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.

Performances of Carbon Fiber Cloth Reinforced Bamboos

2012 ◽  
Vol 174-177 ◽  
pp. 1459-1462
Author(s):  
Gui Qiu Huang ◽  
Zhen Huang ◽  
Jing Jiang ◽  
Xue Yuan Deng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Fiber Reinforced ◽  
Carbon Fiber Cloth ◽  
Series Of Experiments ◽  
Carbon Fiber Reinforced ◽  
Mechanical Performances

This paper focuses on the mechanical properties of carbon fiber cloth reinforced bamboos. Using the carbon fiber cloth to reinforce circularly the bamboo can protect dry bursting of the bamboos and improve its mechanical performances. A series of experiments were carried out to investigate the compressive strength, tensile strength and bending strength of bamboo reinforced with carbon fiber cloth. The mechanical performances of bamboos with and without reinforcing were compared and the efficient reinforcing method was suggested, with such method the compressive strength and bending strength of carbon fiber reinforced bamboos could be increased obviously compared with that of bamboos without reinforcing.

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.

Pultruded glass fiber- and pultruded carbon fiber-reinforced chemically bonded phosphate ceramics

2011 ◽  
Vol 45 (23) ◽  
pp. 2391-2399 ◽  
Author(s):  
H.A. Colorado ◽  
H.T. Hahn ◽  
C. Hiel
Keyword(s):  
Carbon Fiber ◽  
Glass Fiber ◽  
Bending Strength ◽  
Bending Test ◽  
Fiber Reinforced ◽  
X Ray ◽  
The Matrix ◽  
Carbon Fiber Reinforced ◽  
Micro Tomography ◽  
Electron Microscopes

The main goal of this article is to present the pultrusion process for glass fiber- and carbon fiber-reinforced chemically bonded phosphate ceramics (CBPCs). Samples were fabricated with 15% of fibers by volume. An improvement (with respect to the matrix) of 29 times for the bending strength of CBPCs pultruded graphite fibers composites and 17 times for CBPCs pultruded glass fiber composites is shown. Bending strength was obtained with the three-point bending test. The CBPCs were fabricated by mixing special formulations of both wollastonite powder and phosphoric acid, through resonant acoustic mixing. The microstructure was analyzed with optical and scanning electron microscopes. X-ray compositional maps were obtained for the cross-section of pultruded samples with SEM-EDS. Pultruded sample response at high temperature and thermal shock were also analyzed. The structural characterization of samples was conducted by using X-ray micro tomography.

Bamboo Strengthened with Carbon Fiber Reinforced Polymer for the Substitutes of Steel Substructures

2012 ◽  
Vol 517 ◽  
pp. 233-237 ◽  
Author(s):  
Zhen Huang ◽  
Yong Jun Wu ◽  
Chang Zhang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Portal Frame ◽  
Carbon Fiber Reinforced

This paper presents an investigation on the mechanical properties of bamboos Mao Zhu (Phyllostachys Pubescens) strengthened with carbon fiber reinforced polymer (CFRP) and used as the substitute of steel substructures for a low carbon construction. At first, a series experimental study is carried out to investigate the compressive strength, bending strength and tensile strength of Mao Zhu, which is strengthened with CFRP by different ways. Then the mechanical properties of bamboos with different strengthening methods of CFRP are compared. The most efficient strengthening method is suggested for the carbon fiber strengthened bamboos, with such method the compressive strength and bending strength of Mao Zhu could be increased more than 30% and 44% compared with that of Mao Zhu without strengthening. Finally this paper discusses the advantages of the carbon fiber strengthened bamboos used as the substitutes of the steel substructures, for example the purlins and bracings of steel portal frame structures. The effective use of the bamboos as the substitutes of steel substructures will reduce the steel amount used in the steel portal frame structure, which is commonly used as low-rise factory building structure worldwide.

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.

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.

scholarly journals Preparation and Mechanical Properties of Graphene/Carbon Fiber-Reinforced Hierarchical Polymer Composites

2019 ◽  
Vol 3 (1) ◽  
pp. 30 ◽  
Author(s):  
Jose Vázquez-Moreno ◽  
Ruben Sánchez-Hidalgo ◽  
Estela Sanz-Horcajo ◽  
Jaime Viña ◽  
Raquel Verdejo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Low Weight ◽  
The Matrix ◽  
Hierarchical Composites ◽  
Superior Mechanical Properties ◽  
Carbon Fiber Reinforced

Conventional carbon fiber-reinforced plastics (CFRP) have extensively been used as structural elements in a myriad of sectors due to their superior mechanical properties, low weight and ease of processing. However, the relatively weak compression and interlaminar properties of these composites limit their applications. Interest is, therefore, growing in the development of hierarchical or multiscale composites, in which, a nanoscale filler reinforcement is utilized to alleviate the existing limitations associated with the matrix-dominated properties. In this work, the fabrication and characterization of hierarchical composites are analyzed through the inclusion of graphene to conventional CFRP by vacuum-assisted resin infusion molding.

scholarly journals Effect of Organo-Modified Montmorillonite Nanoclay on Mechanical, Thermo-Mechanical, and Thermal Properties of Carbon Fiber-Reinforced Phenolic Composites

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 754
Author(s):  
Jantrawan Pumchusak ◽  
Nonthawat Thajina ◽  
Watcharakorn Keawsujai ◽  
Pattarakamon Chaiwan
Keyword(s):  
Thermal Properties ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Mechanical And Thermal Properties ◽  
Fiber Reinforced ◽  
Heat Resistant ◽  
Degradation Temperature ◽  
Modified Montmorillonite ◽  
Carbon Fiber Reinforced ◽  
Montmorillonite Nanoclay

This work aims to explore the effect of organo-modified montmorillonite nanoclay (O-MMT) on the mechanical, thermo-mechanical, and thermal properties of carbon fiber-reinforced phenolic composites (CFRP). CFRP at variable O-MMT contents (from 0 to 2.5 wt%) were prepared. The addition of 1.5 wt% O-MMT was found to give the heat resistant polymer composite optimum properties. Compared to the CFRP, the CFRP with 1.5 wt% O-MMT provided a higher tensile strength of 64 MPa (+20%), higher impact strength of 49 kJ/m2 (+51%), but a little lower bending strength of 162 MPa (−1%). The composite showed a 64% higher storage modulus at 30 °C of 6.4 GPa. It also could reserve its high modulus up to 145 °C. Moreover, it had a higher heat deflection temperature of 152 °C (+1%) and a higher thermal degradation temperature of 630 °C. This composite could maintain its mechanical properties at high temperature and was a good candidate for heat resistant material.

Sign in / Sign up

Export Citation Format

Share Document