Evolution laws of fiber-matrix interface cracks in machining of carbon fiber reinforced polymer

Wang, Fuji; Zhang, Bo-yu; Zhao, Meng; Cheng, Dong; Wang, Ze-gang

doi:10.1007/s00170-018-2992-8

Cited by 16 publications

(7 citation statements)

References 28 publications

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“…The hybrid materials exhibit brittle fracture behavior at low cutting speeds that affects their machinability, but medium cutting speed influences the process. The fiber experiences a high strain rate under a high cutting speed, causing it to fail at a lower strain or in a brittle form [29]. It raises the strain rate leading to low-stress fractures and material degradation, thereby increasing the cutting region's temperature and improving the composite's molecular ductility.…”

Section: Influence Of Process Parameters On Cutting Forcementioning

confidence: 99%

“…However, the heat produced can increase the cutting zone's temperature with a higher combination of feed and cutting speed, increasing the material's molecular chains' long-range mobility, thus increasing its ductility. In this way, the fracture of fibers tends to increase, causing more severe damage [29]. At the higher cutting speed and feed rate, the chip microstructure is prominent in the long continuous carbon fiber strands' instantaneous fracturing, demonstrating substantial fiber crack propagation on the chip at intermittent lengths.…”

Section: Influence Of Process Parameters On Milling-induced Delaminationmentioning

confidence: 99%

“…This would be due to the lack of bending of the cutting tool, which is accomplished by decreasing the cutting force, smooth discharge of the chip when the cutting speed of the cutting chips exceeds the cutting speed; and a decrease in uncut fiber yarn burrs [19,33]. However, with increased depth of cut, extensive machining surface damage, higher fiber pull can be confirmed of epoxy/CFRP composite [29]. In addition, the damage caused by improved mechanical properties and microstructure is diminished by loaded nanofiller samples [34].…”

Section: Influence Of Process Parameters On Milling-induced Delaminationmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation on Machine-Induced Damages during the Milling Test of Graphene/Carbon Incorporated Thermoset Polymer Nanocomposites

Kumar

Abhishek

et al. 2022

J. Compos. Sci.

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The fiber laminate composites are extensively used in aerospace, aircraft, automotive components due to their high stiffness, corrosion, moisture resistance, low weight, and durability features. These fiber composites are modified with nanomaterials to acquire the desired manufacturing properties. The complex structure and anisotropic features differ from metals and their alloys. Additionally, the machining principles of fiber laminates significantly differ from conventional engineering materials. The present work investigates the machining behavior and permeates the damage generated while milling of graphene-modified carbon-fiber reinforced polymer nanocomposites (G/C@FRNC). The surface damages and defects caused in the milling samples have been examined through the high-resolution spectroscopy test. The influence of machining constraints such as cutting speed (N), feed rate (F), depth of cut (D), and graphene oxide weight % (GO) has been investigated to achieve the desired milling performances viz. material removal rate (MRR), cutting force (Fc), surface roughness (Ra), and delamination factor (Fd). The outcomes indicated that the cutting parameters and graphene nanomaterial prominently affects the milling responses. The addition of graphene improves the machinability of proposed nanocomposites with lesser defects generated. However, its higher addition can lead to the phenomenon of agglomeration that can reduce the machining efficiency. The damages and delamination generated in the machined sample are low at a higher cutting speed. This work suggests a new system to control the damage and defects to enhance the laminate samples’ quality and productivity.

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Section: Influence Of Process Parameters On Cutting Forcementioning

confidence: 99%

Section: Influence Of Process Parameters On Milling-induced Delaminationmentioning

confidence: 99%

Section: Influence Of Process Parameters On Milling-induced Delaminationmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation on Machine-Induced Damages during the Milling Test of Graphene/Carbon Incorporated Thermoset Polymer Nanocomposites

Kumar

Abhishek

et al. 2022

J. Compos. Sci.

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“…They confirmed that the milling defects were generated based on the direction of fiber. Wang et al [11] revealed the evolution laws of the fiber-matrix interface crack. They demonstrated that there were four evolution types.…”

Section: Introductionmentioning

confidence: 99%

Study On The Formation Mechanism of Cutting Surface of Carbon Fiber Reinforced Composites

Dong

et al. 2021

Preprint

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Carbon fiber-reinforced plastic (CFRP) is used widely in aerospace. The cutting mechanism of CFRP is markedly different from that of metals due to anisotropic and non-homogeneous material structure. The cutting mechanisms are highly dependent on the fiber orientation. The quality of the machined surface can be affected by the fiber fracture models. In this paper, based on the elastic foundation beam theory and the Hertzian contact theory, the cutting mechanics are established. And the cutting model is simulated by the three-dimensional micro-scale numerical model. Then, the continuous varying cutting mechanism and the sub-damage are deeply studied in detail by combining the cutting mechanics model and the simulation model. The results indicate that the fiber orientation θ=80° and θ=150° is the transition critical point of the fracture form. When θ=0°, the fiber failure mode is buckling-dominated. When 0°<θ<80° and 150°<θ<180°, the fiber failure mode is dominated by contact fracture. When 80°<θ<150°, the fiber failure mode is bending-dominated. The cutting mechanics model and finite element model can effectively reflect the evolution law of CFRP machined surface.

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“…1. The influence of fiber cutting angle has been widely investigated by many researchers [6,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] in order to describe chip removal mechanisms in unidirectional CFRP.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Characteristics of Surface Roughness of Machined CFRP Composites

Geier

Pereszlai

2019

Period. Polytech. Mech. Eng.

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Measuring and characterizing of surface roughness of machined surfaces of carbon fiber reinforced polymer (CFRP) composites are difficult due to the occurrence of special surface damages (delamination, uncut fibers, fiber pull-outs or micro-cracks, etc.). The main objective of the present study is to analyze the characteristics of surface roughness of machined unidirectional CFRP in detail. Numerous conventional drilling, helical milling, and edge trimming experiments were carried out with different cutting tools in order to analyze the influence of them on the average surface roughness (Ra), on the roughness depth (Rz) and on the Rz /Ra parameter. The surface roughness was measured by a Mitutoyo SJ-400 contact profilometer and an Alicona Infinite Focus confocal microscope. The usability of the contact profilometer was experimentally tested and compared its results with the results of the confocal microscope. Experimental results show that the contact profilometer is suitable for measuring surface roughness of CFRP, furthermore, values of Rz /Ra of drilled and edge trimmed surfaces of unidirectional CFRP are changing in a wide interval: from 5 to 14 μm/μm due to the special surface damages. Based on this research, the machinability analysis of CFRP is suggested to be extended to the analysis of the Rz /Ra parameter.

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Evolution laws of fiber-matrix interface cracks in machining of carbon fiber reinforced polymer

Cited by 16 publications

References 28 publications

Experimental Investigation on Machine-Induced Damages during the Milling Test of Graphene/Carbon Incorporated Thermoset Polymer Nanocomposites

Experimental Investigation on Machine-Induced Damages during the Milling Test of Graphene/Carbon Incorporated Thermoset Polymer Nanocomposites

Study On The Formation Mechanism of Cutting Surface of Carbon Fiber Reinforced Composites

Analysis of Characteristics of Surface Roughness of Machined CFRP Composites

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