Inverse characterization of vegetable fibre-reinforced composites exposed to environmental degradation

Furtado, Samuel; Araújo, Aurélio L.; Silva, Arlindo

doi:10.1016/j.compstruct.2018.01.092

Cited by 18 publications

(11 citation statements)

References 12 publications

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“…The cotton fabric used in this work is bidirectional reinforced filler, and the CFRLs were considered to be anisotropic materials. [16][17][18] The tensile properties of CFLs in different direction are influenced by the warp and weft yarns of the fabric. In the series A, compared with A30, A45, and A60, A0 with the cotton fabric in the warp direction possess a higher tensile strength and modulus, and the lower strain at yield.…”

Section: Static Tensile Results Of Cfrlsmentioning

confidence: 99%

“…The CFRLs possessed higher tensile strengths, tensile modulus, and strain at yield due to the addition of cotton fabric, the tensile strength, tensile modulus, tensile strain at yield have increasing from 53%–187%, 2%–190%, and 80%–551%, in different direction, respectively. The cotton fabric used in this work is bidirectional reinforced filler, and the CFRLs were considered to be anisotropic materials 16–18 . The tensile properties of CFLs in different direction are influenced by the warp and weft yarns of the fabric.…”

Section: Resultsmentioning

confidence: 99%

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Nonlinear tensile behavior of cotton fabric reinforced polypropylene composites

Shao

Chen

Cao

et al. 2020

J of Applied Polymer Sci

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From the perspectives of elastoplasticity (nontime-dependent) and viscoelasticity (time-dependent), the Ramberg-Osgood relation and time-varying viscosity Maxwell (TVM) models were used to model and analyze the stress-strain behavior of cotton fabric-reinforced polypropylene composites (CFRLs), respectively. The Ramberg-Osgood relation could well describe the tensile behavior of CFRLs as an elastoplastic behavior, while the tensile behavior could also be described as a nonlinear viscoelasticity behavior by Maxwell model. The fitting results showed that the Maxwell model accurately described the tensile behavior of different CFRLs samples under low strain, but there was a considerable gap between the test data and model values when the strain was greater than 5%. Therefore, a time-varying viscosity fluid damper was used instead of a Newtonian fluid damper to modify the Maxwell model, namely the TVM model. The TVM model closely described the stress-strain behavior during the entire tensile process.

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Section: Static Tensile Results Of Cfrlsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Nonlinear tensile behavior of cotton fabric reinforced polypropylene composites

Shao

Chen

Cao

et al. 2020

J of Applied Polymer Sci

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“…The water uptake is responsible for increasing the mobility of the side groups and molecular chains, which leads to the reversible plasticization of the polymer matrix [32][33][34][35]. The matrix plasticization increases the fracture toughness, while it also reduces the strength, stiffness, fatigue durability, and natural frequencies of the natural composite [36][37][38][39][40][41][42][43][44][45]. When the sisal fiber-reinforced polypropylene (PP) composite is immersed in hot water at 90 • C, the tensile strength and modulus are reduced with the increasing immersion time in the water, while the impact strength increases initially with the immersion time.…”

Section: J Compos Sci 2019 3 X 2 Of 40mentioning

confidence: 99%

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

2019

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Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

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“…[15,23] Meanwhile, the mechanical properties of natural fiber-reinforced materials are prone to viscoplastic deformation and time-dependence. [21,24] Furtado et al [25] simulated the aging process in outdoor application conditions under different environmental exposure levels by using the reduction of mechanical properties of natural fiber-reinforced composites in cyclic loading test. In the fatigue tests of flax-epoxy resins and other plant fiber composites, Mahboob and Bougherara [26] found that the strain amplitude response increased during the test period, indicating that the strain rate also increased during the fatigue life, which influenced the performance of the composite.…”

Section: Introductionmentioning

confidence: 99%

Viscoplastic deformation of cotton fabric‐reinforced polypropylene composites

Shao¹,

Wang

Qian³

et al. 2022

Polymer Composites

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In this work, cotton fabric‐reinforced polypropylene laminates (CFRLs) were prepared as an example to analyze the effect of viscoplastic deformation on the mechanical properties of natural fiber‐reinforced composites. Compared with neat polypropylene (PP), the tensile strength and modulus of CFRLs are significantly enhanced in all directions. However, CFRLs are more prone to plastic deformation than PP during static tensile tests. The tensile strength of CFRLs could be affected by the processing factors. As the drawing speed was reduced from 20 to 0.1 mm/min, the tensile strength of CFRLs decreased by 27%. Cyclic tensile tests were used to analyze the effect of viscoplastic deformation on the tensile strength of CFRLs, and the results showed that when the viscous deformation increased, the strain increased, leading to rapid fracture of CFRLs under cyclic tensile stress much lower than the tensile strength. By simulating the stress conditions of pressure vessels and pipes with different curved surfaces, CFRLs are shown to be more suitable for cylindrical curved structures, which has developable surface; While, they are not suitable for complex curved structures, such as spherical surfaces, that are undevelopable surface.

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Inverse characterization of vegetable fibre-reinforced composites exposed to environmental degradation

Cited by 18 publications

References 12 publications

Nonlinear tensile behavior of cotton fabric reinforced polypropylene composites

Nonlinear tensile behavior of cotton fabric reinforced polypropylene composites

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

Viscoplastic deformation of cotton fabric‐reinforced polypropylene composites

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