Temperature Dependency of Tensile Behavior of CFRP Sheets

Wu, Zhishen; Iwashita, Kentaro; Yagashiro, Syun; Ishikawa, Takashi; Hamaguchi, Yukihisa

doi:10.6089/jscm.32.137

Cited by 6 publications

(5 citation statements)

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“…Previous studies [14,20,21] have indicated that the tensile strength of dry carbon fiber sheets that were 2000 mm long could be improved from 30-40 to 60-70% according to the strength of FRP sheets through hybridizing with EG glass, basalt or TG glass fibers (Figure 11). However, in this study, small dry fiber sheets that were 400 mm long did not show the desired hybrid effect in improving the tensile strength, but showed a lower scatter in the test values (see Table 7).…”

Section: Temperature-dependent Tensile Strength Of Hybrid Frp Compositesmentioning

confidence: 97%

“…In this study, a dynamic mechanical analysis (DMA) experiment was performed in order to find out the thermal properties of a kind of epoxy resin polymer (FR-E3P) [14]. This type of epoxy resin, with a mix ratio of 2 : 1, is widely used in construction in Japan.…”

Section: Thermal Properties Of Polymersmentioning

confidence: 99%

“…Specimens in series 2 comprised CFRP sheets and carbon fiber sheets without impregnation of epoxy resin, and were both 2200 mm long and 80 mm wide for the purpose of investigating size dependency. In both series, except the dry fiber sheet without epoxy resin impregnation, all of the specimens were impregnated with an epoxy resin adhesive using a hand lay-up method, and cured at 808C for 3 h [14,17]. The anchorage portions were clamped by GFRP tabs for small sheets and by steel couplers for large sheets, where epoxy resin adhesive was adopted to ensure that failure occurred at the tensile area and not at the anchorage.…”

Section: Materials and Specimensmentioning

confidence: 99%

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Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Cao

Wang

2009

Journal of Composite Materials

237

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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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Section: Temperature-dependent Tensile Strength Of Hybrid Frp Compositesmentioning

confidence: 97%

Section: Thermal Properties Of Polymersmentioning

confidence: 99%

Section: Materials and Specimensmentioning

confidence: 99%

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Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Cao

Wang

2009

Journal of Composite Materials

237

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“…Response of liquid-cooled GFRP slabs in fire is investigated by [15]. Tensile behavior of CFRP sheets with two different epoxy resins at different temperatures is studied by [16]. Investigation on epoxy resin at elevated temperature elucidated that the compressive strength of epoxy significantly decreased at temperature close to glass transition temperature and reached to zero with further increase in temperature [17].…”

Section: High Temperaturementioning

confidence: 99%

Durability and integrity studies of environmentally conditioned interfaces in fibrous polymeric composites: Critical concepts and comments

Ray

Rathore

2014

Advances in Colloid and Interface Science

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“…Although studies on the strength degradation of composites at elevated and high temperatures are limited in number, some useful modeling and/or experimental investigations on the mechanical properties of FRP composites have been conducted. [8][9][10][11][12][13][14][15][16] Among these studies, the tests by Foster and Bisby 8 on carbon FRP (CFRP) and glass FRP (GFRP) sheets after exposure up to 600 C followed by cooling to room temperature showed that the residual tensile strength and stiffness of these sheets declined severely only when temperatures exceeded the thermal decomposition temperature (T d ) (>T g ). Bosze et al 9 performed tests on unidirectional hybrid CFRP/GFRP rods, with two-type epoxy matrix impregnation, at temperatures elevated up to 250 C, which indicated that the tensile strength of the two epoxy composites diminished at high temperatures, but with differing temperature thresholds, and a simple linear correlation was found between the high-temperature tensile strength and storage modulus.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and prediction of temperature-dependent tensile strength of unidirectional carbon fiber-reinforced polymer composites

Cao

Wang

2011

Journal of Reinforced Plastics and Composites

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To predict temperature-dependent tensile strength of unidirectional CFRP composites, numerical analysis and model simulation were conducted in terms of experimental results. The effect of elevated temperatures on tensile strength of CFRP sheets was evaluated between 20 C and 120 C, and the storage moduli of two types of epoxy resins, with glass transition temperatures (T g ) of 42 C and 45 C, were tested by DMA. The tensile experiments of CFRP sheets show that the tensile strength exhibits stable behavior at the low-temperature range (below glass transition temperature), but drops rapidly during the glass transition region, and then reaches a plateau. Analysis results indicate that the degradation of tensile strength is mainly due to matrix softening and loss of fiber-matrix adhesion, based on which a semi-empirical model is proposed to precisely describe tensile strength reduction as the temperature increases. The parameters of the model consist of the glass transition temperature of polymer matrix, the polymer glass transition region, and the residual strength after the glass transition region. Model prediction of tensile strength vs. temperature shows good agreement with the experimental results.

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Temperature Dependency of Tensile Behavior of CFRP Sheets

Cited by 6 publications

References 0 publications

Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures

Durability and integrity studies of environmentally conditioned interfaces in fibrous polymeric composites: Critical concepts and comments

Evaluation and prediction of temperature-dependent tensile strength of unidirectional carbon fiber-reinforced polymer composites

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