High‐temperature tensile behavior at different crosshead speeds during loading of glass fiber‐reinforced polymer composites

Mahato, Kishore Kumar; Dutta, Krishna; Ray, Bankim Chandra

doi:10.1002/app.44715

Cited by 23 publications

(10 citation statements)

References 25 publications

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“…However, its long-term durability has aroused some concerns, which has limited its wider application in engineering. It was reported that GFRC suffered from severe strength reduction and ductility reduction as service life increases [4][5][6][7][8][9]. e exact mechanisms underlying this degradation process are still debated but it is normally accepted that it involves a combination of glass fibre corrosion caused by the hydroxyl in the pore solution [10,11] and significant CH precipitation between and around fibres that cause loss of flexibility [12].…”

Section: Introductionmentioning

confidence: 99%

Durability of GFRC Modified by Calcium Sulfoaluminate Cement under Elevated Curing Temperatures

Song

Dou

2019

Advances in Materials Science and Engineering

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CSA/GFRC is an advanced composite material possessed with great ductility and durability. However, its bending performance and fibre condition, as well as intrinsic microstructural changes, under elevated temperature have not been understood so far. XRD was applied in this study to investigate the hydration mechanism of CSA cement under 50°C, 70°C, and 80°C. Bending performance was carried out to test the toughness of CSA/GFRC. SEM was applied to observe the underlying microstructural changes of CSA/GFRC under different curing regimes. It was found out that there was a gradual degradation of both ultimate tensile strength and ultimate strain of CSA/GFRC with elevated curing temperature and curing age, but glass fibre still shows considerable ability to carry stress alone by bridging cracks. Microstructural studies showed that, at accelerated temperatures of 50°C and 70°C, the space between fibres remained empty in general only with some hydration products adhering to the fibre surface occasionally. At a higher accelerated curing temperature of 80°C, densification of the interfilamentary spaces by larger and clustered hydration products can be observed at longer curing ages, causing the fibres to lose parts of the flexibility. Therefore, it can be concluded that densification of interfilamentary spaces may have a greater role to play in the strength degradation of CSA/GFRC than mechanisms associated with fibre weakening caused by chemical corrosion.

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Section: Introductionmentioning

confidence: 99%

Durability of GFRC Modified by Calcium Sulfoaluminate Cement under Elevated Curing Temperatures

Song

Dou

2019

Advances in Materials Science and Engineering

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“…The reduction in tensile strength observed at low and high temperatures may be associated with thermal stress induced in the material, especially in the fiber/ matrix interface, causing microcracks, and consequently, making easy the premature failure of the material. [50] Also, the softening of the polymer matrix modified the properties of composites, affecting the ability of the matrix to protect, unify and transfer the load to the fibers. [51,52] In order to identify the possible mechanism of the fracture, fractographic analyses were carried out, as well as to evaluate the influence of the addition of MWCNT into the laminates.…”

Section: Tensile Strength Testsmentioning

confidence: 99%

“…The load used in this test was based on the load obtained by the specimens submitted to a tensile test. It is important to point out that there was an average (50,55,60,65,70, and 80% of the maximum tensile load) to determine the best condition to be used during the fatigue tests. The load of 65% (%Su) was defined to conduct the fatigue tests and a graph of %Su (maximum load) as the function of the number of cycles until failure is depicted in Figure 5.…”

Section: Fatigue Testsmentioning

confidence: 99%

The effect of temperature on fatigue strength of poly(ether‐imide)/multiwalled carbon nanotube/carbon fibers composites for aeronautical application

Santos

Ribeiro

Hein

et al. 2020

J of Applied Polymer Sci

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This work concerns the fatigue behavior at three different temperature conditions (−40, 20, and 80 C) and the addition of multiwalled carbon nanotube (MWCNT) into a carbon-fiber reinforced poly(ether-imide) composite. The incorporation of MWCNT into the composite increased the tensile strength and Young's modulus by up 5 and 2%, respectively. At low temperature, the incorporation of the nanoparticles improved the fatigue strength of the laminates by 15%. The shear strength results obtained by interlaminar shear strength and compression shear test tests have shown an increase of about 16 and 58%, respectively, by the introduction of nanotubes into the laminates. Fractographic observations revealed that the surface of carbon nanotube laminate (PEI/MWCNT/CF) presented a ductile behavior, and differences in the fracture aspects of the material compared to the traditional PEI/CF laminate have been observed.

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“…During their high-temperature tests, the thermal chamber was not kept under vacuum, and the results of Poisson’s ratio were not reported. The effect of the loading rate on the tension properties of the GFRP laminates under various temperatures (from 25 to 110 °C) was carried out recently by Mahato et al [ 26 ]. Similar studies regarding the temperature effects have been conducted on CFRPs [ 27 , 28 , 29 , 30 ] and AFRPs [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Degradation of the In-plane Shear Modulus of Structural BFRP Laminates Due to High Temperature

Duan

Jiang

Liu

et al. 2018

Sensors

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The behavior of fiber reinforced polymer (FRP) composites at high temperature is a critical issue that needs to be clearly understood for their structural uses in civil engineering. However, due to technical difficulties during testing at high temperature, limited experimental investigations have been conducted regarding the thermal behavior of basalt fiber reinforced polymer (BFRP) composites, especially for the in-plane shear modulus of BFRP laminates. To this end, both an analytical derivation and an experimental program were carried out in this work to study the in-plane shear modulus of BFRP laminates. After the analytical derivation, the in-plane shear modulus was investigated as a function of the elastic modulus in different directions (0°, 45° and 90° of the load-to-fiber angle) and Poisson’s ratio in the fiber direction. To obtain the in-plane shear modulus, the four parameters were tested at different temperatures from 20 to 250 °C. A novel non-contacting digital image correlation (DIC) sensing system was adopted in the high-temperature tests to measure the local strain field on the FRP samples. Based on the test results, it was found that the elastic moduli in different directions were reduced to a very low level (less than 20%) from 20 to 250 °C. Furthermore, the in-plane shear modulus of BFRP at 250 °C was only 3% of that at 20 °C.

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High‐temperature tensile behavior at different crosshead speeds during loading of glass fiber‐reinforced polymer composites

Cited by 23 publications

References 25 publications

Durability of GFRC Modified by Calcium Sulfoaluminate Cement under Elevated Curing Temperatures

Durability of GFRC Modified by Calcium Sulfoaluminate Cement under Elevated Curing Temperatures

The effect of temperature on fatigue strength of poly(ether‐imide)/multiwalled carbon nanotube/carbon fibers composites for aeronautical application

Degradation of the In-plane Shear Modulus of Structural BFRP Laminates Due to High Temperature

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