Tensile properties of glass fiber‐reinforced polyester composites at extreme cold temperatures

Ahmed, Saad R.; Khanna, Sanjeev K.

doi:10.1002/pc.25668

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…The PGF fibers were well dispersed in the polyester matrix due to the compatibility of the phosphate glass fibers with the polyester matrix. Erden [ 39 ] studied the morphology of glass fiber-polyester composites using SEM and found a fiber pull-out failure phenomenon in the case of glass fiber-reinforced polyester composite. moreover, they observed a very small amount of polyester resin adhered and wetted on the surfaces of glass fibers in the fracture zone of the composite, and the presence of glass agglomerates and microvoids in the composites indicating the poor interfacial bonding between the polyester matrix and the fibers.…”

Section: Resultsmentioning

confidence: 99%

Development and Characterization of Phosphate Glass Fibers and Their Application in the Reinforcement of Polyester Matrix Composites

et al. 2022

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This study focused on the production and characterization of phosphate glass fibers (PGF) for application as composite reinforcement. Phosphate glasses belonging to the system 52P2O524CaO13MgO (11-(X + Y)) K2OXFe2O3YTiO2 (X:1, 3, 5) and (Y:0.5, 1) were elaborated and converted to phosphate glass fibers. First, their mechanical properties and chemical durability were investigated. Then, the optimized PGF compositions were used afterward as reinforcement for thermosetting composite materials. Polyester matrices reinforced with short phosphate glass fibers (sPGF) up to 20 wt % were manufactured by the contact molding process. The mechanical and morphological properties of different sPGF-reinforced polyester systems were evaluated. The choice between the different phosphate-based glass syntheses (PGFs) was determined by their superior mechanical performance, their interesting chemical durability, and their high level of dispersion in the polyester matrix without any ad sizing as proven by SEM morphological analysis. Moreover, the characterization of mechanical properties revealed that the tensile and flexural moduli of the developed polyester-based composites were improved by increasing the sPGF content in the polymer matrix in perfect agreement with Takayanagi model predictions. The present work thus highlights some promising results to obtain high-quality phosphate glass fiber-reinforced polyester parts which can be transposed to other thermosetting or thermoplastic-based composites for high-value applications.

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Section: Resultsmentioning

confidence: 99%

Development and Characterization of Phosphate Glass Fibers and Their Application in the Reinforcement of Polyester Matrix Composites

et al. 2022

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“…1 Furthermore, reliable mechanical models of FRPCs for the design of structural components demand knowledge of their tridimensional mechanical properties as input data. In-plane elastic properties have been extensively studied, [2][3][4] and standardized test methods for tensile, 5 compressive, 6 and shear 7,8 properties exist. However, TT mechanical testing of FRPC materials is more challenging and limited test data and analysis of test specimens exist.…”

Section: Introductionmentioning

confidence: 99%

Through‐thickness tensile characterization and analysis of fiber‐reinforced polymer composites using digital image correlation and finite element modeling

Ayuso‐Faber,

Uribe‐Riestra,

Arana

et al. 2023

Polymer Composites

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Digital image correlation (DIC) and finite element analysis (FEA) are used to assess the cylindrical spool‐shaped ASTM D7291 and I‐beam‐shaped specimens for through‐thickness (TT) mechanical characterization of thick (~25 mm) fiber reinforced polymer matrix composites. The composites are made of E‐glass woven fabrics reinforcing a vinyl ester matrix. DIC full‐field measurements and FEA showed a rather uniform strain distribution within the gage section of the ASTM D7291 specimen. However, strain concentrations are revealed at the bondlines between the end‐tabs and the test specimen, in addition to strain gradients at the curved section of the specimen. DIC‐measured and FEA‐predicted strain fields of the I‐beam specimens exhibited a region of uniform strain distribution within the gage section larger than that of the ASTM D7291 specimen. Nevertheless, high stress concentrations at the fillet (curved flange‐to‐web transition) regions and some amount of web bending occur in the I‐beam specimen. Beyond providing the TT mechanical properties of the E‐glass woven/vinyl ester composites, the current work discusses advantages and caveats of both promising specimens, providing quantifications of stress concentration factors and length of zones were strains and stresses may be considered uniform.Highlights Stress/strain distributions of through‐thickness tensile specimens are evaluated. The main drawback of the spool‐shaped specimen is adhesive failure. The modified I‐beam specimen shows acceptable stress concentration factors. The modified I‐beam is adequate for strength and Poisson ratio characterization. I‐beam specimens are easier to manufacture and do not require adhesive joints.

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“…In cold regions, the geocell is in a low temperature state for long periods. As an organic polymer material, geocell is different in sensitivity to temperature when its material is different [ 33 , 34 ]. In low temperatures, the change mechanism of material properties is not clear.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature

Bai

He²,

Wang

et al. 2022

Materials

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Geocell is widely used in the treatment of poor roadbed, which can restrain soil laterally and improve the stability of soil. In cold area engineering, a change in temperature can influence the mechanical properties of geocell of different materials. To study the mechanical response of geocell at low temperatures, three types of geocell strips commonly used in engineering, namely the polyethylene (HDPE), polypropylene (PP), and polyester (PET), were studied via the uniaxial tensile test at the ambient temperatures of −5 °C, −20 °C, and −35 °C, respectively. Meanwhile, the tensile strength, fracture mode, and temperature sensitivity of geocell specimens were compared. It is concluded that: (1) at low temperatures, the tensile strengths of HDPE and PET geocell strips are significantly improved, while that of the PP geocell strip is less sensitive to the temperature. (2) The PP geocell is subject to a brittle failure at all ambient temperatures. The PET geocell strip experiences a hard-ductile failure at normal temperatures of −5 °C and −20 °C. While in the tensile test at −35 °C, it is prone to brittle failure and hard-ductile failure. The HDPE geocell strip suffers from ductile failure at all ambient temperatures. (3) At low temperatures, overall, the tensile properties of the PET geocell strip is better than those of the PP and HDPE geocell strips.

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Tensile properties of glass fiber‐reinforced polyester composites at extreme cold temperatures

Cited by 4 publications

References 18 publications

Development and Characterization of Phosphate Glass Fibers and Their Application in the Reinforcement of Polyester Matrix Composites

Development and Characterization of Phosphate Glass Fibers and Their Application in the Reinforcement of Polyester Matrix Composites

Through‐thickness tensile characterization and analysis of fiber‐reinforced polymer composites using digital image correlation and finite element modeling

Experimental Investigation on Mechanical Properties of Geocell Strips at Low Temperature

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