Effect of water absorption of the mechanical behavior of fiberglass pipes used for offshore service waters

2008 ◽  
Vol 83 (2) ◽  
pp. 221-225 ◽  
Author(s):  
J.R.M. d’Almeida ◽  
R.C. de Almeida ◽  
W.R. de Lima
Keyword(s):  
Mechanical Behavior ◽  
Water Absorption ◽  
Effect Of Water

Effect of water absorption on the flexural strength of a green sandwich composite

2019 ◽  
Vol 61 (4) ◽  
pp. 369-375
Author(s):  
Sivalingam Prabhakaran ◽  
Vijayan Krishnaraj ◽  
Mouleeswaran Senthilkumar ◽  
Redouane Zitoune ◽  
Krishna Shankar
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Sandwich Composite ◽  
Effect Of Water

Evaluate the durability and effect of water absorption of recycled aggregate used in pavement

2021 ◽  
Vol 42 ◽  
pp. 2561-2565
Author(s):  
Eman Abdulhasan Mohammed Al-Ghalibi ◽  
Safaa A.Mohamad
Keyword(s):  
Water Absorption ◽  
Recycled Aggregate ◽  
Effect Of Water

scholarly journals Effect of Water Ingress on the Mechanical and Chemical Properties of Polybutylene Terephthalate Reinforced with Glass Fibers

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1261
Author(s):  
Catarina S. P. Borges ◽  
Alireza Akhavan-Safar ◽  
Eduardo A. S. Marques ◽  
Ricardo J. C. Carbas ◽  
Christoph Ueffing ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Water Uptake ◽  
Significant Influence ◽  
Water Immersion ◽  
Water Diffusion ◽  
Polybutylene Terephthalate ◽  
Chemical Changes ◽  
Water Ingress ◽  
Effect Of Water

Short fiber reinforced polymers are widely used in the construction of electronic housings, where they are often exposed to harsh environmental conditions. The main purpose of this work is the in-depth study and characterization of the water uptake behavior of PBT-GF30 (polybutylene terephthalate with 30% of short glass fiber)as well as its consequent effect on the mechanical properties of the material. Further analysis was conducted to determine at which temperature range PBT-GF30 starts experiencing chemical changes. The influence of testing procedures and conditions on the evaluation of these effects was analyzed, also drawing comparisons with previous studies. The water absorption behavior was studied through gravimetric tests at 35, 70, and 130 °C. Fiber-free PBT was also studied at 35 °C for comparison purposes. The effect of water and temperature on the mechanical properties was analyzed through bulk tensile tests. The material was tested for the three temperatures in the as-supplied state (without drying or aging). Afterwards, PBT-GF30 was tested at room temperature following water immersion at the three temperatures. Chemical changes in the material were also analyzed through Fourier-transform infrared spectroscopy (FTIR). It was concluded that the water diffusion behavior is Fickian and that PBT absorbs more water than PBT-GF30 but at a slightly higher rate. However, temperature was found to have a more significant influence on the rate of water diffusion of PBT-GF30 than fiber content did. Temperature has a significant influence on the mechanical properties of the material. Humidity contributes to a slight drop in stiffness and strength, not showing a clear dependence on water uptake. This decrease in mechanical properties occurs due to the relaxation of the polymeric chain promoted by water ingress. Between 80 and 85 °C, after water immersion, the FTIR profile of the material changes, which suggests chemical changes in the PBT. The water absorption was simulated through heat transfer analogy with good results. From the developed numerical simulation, the minimum plate size to maintain the water ingress unidirectional was 30 mm, which was validated experimentally.

Effect of water absorption on pollen adhesion

2015 ◽  
Vol 442 ◽  
pp. 133-139 ◽  
Author(s):  
Haisheng Lin ◽  
Leonardo Lizarraga ◽  
Lawrence A. Bottomley ◽  
J. Carson Meredith
Keyword(s):  
Water Absorption ◽  
Effect Of Water

Effect of Water Absorption Behaviour on Tensile Properties of Hybrid Jute-Roselle Woven Fibre Reinforced Polyester Composites

2021 ◽  
Vol 18 (4) ◽  
Author(s):  
Agung Efriyo Hadi ◽  
Tezara Cionita ◽  
Deni Fajar Fitriyana ◽  
Januar Parlaungan Siregar ◽  
Ahmed Nurye Oumer ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Fibre Composite ◽  
Unsaturated Polyester ◽  
Water Immersion ◽  
Tensile Modulus ◽  
Natural Fibre ◽  
Jute Fibre ◽  
Thickness Swelling ◽  
Effect Of Water

Incorporating natural fibre as reinforcement in the polymer matrix has shown a negative effect since the natural fibre is hydrophilic. The natural fibre easily absorbs water which causes an effect on the mechanical properties of the composites. The objective of this paper is to investigate the water absorption behaviour of hybrid jute-roselle woven fibre reinforced unsaturated polyester composite and the effect of water absorption in terms of tensile strength and tensile modulus. The effect of hybrid composite on the thickness swelling will be tested. The fabrication method used in this study is the hand lay-up technique to fabricate 2-layer and 3-layer composites with layering sequences of woven jute (J)/roselle (Ro) fibre. The results of the study showed that pure roselle fibres for 2 and 3-layer composites have the highest water absorption behaviour 3.86% and 5.51%, respectively, in 28 days) as well as thickness swelling effect, whereas hybrid J-Ro and J-J-Ro composites showed the least water absorption (2.65% and 3.76%, respectively) in 28 days) in both the tests. The hybridisation between jute and roselle fibres reduced water absorption behaviour and improved the fibres dimensional stability. The entire composites showed a decreasing trend for both tensile strength and tensile modulus strength after five weeks of water immersion. Jute fibre composite hybridised with roselle fibre can be used to reduce the total reduction of both tensile strength and tensile modulus throughout the whole immersion period. Moreover, the tensile testing showed that jute fibre composite hybridised with roselle fibre have produced the strongest composite with the highest tensile and modulus strength compared to other types of composites. The hybridisation of diverse fibre reinforcements aids in minimising the composite water absorption and thickness swelling, hence reducing the effect of tensile characteristics.

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