Temperature Effects on Epoxy Adhesives

Plecnik, Joseph M.; Iding, Robert H.; Cunningham, James; Bresler, Boris

doi:10.1061/jsdeag.0005362

Cited by 20 publications

(7 citation statements)

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“…It was observed that the maximum values obtained at 150 o C were decreased /steady progress when Tg temperature was exceeded. This progress is noted in the study by Cao et al [12] and Plecnik [17]. In addition, Sauder et al reported that they reached maximum strength value with increasing temperature due to fiber texture [13].…”

Section: Resultsmentioning

confidence: 67%

“…[0 0 /90 0 ] composite, 1200 0 C after heat treatment; they stated that the value of 60 GPa increased to 70 GPa, thus increasing the modulus of elasticity with a small increase. Plecnik [17] investigated the strength of epoxy resin at elevated temperatures by performing compression, tensile and shear tests. They stated that the strength decreased at temperatures close to the glass transition temperature and reached a fixed value when the glass transition temperature was exceeded.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Composite Plates at Different Conditions

Örçen¹,

Turan²,

Bingöl³

2019

European Journal of Technic

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In this study; the effects of thermal aging on the mechanical properties of composite materials were investigated. In study, eight layered woven glass fiber reinforced epoxy composite plates were used. Thermal aging was performed in an electric furnace using time and temperature change parameters. The time changes were 1, 3 and 5 hours, and 50 0 C, 100 0 C, and 150 0 C were used for temperature changes. Thermally aged composite plates, at specified time and temperature values; modulus of elasticity, poisson ratio, tensile strength, compression strength, shear modulus and shear strength were determined in fiber reinforcement direction. The results obtained were compared with the results obtained from the specimens waited at room temperature. At the end of the study, it was determined that the mechanical properties of the composite plates changed when the thermal aging temperature and temperature increased.

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Section: Resultsmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Composite Plates at Different Conditions

Örçen¹,

Turan²,

Bingöl³

2019

European Journal of Technic

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“…Plecnik [15] performed compression, tensile and shear tests to evaluate the strength properties of epoxy resins at elevated temperatures. It was found that the compressive strength of the epoxy decreased significantly at temperatures close to the glass transition temperature and reached a zero value when the temperature went above the glass transition temperature of 1008C.…”

Section: Thermal Properties Of Polymersmentioning

confidence: 99%

Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Cao

Wang

2009

Journal of Composite Materials

236

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The performance of fiber reinforced polymer (FRP) composites at high temperatures is a serious concern that needs investigation before the incorporation of these composites into important engineering structures. This article presents an experimental study on the tensile properties of carbon fiber reinforced polymer (CFRP) sheets, hybrid carbon/glass fiber reinforced polymer (C/GFRP) sheets and hybrid carbon/basalt fiber reinforced polymer (C/BFRP) sheets at different temperatures. The specimens of FRP sheets were tested at temperatures ranging from 16 to 200°C, while corresponding dry fiber sheets (without resin impregnation) were tested at 16°C as a reference. The test results show that the tensile strength of carbon fibers in different FRP sheets decreases significantly with increasing temperature, and remains almost stable at an ultimate value (3000 MPa) after the polymer exceeds its glass transition temperature (T g), which is higher than the tensile strength of the non-impregnated fiber sheets at room temperature. At elevated temperatures, the hybridization of fibers can reduce the scatter of the tensile strengths of CFRP composites. Additionally, the tensile strength of CFRP sheets with different dimensions is significantly different, but size dependence is independent of temperature. Furthermore, elevated temperature also influences the failure modes of FRP composites.

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“…, 2013), epoxys deteriorate significantly in high temperature environments exceeding the glass transition temperature T g (65 °C–82 °C) (Blontrock et al. , 1999; Plecnik et al. , 1980) or in other harsh environments, and the bond strength decreases rapidly.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on performance of CFRP-strengthened RC beams with geopolymer and epoxy

Liu

Wen

et al. 2022

IJSI

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PurposeIn this paper, to obtain shear and bending performance of carbon fiber-reinforced polymer (CFRP)-strengthened beams bonded by geopolymers, the effects of impregnated adhesive types, strengthened scheme, CFRP layer and pre-cracked width are investigated, and the performance of CFRP-strengthened beams is validated by the establishment of Finite Element Models (FEMs).Design/methodology/approachIn this paper, static loading test and finite element analysis of epoxy-CFRP-strengthened (ECS) and geopolymer-CFRP-strengthened (GCS) were carried out, and the bearing capacity and stiffness were compared, the results show that GCS reinforced concrete (RC) beam is feasible and effective.FindingsThe bearing capacity, crack distribution and development, load–deflection curves of GCS RC beams with different pre-crack widths were investigated. The reinforcement effect of geopolymer achieves the same as epoxy, effectively improving the ultimate bearing capacity of the beam, with a maximum increase rate of 28.9%. The failure mode of CFRP is broken in the yield failure stage of GCS RC beam with reasonable strengthening form, and the utilization rate of CFRP is improved. CFRP-strengthened layers, pre-cracked widths significantly affect the mechanical properties, and deformation properties of the strengthened beams.Originality/valueCompared with ECS RC beams, the bearing capacity and stiffness of GCS RC beams are similar to or even better, indicating that GCS RC beam is feasible and effective. It is a new method for CFRP-strengthened beams, which not only conforms to the concept of national ecological civilization construction, but also provides an economical, environmentally friendly and excellent performance solution for structural reinforcement.

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Temperature Effects on Epoxy Adhesives

Cited by 20 publications

References 0 publications

Mechanical Properties of Composite Plates at Different Conditions

Mechanical Properties of Composite Plates at Different Conditions

Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Experimental study on performance of CFRP-strengthened RC beams with geopolymer and epoxy

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