Tensile and bending test of carbon/epoxy and carbon/geopolymer composites after temperature conditioning

Krystek, Jan; Laš, Vladislav; Pompe, Vilém; Hájková, Pavlína

doi:10.1051/matecconf/201815705014

Cited by 8 publications

(17 citation statements)

References 3 publications

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“…For 0.0% alumina, the three treatments values of modulus of elasticity are 2197. 29 Table 4 summarizes the ANOVA statistical approach of modulus of elasticity values for three the treatments of 0.0%, 1.5%, 3.0%, and 4.5% alumina nanoparticles. A 0.0% alumina containing medium density fiberboard has a mean value of 2332.087 N/mm 2 and a variance of 13,748.06.…”

Section: Statistical Analysis Of the Mechanical And Physical Propertimentioning

confidence: 99%

“…Yan et al [22], Kovarik et al [19], and Bernal et al [27], studied the mechanical properties of samples cured at high-temperature and laboratory temperature heat treatment. Some properties namely compressive strength [19,23,27], impact resistance [24,25], Young's modulus [20,22,25], tensile properties [28,29], and flexural strength [19][20][21][22]25], were inspected on composites with alkali-activated aluminosilicates. It was found that the properties of composites with alkali-activated aluminosilicates depend on cure conditions of composites, type of fiber reinforcement, composition of alkali-activated aluminosilicates and number of layers of fiber reinforcement.…”

Section: Introductionmentioning

confidence: 99%

“…It was found that the properties of composites with alkali-activated aluminosilicates depend on cure conditions of composites, type of fiber reinforcement, composition of alkali-activated aluminosilicates and number of layers of fiber reinforcement. Composites with carbon fabric and alkali-activated aluminosilicates prepared by Krystek et al [ 29 ], were when tested, the tensile strength of the samples reached up to 265 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alumina Nano-Particles on Physical and Mechanical Properties of Medium Density Fiberboard

et al. 2020

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This research aims to explore the effects of nanoparticles such as alumina (Al2O3) on the physical and mechanical properties of medium density fiberboards (MDF). The nanoparticles are added in urea-formaldehyde (UF) resin with different concentration levels e.g., 1.5%, 3%, and 4.5% by weight. A combination of forest fibers such as Populus Deltuidess (Poplar) and Euamericana (Ghaz) are used as a composite reinforcement due to their exceptional abrasion confrontation as well as their affordability and economic value with Al2O3-UF as a matrix or nanofillers for making the desired nanocomposite specimens. Thermo-gravimetric analysis (TGA) and thermal analytical analysis (TAA) in the form of differential scanning calorimetry (DSC) are carried out and it has been found that increasing the percentage of alumina nanoparticles leads to an increase in the total heat content. The mechanical properties such as internal bonding (IB), modulus of elasticity (MOE) and modulus of rupture (MOR), and physical properties such as density, water absorption (WA), and thickness swelling (TS) of the specimens have been investigated. The experimental results showed that properties of the new Nano-MDF are higher when compared to the normal samples. The results also showed that increasing the concentration of alumina nanoparticles in the urea-formaldehyde resin effects the mechanical properties of panels considerably.

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Section: Statistical Analysis Of the Mechanical And Physical Propertimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Alumina Nano-Particles on Physical and Mechanical Properties of Medium Density Fiberboard

et al. 2020

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“…Mechanical properties were studied on samples cured at laboratory temperature and even after high-temperature heat treatment [6,14,21]. Commonly, compressive strength [14,17,21], flexural strength [6,14,15,16,19], Young’s modulus [6,15,19], tensile properties [22,23], and impact resistance [18,19] were investigated on composites with A-matrix. The properties of A-matrix composites depended on the type of fiber reinforcement, number of layers of fiber reinforcement, composition of A-matrix, A-matrix/fiber reinforcement weight ratio, and cure conditions of composites.…”

Section: Introductionmentioning

confidence: 99%

“…The properties of A-matrix composites depended on the type of fiber reinforcement, number of layers of fiber reinforcement, composition of A-matrix, A-matrix/fiber reinforcement weight ratio, and cure conditions of composites. Krystek et al [23] prepared composites with A-matrix and carbon fabric. The prepared samples reached a tensile strength up to 265 MPa.…”

Section: Introductionmentioning

confidence: 99%

Prepregs for Temperature Resistant Composites

2019

Self Cite

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In this paper, carbon fabric reinforced inorganic matrix composites were prepared. The inorganic matrix based on alkali activated aluminosilicate was used because of its resistance to fire and the temperatures up to 1000 °C. Influence of heat treatment of fabric, high temperature treatment of composite and preparation method on the mechanical properties and morphology of the composites were studied. The preparation of composites with the subsequent steps of impregnation, layering and curing of the composites was compared with the prepreg preparation method, which separates the impregnation of the reinforcement from the production of the composite. The SEM photographs show no differences in morphology between composites prepared from heat treated fabric and composites prepared from original fabrics. All four series of samples were comparatively saturated with matrix. Despite this, tensile properties of heat-treated fabric composites were negatively affected. While composites with heat-treated fabric reached the tensile strength up to 274 MPa, composites prepared without heat-treated fabric exhibited strengths higher than 336 MPa. Samples exposed to temperatures reaching 600 °C retained up to 40% of their original strength. The effect of composite preparation method on the tensile properties of the composites has not been proved.

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Enhanced thermo‐mechanical properties of carbon fiber reinforced thermoresistant polymer, a blend of di‐functional epoxy bisphenol A and a tri‐functional epoxy Tactix 742

Anurangi,

Jayalath,

Rani Senevirathna

et al. 2024

Polymer Composites

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Fiber reinforced polymer composite structures are particularly vulnerable to high temperatures as their strength drastically reduces under elevated temperature conditions. Therefore, it is important to improve the thermal stability of such composite structures to expand their potential range of applications. In this study, the effect of mixing two epoxy monomers, DGEBA and Tactix 742, which are di‐ and tri‐functional, respectively, on the thermal stability of their composites is investigated. The thermo‐mechanical analysis of these composites revealed that the glass transition temperature rose from 123 to 229°C when Tactix 742 is increased from 25% to 75%. The thermal resistance property is attributed to a three‐dimensional crosslink network which is initiated by tri‐functional Tactix 742. However, the higher percentage of Tactix led to a reduction in strength, possibly due to decreased crystallinity and formed amorphous phase material. Subsequently, a tensile strength model was employed to assess the performance at elevated temperatures. It was shown that a matrix with a mix of di‐ and tri‐functional monomers is highly promising for manufacturing thermoresistant polymeric composites with robust mechanical properties, thereby expanding their potential applications across various engineering fields such as civil and construction industries.Highlights A thermoresistant matrix by blending di‐ and tri‐functional epoxy monomers. Improved thermo‐mechanical properties and increased glass transition temperature of fiber reinforced composites. Mechanical performance of carbon fiber reinforced composites at elevated temperatures. Validated a model to estimate the tensile strengths of the composites at elevated temperatures.

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Tensile and bending test of carbon/epoxy and carbon/geopolymer composites after temperature conditioning

Cited by 8 publications

References 3 publications

Effect of Alumina Nano-Particles on Physical and Mechanical Properties of Medium Density Fiberboard

Effect of Alumina Nano-Particles on Physical and Mechanical Properties of Medium Density Fiberboard

Prepregs for Temperature Resistant Composites

Enhanced thermo‐mechanical properties of carbon fiber reinforced thermoresistant polymer, a blend of di‐functional epoxy bisphenol A and a tri‐functional epoxy Tactix 742

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