective but the surface roughness depends on the drilling parameters, the tool geometry and the tool material. However, tool wear is inevitable when machining composite materials. It reduces the service life of the tool and affects the surface quality and the dimensional accuracy of structural parts. A mechanical and energy analysis is used to develop a mathematical model for the critical thrust force to correlate tool wear and the associated active backup force for drilling composite materials. The theoretical analysis and experimental results show that delamination due to worn twist drills is mitigated by using an active backup force. The developed model is extended to determine the effect of tool wear and an active backup force on the thrust force for future drill bits.

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Section: Cutting-edge Wear (T Cs )mentioning

confidence: 99%

Section: Cutting-edge Wear (T Cs )mentioning

confidence: 99%

Theoretical and experimental study of tool wear using active backup force for drilling composite materials

Liao,

Tsao

2023

Int J Adv Manuf Technol

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“…Marine and piping industries, aircraft industries such as rudder, elevator, door landing gear, etc as well as automobile and sport industries. 2 The poor interfacial bonding between the phases of GFRP composite restricts its broader utilization in engineering applications. This is because it can lead to delamination, burrs, fiber pull-outs, matrix spreading, poor machining, and cracking when subjected to load.…”

Section: Introductionmentioning

confidence: 99%

Investigating the role of synthesized reduced graphene oxide and graphite micro-fillers on mechanical and fretting wear performance of glass fiber epoxy-based composite

Singh,

Nayak,

Singh

et al. 2023

High Performance Polymers

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In the current study, graphite was exfoliated using a Hummer’s technique to produce graphene oxide (GO), which was then reduced with hydrazine hydrate (a reducing agent) to produce reduced graphene oxide (rGO) with high purity. The XRD, FT-IR, SEM, and TGA analysis confirmed the synthesis of rGO by stating its crystal phase, chemical functional group, morphology, and thermal stability. The objective of this study is twofold: firstly, to synthesize the reduced graphene oxide (rGO) cost-effectively, and secondly, to explore its potential as an additional filler in Glass Fiber Reinforced Polymer (GFRP) composites. Aiming to enhance their overall performance. The GFRP laminate composite was fabricated through the hand layup technique by varying the concentration of Gr (i.e., 0.5 wt% & 1 wt%) and rGO (i.e., 0.5 wt% & 1 wt%). The morphological study of the fracture surface revealed a proper dispersion of filler obtained at 0.5 wt% and by increasing the concentration to 1 wt% it reveals a clustering of fillers and formation of micro-voids. The result revealed that maximum improvement has been observed in the GFRP composite having 0.5 wt% rGO composite than neat GFRP composite. Incorporation of rGO micro-filler in GFRP laminate composite significantly improved the tensile strength, flexural strength, and in their modulus by 59.56%, 18.21%, 24.45%, and 22.75% respectively compared to neat GFRP laminate composite. In the case of 0.5 wt% graphite filler demonstrates an enhancement in tensile strength, flexural strength, and their modulus by 37.98%, ∼8%, 6.64%, and ∼5% respectively. In fretting wear test reveals that 1 wt% of graphite filler has better wear resistance than all other composites. The worn morphology revealed adhesive and abrasive wear as the predominant wear mechanism. The incorporation of rGO filler in GFRP makes it a promising material for industrial applications that demand high strength and superior wear resistance.

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Defect measurement in CFRP drilling based on digital image processing

Zhang

Huang

et al. 2023

Int J Adv Manuf Technol

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Carbon Fiber Reinforced polymers (CFRPs) are critical kind of materials in many industries due to their superior mechanical and physical properties. However, the pivotal mechanical process of CFRPs is considered to be drilling, which easily leads to CFRPs defects including burr and delamination. Although substantial CFRPs defect inspection methods have been suggested, the user-friendly measurement of CFRPs defects and fast measurement speed are still challenging. To this end, a digital-image-processingbased method for identifying and measuring the drilling-induced defects in CFRPs specimens is proposed. By comparing with the manually measured results, it shows that the proposed method can accurately (the maximal relative errors are separately 5.76% and 3.42% for burr factor and delamination factor) and quickly (4 s per micrograph) recognize and measure CFRPs defects. Moreover, the method has no requirement for adjusting any parameters manually and shows strong robustness to the interference from the bright noise. Based on above, the method is anticipated to provide a meaningful reference for recognizing and measuring CFRPs defects in large quantities.

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Delamination measurement in glass fibre reinforced polymer (GFRP) composite based on image differencing

Cited by 13 publications

References 53 publications

Theoretical and experimental study of tool wear using active backup force for drilling composite materials

Theoretical and experimental study of tool wear using active backup force for drilling composite materials

Investigating the role of synthesized reduced graphene oxide and graphite micro-fillers on mechanical and fretting wear performance of glass fiber epoxy-based composite

Defect measurement in CFRP drilling based on digital image processing

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