scholarly journals Mechanical behavior of transparent fiber reinforced polyester composites at extreme temperatures

2018 ◽  
Author(s):  
◽  
Saad Ramadhan Ahmed
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Fiber Reinforced Polymers ◽  
Extreme Conditions ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
The Impact

Selecting materials for harsh or extreme environmental conditions can be a challenge. The combination of a harsh environment, large forces over extended periods and the need for lowest possible cost restricts the choice of materials. One potential material is glass fiber reinforced polymers that are widely used in structural systems as load bearing elements, they are relatively low cost and can be tailored to achieve a range of mechanical properties. This investigation presents the preparation of transparent glass fiber reinforced unsaturated polyester composite and the evaluation of its optical and mechanical properties under extreme conditions of temperature. The polyester resin was reinforced with E-glass fibers to manufacture a composite using the hand layup method. Transparency was achieved by modifying the refractive index of the polyester resin to match that of the glass fibers. This investigation also presents the evaluation of glass fiber reinforced unsaturated polyester under quasi-static tension loading and puncture testing using a drop weight at extreme conditions. The results showed that the reinforced composite had a higher fracture stress and chord modulus at all temperatures ranging from +60 [degree]C to -80 [degree]C as compared to the unreinforced polyester matrix. The unreinforced polyester has a higher stiffness at lower temperatures due to reduced polymer chain mobility and higher clamping pressure of the matrix on the glass fiber reinforcement. The damage created by the impact reduces with decreasing temperatures, while the energy absorb remains constant with temperature.

scholarly journals Mechanical Properties of Longitudinal Basalt/Woven-Glass-Fiber-reinforced Unsaturated Polyester-Resin Hybrid Composites

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2211
Author(s):  
S.M. Sapuan ◽  
H.S. Aulia ◽  
R.A. Ilyas ◽  
A. Atiqah ◽  
T.T. Dele-Afolabi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Polyester Resin ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Unsaturated Polyester Resin ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Woven Glass Fiber

This work represents a study to investigate the mechanical properties of longitudinal basalt/woven-glass-fiber-reinforced unsaturated polyester-resin hybrid composites. The hybridization of basalt and glass fiber enhanced the mechanical properties of hybrid composites. The unsaturated polyester resin (UP), basalt (B) and glass fibers (GF) were fabricated using the hand lay-up method in six formulations (UP, GF, B7.5/G22.5, B15/G15, B22.5/G7.5 and B) to produce the composites, respectively. This study showed that the addition of basalt to glass-fiber-reinforced unsaturated polyester resin increased its density, tensile and flexural properties. The tensile strength of the B22.5/G7.5 hybrid composites increased by 213.92 MPa compared to neat UP, which was 8.14 MPa. Scanning electron microscopy analysis was used to observe the fracture mode and fiber pullout of the hybrid composites.

Fabrication and Characterization of E-Glass Fiber Reinforced Unsaturated Polyester Resin Based Composite Materials

2019 ◽  
Vol 24 ◽  
pp. 1-7
Author(s):  
Md. Naimul Islam ◽  
Harun Ar-Rashid ◽  
Farhana Islam ◽  
Nanda Karmaker ◽  
Farjana A. Koly ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Bending Strength ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Tensile Modulus ◽  
Unsaturated Polyester Resin ◽  
Fiber Reinforced ◽  
Bending Modulus

E-glass fiber mat reinforced Unsaturated Polyester Resin (UPR)-based composites were fabricated by conventional hand lay-up technique. The fiber content was varied from 5 to 50% by weight. Mechanical properties (tensile and bending) of the fabricated composites were investigated. The tensile strength (TS) of the 5% and 50% fiber reinforced composites was 32 MPa and 72 MPa, respectively. Similarly, tensile modulus, bending strength and bending modulus of the composites were increased by the increase of fiber loading. Interfacial properties of the composites were investigated by scanning electron microscopy (SEM) and the results revealed that the interfacial bond between fiber and matrix was excellent. Keywords: Unsaturated Polyester Resin, Mechanical Properties, E-glass Fibers, Composites, Polymer.

Mechanical properties of norbornene-based silane treated glass fiber reinforced polydicyclopentadiene composites manufactured by the S-RIM process

e-Polymers ◽  
2017 ◽  
Vol 17 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Hyeong Min Yoo ◽  
Dong-Jun Kwon ◽  
Joung-Man Park ◽  
Sang Hyuk Yum ◽  
Woo Il Lee
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Glass Fibers ◽  
Process Conditions ◽  
Fiber Reinforced ◽  
Scanning Calorimetry ◽  
Reaction Injection Molding ◽  
Structural Reaction Injection Molding ◽  
Pull Out ◽  
Glass Fiber Reinforced

AbstractA lab scale structural reaction injection molding (S-RIM) piece of equipment was designed and used to fabricate glass fiber reinforced polydicyclopentadiene (p-DCPD) composites for three different fiber contents. In order to obtain information regarding the optimal process temperature (>80°C) and the curing time (<30 s), differential scanning calorimetry (DSC) was used to investigate the curing behavior of DCPD resin under isothermal conditions. Further, a norbornene-based silane treatment was used to improve the interfacial adhesion between the glass fibers and DCPD as confirmed by the micro-droplet pull-out test and scanning electron microscopy (SEM). Fabrication of glass fiber/p-DCPD composites with improved mechanical properties was carried out based on the optimized process conditions and surface treatment of glass fiber.

Modelling and Analysis of Wear Prediction in Machining of Nano Based GFRP Composites Using RSM

2015 ◽  
Vol 20 ◽  
pp. 3-11
Author(s):  
A. Saravanapandi Solairajan ◽  
S. Alexraj ◽  
P. Vijaya Rajan ◽  
Godwin Jose
Keyword(s):  
Glass Fiber ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Cutting Speed ◽  
Polycrystalline Diamond ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Fiber Reinforced ◽  
Gfrp Composites ◽  
Glass Fiber Reinforced

Glass fiber reinforced composite material was fabricated using E-glass fiber with unsaturated polyester resin. In Glass Fiber Reinforced Plastic (GFRP) composites, the matrix of polymer is reinforced with glass fibers. The surface quality and dimensional precision significantly affect the parts during their suitable life, particularly in cases where the components come in contact with other elements or materials. In the current study, GFRP is machined with two cases i.e. with and without Nano combinations in lathe. These machining studies were carried out on lathe using three different cutting tools: namely Carbide (K-20), Cubic Boron Nitrate (CBN) and Polycrystalline Diamond (PCD). The cutting parameters considered were cutting speed, feed, and depth of cut. Surface Finish is the most important parameter measured by main spindle and compares the value with another. A second order mathematical model in terms of cutting parameters was developed using RSM. The results specify the developed model is suitable for prediction of surface roughness in machining of GFRP composites.

scholarly journals Long Chopped Glass Fiber Reinforced Low-Density Unsaturated Polyester Resin under Different Initiation

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7307
Author(s):  
Xinjun Fu ◽  
Xiaojun Wang ◽  
Jinjian Zhu ◽  
Minzhuang Chen
Keyword(s):  
Glass Fiber ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Three Dimensional ◽  
Unsaturated Polyester Resin ◽  
Curing Temperature ◽  
Low Density ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Composite Samples

Long chopped glass fiber reinforced low-density unsaturated polyester resin (LCGFR-LDUPR) composite materials with light weight and excellent mechanical properties were prepared. It was proved that long chopped glass fiber, which was in length of 15.0 mm and chopped from ER4800-T718 plied yarn, was suitable for the preparation of LCGFR-LDUPR composite samples. With the coexistence of 1.50 parts per hundred of resin (phr) of methyl ethyl ketone peroxide (MEKP-II) and 0.05 phr of cobalt naphthenate, optimal preparation parameters were obtained, which were 20.00 phr of long chopped glass fiber, 2.50 phr of NH4HCO3, at a curing temperature of 58.0 °C. The lowest dosage of activated radicals produced by MEKP-II and cobalt naphthenate enabled the lower curing exothermic enthalpy and the slowest crosslinking for unsaturated polyester resin to carry out, resulting in a higher curing degree of resin. It was conducive to the formation, diffusion, and distribution of bubbles in uniform size, and also for the constitution of ideal three-dimensional framework of long glass fibers in the cured sample, which resulted in the LCGFR-LDUPR composite sample presenting the apparent density (ρ) of 0.68 ± 0.02 g/cm3, the compression strength (P) of 35.36 ± 0.38 MPa, and the highest specific compressive strength (Ps) of 52.00 ± 0.74 MPa/g·cm3. The work carried out an ideal three-dimensional framework of long chopped glass fiber in the reinforcement to low-density unsaturated polyester resin composite samples. It also presented the proper initiator/accelerator system of the lower curing exothermic enthalpy and the slowest crosslinking for unsaturated polyester resin.

scholarly journals Additive Re-Manufacturing of Mechanically Recycled End-of-Life Glass Fiber-Reinforced Polymers for Value-Added Circular Design

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3545
Author(s):  
Alessia Romani ◽  
Andrea Mantelli ◽  
Raffaella Suriano ◽  
Marinella Levi ◽  
Stefano Turri
Keyword(s):  
Additive Manufacturing ◽  
Glass Fiber ◽  
End Of Life ◽  
Glass Fibers ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Glass Fiber Reinforced Polymers ◽  
Glass Fiber Reinforced ◽  
Circular Design

Despite the large use of composites for industrial applications, their end-of-life management is still an open issue for manufacturing, especially in the wind energy sector. Additive manufacturing technology has been emerging as a solution, enhancing circular economy models, and using recycled composites for glass fiber-reinforced polymers is spreading as a new additive manufacturing trend. Nevertheless, their mechanical properties are still not comparable to pristine materials. The purpose of this paper is to examine the additive re-manufacturing of end-of-life glass fiber composites with mechanical performances that are comparable to virgin glass fiber-reinforced materials. Through a systematic characterization of the recyclate, requirements of the filler for the liquid deposition modeling process were identified. Printability and material surface quality of different formulations were analyzed using a low-cost modified 3D printer. Two hypothetical design concepts were also manufactured to validate the field of application. Furthermore, an understanding of the mechanical behavior was accomplished by means of tensile tests, and the results were compared with a benchmark formulation with virgin glass fibers. Mechanically recycled glass fibers show the capability to substitute pristine fillers, unlocking their use for new fields of application.

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