Determination of the interfacial properties of carbon fiber reinforced polymers using nanoindentation

2021 ◽  
pp. 073168442110635
Author(s):  
Jing Zhu ◽  
Feng C Lang ◽  
Shi Y Wang ◽  
Zhuo Li ◽  
Yong M Xing
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Surface Topography ◽  
Mechanical Performance ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
The Matrix ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced ◽  
Continuous Stiffness Measurement

The mechanical properties of the interphase play a key role in determining the overall performance of carbon fiber reinforced polymer (CFRP) composite materials. For this reason, it is important to develop a method to easily and precisely investigate the mechanical performance of the interphase of CFRP materials. In this work, the surface topography of the CFRP material was examined using scanning probe microscopy (SPM), which revealed the polished flat sample can meet the requirements of the nanoindentation testing. The local mechanical performance of the interphase of the CFRP was determined using nanoindentation based on the continuous stiffness measurement (CSM) method. The results show that the size of the interphase between the carbon fiber and the matrix is about 1.5 μm, and the corresponding modulus and hardness values were estimated to be 5–11 and 0.4–3.3 GPa, respectively, considering the fiber-bias effects. Mapping of the local mechanical properties of a selected area revealed that nanoindentation reproduced excellently the surface topography and characterized precisely the properties of the interphase between the carbon fibers and the matrix.

Effects of Adding SiC Powder on the Properties of Carbon Fiber Reinforced Si-O-C Composites Fabricated via Precursor Pyrolysis

2010 ◽  
Vol 434-435 ◽  
pp. 54-56 ◽  
Author(s):  
Jing Yu Liu ◽  
Ke Jian ◽  
Zhao Hui Chen ◽  
Zhi Wei Fang ◽  
Xia Hui Peng
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Low Cost ◽  
Weight Percent ◽  
Silicon Oxycarbide ◽  
Fiber Reinforced ◽  
The Matrix ◽  
Oxidation Properties ◽  
Carbon Fiber Reinforced

Three dimensional carbon fiber reinforced silicon oxycarbide (3D Cf/Si-O-C) composites with low cost silicon resin as precursors and 3D Cf as reinforcement. Effects of adding SiC powder (SiCP) on the microstructure, mechanical properties and anti-oxidation properties of 3D Cf/Si-O-C composites were investigated. The results showed that adding SiCP filler could reduce the porosity and improve the interface bonding, therefore the properties of composites increased. But when the SiCP content was excessive, it was difficult to dense the matrix of composites at the further cycles and pores existed in the matrix. As a result, the mechanical properties of the composites decreased. It was found that when fabricated with 18.2 weight percent SiCP the composites exhibited highest mechanical properties, and the flexural strength and fracture toughness reached 421.3MPa and 13.0 MPa•m1/2, respectively. And the anti-oxidation properties were improved with the increase of the SiCP content. When fabricated with 25.0 weight percent SiCP the composites exhibited best oxidation resistance properties, and the composites retained 89.5% of original flexural strength.

Additive Manufacturing of Continuous Carbon Fiber Reinforced Thermoplastic Composites: An Investigation on Process-Impregnation-Property Relationship

2020 ◽  
Author(s):  
Gongshuo Wang ◽  
Zhenyuan Jia ◽  
Fuji Wang ◽  
Chuanhe Dong ◽  
Bo Wu
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Carbon Fiber ◽  
Process Parameters ◽  
Mechanical Performance ◽  
Movement Speed ◽  
Fiber Reinforced ◽  
Influence Of Process Parameters ◽  
Continuous Carbon Fiber ◽  
Carbon Fiber Reinforced

Abstract Fused filament fabrication (FFF) is one of the most broadly used additive manufacturing technologies, which possesses the advantage of a reduction in fabrication time and cost for complex-structural parts. FFF-fabricated continuous carbon fiber reinforced thermoplastic (C-CFRTP) composites have seen their great potentials in the industry due to the extraordinary mechanical properties. However, the relationship among process parameters, impregnation percentage, and mechanical properties is still unknown, which has greatly hindered both the manufacturing and application of those advanced composite parts. For this reason, the influence of process parameters on the impregnation percentage and mechanical properties of C-CFRTP specimens has been investigated in this paper. The process-impregnation-properties relationship of FFF-fabricated C-CFRTP specimens has been revealed through theoretical analyses and experimental measurement. It could be concluded that the impregnation percentage served as the bridge connecting process parameters and mechanical properties, which would provide a great insight into the property improvement. The experimental results of microscopic measurement and mechanical tests indicated that the combination of low transverse movement speed, high nozzle temperature, and small layer thickness led to an improved impregnation percentage, which ultimately produced better mechanical properties. The findings in this work will guide the fabrication of C-CFRTP parts with excellent mechanical performance for practical engineering applications.

scholarly journals Fabrication and Characterization of Carbon-Fiber-Reinforced Polymer–FeSi Composites with Enhanced Magnetic Properties

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2325
Author(s):  
Alexandre Tugirumubano ◽  
Sun Ho Go ◽  
Hee Jae Shin ◽  
Lee Ku Kwac ◽  
Hong Gun Kim
Keyword(s):  
Tensile Strength ◽  
Magnetic Properties ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Magnetic Composites ◽  
Carbon Fiber Reinforced Polymers ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced

In this work, we aimed to manufacture and characterize carbon-fiber–polymer–metal-particles magnetic composites with a sandwichlike structure. The composites were manufactured by stacking the plain woven carbon fiber prepregs (or carbon-fiber-reinforced polymers (CFRP)) and layers of the FeSi particles. The layer of FeSi particles were formed by evenly distributing the FeSi powder on the surface of carbon fiber prepreg sheet. The composites were found to have better magnetic properties when the magnetic field were applied in in-plane (0°) rather than in through-thickness (90°), and the highest saturation magnetization of 149.71 A.m2/kg was achieved. The best inductance and permeability of 12.2 μH and 13.08 were achieved. The composites obviously exhibited mechanical strength that was good but lower than that of CFRP composite. The lowest tensile strength and lowest flexural strength were 306.98 MPa and 855.53 MPa, which correspond to 39.58% and 59.83% of the tensile strength and flexural strength of CFRP (four layers), respectively.

scholarly journals Recent Progress in Carbon Fiber Reinforced Polymers Recycling: A Review of Recycling Methods and Reuse of Carbon Fibers

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6401
Author(s):  
José Antonio Butenegro ◽  
Mohsen Bahrami ◽  
Juana Abenojar ◽  
Miguel Ángel Martínez
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Waste Recycling ◽  
Fiber Reinforced Polymers ◽  
Chemical Recycling ◽  
Fiber Reinforced ◽  
Mechanical Recycling ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced

The rapid increase in the application of carbon fiber reinforced polymer (CFRP) composite materials represents a challenge to waste recycling. The circular economy approach coupled with the possibility of recovering carbon fibers from CFRP waste with similar properties to virgin carbon fibers at a much lower cost and with lower energy consumption motivate the study of CFRP recycling. Mechanical recycling methods allow the obtention of chopped composite materials, while both thermal and chemical recycling methods aim towards recovering carbon fibers. This review examines the three main recycling methods, their processes, and particularities, as well as the reuse of recycled carbon fibers in the manufacture of new composite materials.

scholarly journals A novel arch-shaped hybrid composite triboelectric generator using carbon fiber reinforced polymers

2019 ◽  
Author(s):  
Chris Bowen
Keyword(s):  
Carbon Fiber ◽  
Copper Electrode ◽  
Fiber Reinforced Polymers ◽  
Energy Sources ◽  
Fiber Reinforced ◽  
Engineering Structures ◽  
Lower Electrode ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced ◽  
Self Powered

With the diminution of the energy sources and the need for using cleaner energy, alternatives must be found. In addition, the desire for energy sources to supply autonomous low-power electronics has led to interest in triboelectric materials. We have fabricated an arch-shaped hybrid carbon fiber reinforced polymer (CFRP) composite based triboelectric device employing a curved upper copper electrode and a flat lower electrode of a polyimide that are both combined with CFRP materials. This device aims to be used as a triboelectric harvesting energy source for self-powered sensors that can be combined with fibre reinforced composite based structures. We have been able to produce a voltage up to 300 mV which can charge a capacitor to 250mV. The ability to combine triboelectric and CFRP materials provides a new approach to integrate energy harvesting into engineering structures and manufacture robust harvesting devices.

Impact and Quasi-Static Mechanical Properties of a Carbon Fiber Reinforced Carbon Nanotube/Epoxy

2012 ◽  
Author(s):  
Mehran Tehrani ◽  
Ayoub Y. Boroujeni ◽  
Timothy B. Hartman ◽  
Thomas P. Haugh ◽  
Scott W. Case ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Tensile Modulus ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Structural Applications ◽  
The Matrix ◽  
Static Mechanical ◽  
Carbon Fiber Reinforced ◽  
Composite Energy

Carbon fiber reinforced plastics (CFRPs) possess superior in-plane mechanical properties and are widely used in structural applications. Altering the interphase of CFRPs could alleviate the shortcomings of their out-of-plane performance. In this work, the effects of adding multi-walled carbon nanotubes (MWCNTs) to the epoxy matrix of a CFRP are investigated. Two sets of CFRPs with matrices comprising MWCNTs/epoxy and neat epoxy, respectively, were fabricated. The tensile properties of the two systems, namely the stiffness, the ultimate strength, and the strain to failure were evaluated. The results of the tension tests showed slight changes on the on-axis (along the fiber) tensile modulus and strength of the carbon fiber reinforced epoxy/MWCNT compared to composites with no MWCNTs. The addition of MWCNTs to the matrix moderately increased the strain to failure of the composite. Energy absorption capabilities for the two sets of composites under an intermediate impact velocity (100 m.s−1) test were measured. The energy dissipation capacity of the CFRPs incorporating MWCNTs was higher by 17% compared to the reference CFRPs.

Mechanical Analysis of Polybenzoxazine Matrix in Fiber Metal Laminates

2016 ◽  
Vol 869 ◽  
pp. 215-220
Author(s):  
Cristiane Vilas Boas ◽  
Felipe Moreno ◽  
Demetrio Jackson dos Santos
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
High Performance ◽  
Mechanical Performance ◽  
Maximum Load ◽  
Fiber Reinforced ◽  
Scanning Calorimetry ◽  
Fiber Metal Laminates ◽  
Carbon Fiber Reinforced ◽  
Fiber Metal

In this work we investigated the application of a novel high performance polymer, polybenzoxazine, as a polymeric matrix in Fiber Metal Laminates (FML). This polymer, when applied on the development of FMLs, generated higher mechanical properties in comparison to fiber metal laminates obtained with epoxy. To investigate the mechanical performance of the polybenzoxazine matrix in FMLs, a mechanical behavior comparison was carried out among epoxy matrix laminates - glass fiber reinforced aluminum laminate (GLARE) and carbon fiber reinforced aluminum laminate (CARALL) - and FML constructed with aluminum and carbon fiber reinforced polybenzoxazine. The mechanical properties were characterized by drop weight impact and flexural methods, and the polybenzoxazine curing behavior through differential scanning calorimetry (DSC). Polybenzoxazine FML generated increasing of: 18% of maximum load, 11% of maximum elongation under flexure and 7.5% of impact energy absorption compared to other fiber metal laminates.

Effects of nitrile rubber and multi-walled carbon nanotubes on damage recovery and physical mechanical properties of carbon fiber–reinforced epoxy composites

2017 ◽  
Vol 30 (7) ◽  
pp. 856-863 ◽  
Author(s):  
Yang Yang ◽  
Xiaojia Zhao ◽  
Guirong Peng ◽  
Wenpei Liu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Nitrile Rubber ◽  
Fiber Reinforced ◽  
Internal Damage ◽  
The Matrix ◽  
Carbon Fiber Reinforced ◽  
Lower Temperature ◽  
Recovery Cycles

Carbon fiber–reinforced epoxy resin composites (CF/EP) modified with nitrile rubber (NBR) and multi-walled carbon nanotube (CNT) were prepared, and their shape memory behavior and physical mechanical properties were studied. NBR/CF/EP composite showed a relative lower bending strength than pure CF/EP composite, and a remarkable increase of bending strength was achieved for CNT/CF/EP composite. The bending strength of all samples increased after postcure process. All samples showed a similar glass transition temperature, but CNT/CF/EP composite could recover at lower temperature and faster speed, while NBR/CF/EP composite was just the opposite. During folding-recovery cycles, internal damage increased with folding times, which led to a general decrease in bending strength, storage modulus, and shape recovery ratio. The anomaly of slight increase in bending strength resulted from the further curing at high temperature during the folding-recovery cycles. Among the three kinds of samples, NBR/CF/EP composite showed the best folding-recovery precision, recovery repeatability, and recovery capability of bending strength, which was considered resulting from the various damage mechanisms. Compared with the cracks in the CNT/CF/EP composite, the rubber deformation and plastic deformation of the matrix of NBR/CF/EP composite prior to the occurrence of cracks were easier to recover during the inadvertent or intentional postcure process.

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