Comparative experimental study on mechanical properties of CFRP subjected to seawater and hydrostatic pressure

Liu, Yuchi; Wang, Han; Du, Jing-Xing; Lin, Junxin; Cao, Yingying; Liu, Cheng

doi:10.1016/j.compscitech.2023.110193

Cited by 10 publications

(2 citation statements)

References 29 publications

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“…Continuous grading refers to the continuous distribution of particles of all particle sizes in the aggregate, without obvious particle size discontinuity. This graded type can form a relatively close accumulation structure, improve the compactness and strength of concrete [7] . When preparing the continuous grade aggregate, the aggregate of different particle sizes needs to be mixed according to a certain proportion to ensure the continuous distribution of the aggregate.…”

Section: Continuous Gradationmentioning

confidence: 99%

Comparative study on the mechanical properties of different graded concrete aggregate

2024

jmpd

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This paper aims to study the mechanical properties of different graded concrete aggregates and discuss the influence of graded concrete performance. Through the literature review, the research status of concrete aggregate gradation at home and abroad is summarized, and the shortcomings of the existing studies are summarized. On this basis, a variety of graded aggregates are selected to prepare concrete specimens, and their mechanical properties are tested, including compressive strength, folding strength and other indexes. The experimental results show that the mechanical properties of different graded concrete aggregate are significantly different, and the strength and deformation of graded matched concrete have important influence. Some graded types of concrete show high strength and stability, while others may decline. Through comparative analysis, this paper summarizes the advantages and disadvantages of various graded types, and puts forward suggestions to optimize the concrete aggregate grading. These suggestions help to more reasonably select and use concrete aggregate in practical engineering and improve the performance and quality of concrete. This study is of great significance for promoting the development and application of concrete technology, and also provides a valuable reference for future research.

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Section: Continuous Gradationmentioning

confidence: 99%

Comparative study on the mechanical properties of different graded concrete aggregate

2024

jmpd

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“…[27][28][29][30] The influence of both phenomena can be predicted and described by determining the activation energy required to initiate such damage. 31 In the work of Hong et al 32 the authors presented a methodology for predicting the lifespan of a PU elastomer using Arrhenius plots. They immersed their material in a solution of ethylene glycol and water for up to 32 days at temperatures ranging from 50 to 80 C. The authors observed an increasing weight change over time due to the absorption of the solution and a decreasing tensile strength resulting from the diffusion of the solution among the segments of the PU, which reduces the strength of the hydrogen bonds between the urethane segments.…”

Section: Introductionmentioning

confidence: 99%

Aging properties of a vegetable‐based polyurethane foam under high relative humidity and different temperatures

Da Silva,

De Barros,

Casari

et al. 2024

Polymer Engineering & Sci

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The objective of this study is to assess, characterize, and forecast the aging effects on the mechanical properties of a vegetable‐based polyurethane foam (PUF) derived from castor oil under elevated relative humidity conditions and at two distinct load orientations (aligned with the expansion direction and perpendicular to it). Ten specimens were subjected to temperatures of 60, 75, and 90°C, along with a relative humidity of 90%, for a duration of up to 60 days. Compression tests, following ASTM D1621‐16 standards and supplemented by 3D digital image correlation, revealed nearly isotropic behavior with marginally lower compression strength in the expansion direction. On the other hand, the strength of the foams at 90°C was higher in that direction. This led to a smaller activation energy (Ea) in this property, which ended up showing a shorter lifespan prediction considering the strength retention in this direction. The stiffness values were proportionally more similar in both directions than the strength ones and this was observed in the Ea for those curves. In contrast to several other foams and polyurethanes, the one examined in this study exhibited consistently higher Ea values for its mechanical properties, particularly in the transverse direction to expansion, surpassing 94 kJ/mol. This indicates a robust diffusion and chemical stability, suggesting its potential for prolonged utilization compared to conventional oil‐based foams. A prediction was made that this foam would lose 50% of its stiffness and strength in around 9.8 and 9.5 years at 20°C, respectively, considering the directions more sensitive to the aging process. This research offers valuable insights for predicting lifespan based on operating temperatures and property retention needs, contributing to the advancement of sustainable materials in structural applications.Highlights Fifty specimens investigated for each of two directions. Evaluation of vegetable‐based PUF aging process unveils density changes. Unique behavior noted: different Ea values for each direction. High Ea values indicate enhanced mechanical stability over oil‐based foams. Lifespan prediction enhances material application prospects.

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Review on Mechanical Performance of Fibre-Reinforced Plastics in Marine Environments

Osa-uwagboe,

Silberschmidt,

Demirci

2024

Appl Compos Mater

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Fibre-reinforced plastics (FRPs) are increasingly popular in marine applications, such as boats, offshore wind-power installations, as well as oil and gas offshore systems thanks to their high stiffness, light weight, and damage resistance. This paper aims to examine the recent developments in the investigation of the effects of moisture uptake on the mechanical performance of FRP for maritime applications, to identify the gaps in the literature, and to suggest likely future research directions in this area. While the review is limited to recent studies—within the last two decades, it discusses in detail the current advances in the experimental investigations of moisture uptake on critical mechanical performance including tensile, flexural, shear and viscoelastic properties, thus covering the major quasi-static and dynamic regimes of FRPs subjected to seawater exposure.

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Comparative experimental study on mechanical properties of CFRP subjected to seawater and hydrostatic pressure

Cited by 10 publications

References 29 publications

Comparative study on the mechanical properties of different graded concrete aggregate

Comparative study on the mechanical properties of different graded concrete aggregate

Aging properties of a vegetable‐based polyurethane foam under high relative humidity and different temperatures

Review on Mechanical Performance of Fibre-Reinforced Plastics in Marine Environments

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