Temperature Measurements for the Tool Wear and Hole Quality Assessment During Drilling of CFRP/CFRP Stacks

Angelone, Roberta; Caggiano, Alessandra; Improta, Ilaria; Nele, Luigi; Teti, Roberto

doi:10.1016/j.procir.2017.12.235

Cited by 15 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, the heat quantity generated at the Ti volume acts as a heat source to keep temperature at the frontier as high as possible while the CFRP free surface seems to favor heat loss and create The chip generated from the CFRP phase does not appear because the "element deletion" option was used to simulate the material removal process when any of the damage criteria defined above (Table 1) were reached. However, the cutting process yields a continuous chip from the Ti phase which fits with the physical mechanisms widely observed when cutting titanium [17][18][19][20]. When investigating the predicted fields at the CFRP interface side, it can be pointed out that even after tool passage, temperature still localizes at relatively high values along the trim plane-to-interface common edge.…”

Section: 𝜃 = 0°supporting

confidence: 70%

Towards an Advanced Modeling of Hybrid Composite Cutting: Heat Discontinuity at Interface Region

et al. 2023

View full text Add to dashboard Cite

In this study, a thermomechanical model is developed to simulate a finite drilling set of Carbon Fibre Reinforced Polymers (CFRP)/Titanium (Ti) hybrid structures widely known for their energy saving performance. The model applies different heat fluxes at the trim plane of the two phases of the composite, owing to cutting forces, in order to simulate the temperature evolution at the workpiece during the cutting step. A user-defined subroutine VDFLUX was implemented to address the temperature-coupled displacement approach. A user-material subroutine VUMAT was developed to describe Hashin damage-coupled elasticity model for the CFRP phase while Johnson–Cook damage criteria was considered for describing the behavior of titanium phase. The two subroutines coordinate to evaluate sensitively the heat effects at the CFRP/Ti interface and within the subsurface of the structure at each increment. The proposed model has been first calibrated based on tensile standard tests. The material removal process was then investigated versus cutting conditions. Predictions show discontinuity in temperature field at interface that should further favor damage to localize especially at CFRP phase. The obtained results highlight the significant effects of fibre orientation in dominating cutting temperature and thermal effects over the whole hybrid structure.

show abstract

Section: 𝜃 = 0°supporting

confidence: 70%

Towards an Advanced Modeling of Hybrid Composite Cutting: Heat Discontinuity at Interface Region

et al. 2023

View full text Add to dashboard Cite

show abstract

“…26 Push-out delamination size can reach up to 2-3 times that of hole size [27][28][29][30] and has been shown to reduce bending strength by up to 20% in CFRP 28 and tensile strength by up to 10% in GFRP. 31 The temperatures during dry drilling actions in fibre reinforced laminates are observed to be high, due to the poor thermal conductivity of the matrices 19,[32][33][34][35][36] and have been shown to increase with tool wear (CER). 24,37 In most cases temperatures have exceeded the matrix glass transition temperature (tg), which reduces interlaminar strength (reducing critical load for push-out delamination) and reduces support for fibres being cut (increasing fibre pull out and fibre bending).…”

Section: Tool Wearmentioning

confidence: 99%

Monitoring the drilling process of carbon fibre laminates using acoustic emission

Eaton

Crivelli

Williams

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

This work aims to apply Acoustic Emission to monitor the drilling process in carbon fibre laminates. Continuous Acoustic Emission data is captured over the entire drilling process of a through hole. The use of continuous acoustic emission data acquisition allows the identification of lower frequency periodic temporal features related to the cutting process. A new approach to data analysis is presented that utilises an enveloping technique to study these periodic phenomena and show that they correlate to changes in cutting regime as tool wear advances and hole quality reduces. This analysis of Acoustic Emission data is supported by the measurement of tool temperature, thrust force and the assessment of hole quality. Results show that Acoustic Emission activity is correlated to changes in the cutting process, and a correlation between tool wear and Acoustic Emission is observed. This correlation has been confirmed by corresponding increases in thrust force and drill temperature, with a consequent decrease in the observed hole quality.

show abstract

“…The larger the cutting speed, the worse the R a and R z parameters are in both composites. The higher speeds often result in higher cutting power and, therefore, in higher cutting temperatures; thus, there is a possibility that the matrix is more likely to plastically deform and smear instead of being cut [39]. Furthermore, the surface was rougher in the BFRP than in the CFRP.…”

Section: Surface Roughnessmentioning

confidence: 99%

Analysis of drilling-induced geometrical damages in basalt and carbon fibre-reinforced polymer (BFRP and CFRP) composites

Magyar

Károly

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Basalt fibre-reinforced polymer (BFRP) composites probably tend to replace some carbon fibre-reinforced polymer (CFRP) applications due to their excellent specific strengths and sustainability. Despite the published early promising results concerning the material properties of BFRP, their application is not widespread, and their machinability is not supported widely by published experiences. The main aim of the present study is to experimentally investigate the drilling-induced geometrical damages of BFRP and CFRP composites. Drilling experiments were conducted at various feed and cutting speed levels using a solid carbide twist drill. The drilling-induced burr was analysed by a Mitutoyo 361–804 digital microscope, a Mitutoyo SJ400 surface tester recorded the surface roughness, and the microstructure was analysed by a Zeiss Evo MA 10 scanning electron microscope. The measured data were evaluated through digital image processing (DIP), response surface methodology (RSM), and analysis of variances (ANOVA). The experimental results show that drilling-induced burr is more severe and surface roughness is worse in BFRP than in CFRP. The composite type influenced the geometrical damages primarily, followed by the feed in the case of burrs and by the cutting speed in the case of surface roughness. The present experimental study suggests that the drilling of BFRP is even more challenging than drilling CFRP from the point of view of burr formation and micro geometrical properties.

show abstract

Temperature Measurements for the Tool Wear and Hole Quality Assessment During Drilling of CFRP/CFRP Stacks

Cited by 15 publications

References 13 publications

Towards an Advanced Modeling of Hybrid Composite Cutting: Heat Discontinuity at Interface Region

Towards an Advanced Modeling of Hybrid Composite Cutting: Heat Discontinuity at Interface Region

Monitoring the drilling process of carbon fibre laminates using acoustic emission

Analysis of drilling-induced geometrical damages in basalt and carbon fibre-reinforced polymer (BFRP and CFRP) composites

Contact Info

Product

Resources

About