Effects of Cryogenic Aging on Flexural Behavior of Advanced Inter-ply Hybrid Fiber-Reinforced Polymer Composites

Dasari, Srinivasu; Lohani, Shiny; Gangineni, Pavan Kumar; Prusty, Rajesh Kumar

doi:10.1007/s12666-021-02288-5

Cited by 10 publications

(10 citation statements)

References 38 publications

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“…The experimental results revealed that the material performance reduces above GTT. The results are comparable with the observation made by Sethi et al [10,12] and Dasari et al [11].…”

Section: Flexural Strength Of Glass/epoxy Composite Tested At 1 Mm/mi...supporting

confidence: 92%

“…But the higher loading rate disables its strength to a great extent and, therefore, performance reduces dramatically. The matrix hardening and brittleness can be credited to this [11]. The thermal conditioning environment is more dangerous to material, and FS drops by 37.44% in the BG case.…”

Section: Role Of Conditioning Environmentmentioning

confidence: 99%

“…It can be understood that the performance of cryogenic conditioned samples exclusively depends upon the loading rate. In the case of a standard loading rate, material may perform close to RT specimen [11]. But the higher loading rate disables its strength to a great extent and, therefore, performance reduces dramatically.…”

Section: Role Of Conditioning Environmentmentioning

confidence: 99%

“…The testing at +100°C reduces SBS by 87.27, whereas with -100°C, it improves by 85.72%. Dasari et al [11] explored the cryogenic flexural response of carbon, glass, and their hybrid composite. It was seen that short-time conditioning negatively impacts the FS properties.…”

Section: Introductionmentioning

confidence: 99%

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Flexural response of glass/epoxy composites to thermal shocks and conditioning environment in varying loading rate

Shrivastava

Singh

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The structural integrity of composites faces severe challenge in the form of environmental extremes. Therefore, its performance in those cases were of great interest. In the present work, flexural strength of glass/epoxy composites were analysed in the environment of thermal shock generated by cryogenic exposure as well by thermal conditioning. Four cases were chosen, room temperature (RT), cryogenic conditioning (LN), thermal conditioning below (BG) and above glass transition temperature (AG). The exposure time for all the environments was kept constant at 24 hours. These responses are investigated with two sets of loading rates (i) 1 mm/minute and (ii) 10 mm/min. The experimental results indicate that; all three scenarios deeply impact the flexural response of the specimen. The first set experiences changes in flexural strength, strain, and chord modulus by (2.75, -8.52, 11.32), (21.36, 39.75, -6.47), (-35.8, -11.37, -22.94) % with LN, BG and AG condition respectively. Moreover, with high rate of loading these responses change by (-23.89, -28.41, -5.17), (-37.45, -43.56, -1.86), (-19.4, -27.46, 16.37) % respectively. The prolonged exposure indicates a strain hardening phenomenon in LN specimen, which improves the flexural strength with a 1 mm/min loading rate. However, this plasticization of the specimen was unable to bear the load at an elevated rate of loading, and therefore a loss in all the properties is seen with a 10 mm/min loading rate. Therefore, it is anticipated that the properties will further deteriorate with a higher rate of loadings.

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“…The experimental results revealed that the material performance reduces above GTT. The results are comparable with the observation made by Sethi et al [10,12] and Dasari et al [11].…”

Section: Flexural Strength Of Glass/epoxy Composite Tested At 1 Mm/mi...supporting

confidence: 92%

Section: Role Of Conditioning Environmentmentioning

confidence: 99%

Section: Role Of Conditioning Environmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexural response of glass/epoxy composites to thermal shocks and conditioning environment in varying loading rate

Shrivastava

Singh

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Additionally, the matrix hardened due to the polymer chains' freezing (reduction in mobility). [32,78,79] Furthermore, clamping occurred between SCF and the epoxy matrix in the modified composite after stress relaxation. The interfacial strength between SCF/epoxy is higher than that of GF/epoxy, resulting in modified composites showing excessively higher FS and FM at higher times of cryo-aging (2, 4, 8, and 16 h).…”

Section: Flexural Testing After Ex-situ Cryo-agingmentioning

confidence: 99%

Effects of in‐situ cryogenic testing temperature and ex‐situ cryogenic aging on the mechanical performance of glass fiber reinforced polymer composites with waste short carbon fibers as secondary reinforcements

et al. 2022

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Composite components' fabrication generates vast amounts of fiber wastes. This research suggests using short carbon fibers (SCFs) as secondary reinforcement in glass fiber reinforced polymer (GFRP) composite for cryogenic application. The SCFs (0.1, 0.3, and 0.5 wt%) were embedded in GFRP composites.Flexural test was performed to assess the integrity and durability of composites at in-situ cryogenic temperature (CT), and after ex-situ cryo-aging in liquid nitrogen for various time intervals (0.25, 0.5, 1, 2, 4, 8, and 16 h). The composite with 0.1 wt% of SCFs showed the highest enhancement in flexural performance in all testing conditions, $16% at Room Temperature (RT), $12% at Cryogenic Temperature (CT, and between 13% and 39% after cryo-aging. Composites with SCFs retained their strength at CT and after cryo-aging, suggesting that the waste fibers could be economically reused and preferred over other expensive nanofillers as secondary reinforcements in GFRP composites for cryogenic applications.

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An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Dasari

Lohani

Prusty

2021

J of Applied Polymer Sci

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Utilizing recycled or short fibers for making useful engineering composite component is a present research trend and requirement. Current research work explicates the effect of short carbon fibers (SCF) used as secondary reinforcement in woven glass/epoxy hybrid composites and evaluates their mechanical properties. Different concentrations (0.1, 0.3, and 0.5 wt%) of SCF were incorporated to assess the tensile, flexural, and interlaminar fracture toughness (Mode I and II) of the resulted composites. Composites with 0.1 wt% SCF showed 29.02% and 16.08% increment in the tensile and flexural strength, respectively. For Mode I and Mode II interlaminar fracture toughness tests, 0.1 wt% SCF‐GE samples showed the highest strain energy release rate. Double cantilever beam specimens were used for Mode I testing and an improvement of 13.49% in GIC value was observed. End‐notched flexure method was used for the Mode II tests, and 0.1 wt% SCF‐GE samples showed 20.45% increase in GIIC values. This paper explains the various reasons and mechanisms for obtaining such results. Scanning electron microscopy of the fractured surfaces was carried out to perceive the diverse failure micro‐mechanisms that could have been involved.

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Effects of Cryogenic Aging on Flexural Behavior of Advanced Inter-ply Hybrid Fiber-Reinforced Polymer Composites

Cited by 10 publications

References 38 publications

Flexural response of glass/epoxy composites to thermal shocks and conditioning environment in varying loading rate

Flexural response of glass/epoxy composites to thermal shocks and conditioning environment in varying loading rate

Effects of in‐situ cryogenic testing temperature and ex‐situ cryogenic aging on the mechanical performance of glass fiber reinforced polymer composites with waste short carbon fibers as secondary reinforcements

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

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