Analysis of impacts of thermal shocks on mechanical properties of E-glass fiber reinforced polyester composites

2021 ◽  
pp. 002199832110176
Author(s):  
Zahra Jamshidi ◽  
Sayyed Mahdi Hejazi ◽  
Mohammad Sheikhzadeh ◽  
Azam Alirezazadeh
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Glass Fiber ◽  
Woven Fabric ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Wide Range ◽  
Fiber Deformation ◽  
Polyester Composites ◽  
Thermal Shocks

Glass fiber reinforced polyester composites are economic and high-performance composite materialsthat has gained a wide range of applications. Besides the developments in composites design, scientific studies addressing the consequences of thermal changes on the mechanical properties of fiber reinforced polymer composites(FRPCs) are scarce. Therefore, the main aim of the present work is to investigate the physical/mechanical properties of glass fiber reinforced polyester composites under thermal shocks. The effects of thermal cycle duration (2, 5 and 20 hours) on the porosity and mechanical properties (maximum stress, strain, elastic modulus and impact resistance) of polymeric composites reinforced by glass fiber, woven fabric and copper/silica nanoparticles (NPs) were investigated. The results exhibited that the porosity and mechanical properties changed obviously in long duration cycles, i.e., 20 hours. Major reduction trends were observed when the fabric reinforced samples were further reinforced by NPs. It was concluded that although NPs reduce porosity and pose filling effect in composite matrix, can also provide stress concentration locations. The composites reinforced by woven fabric and prepared by RTM method provide better mechanical properties. Moreover, after thermal shocks, the fibers within the composite structure formed curved shapes. Consequently, a reduction occurred at the elastic modulus of fibrous reinforced composites (fiber or fabric) after thermal cycles. Besides theelevated porositywas the predominant factor reducing elastic modulus, fiber deformation was also considered as a hidden factor which has never been discussed in previous research studies. A model of bicomponent structure was used to explain the effects of fiber deformation on elastic modulus of the FRPCs.

scholarly journals Influence of Stacking Sequence on the Mechanical and Dynamic Mechanical Properties of Cotton/Glass Fiber Reinforced Polyester Composites

2016 ◽  
Vol 19 (3) ◽  
pp. 542-547 ◽  
Author(s):  
Emanoel Henrique Portella ◽  
Daiane Romanzini ◽  
Clarissa Coussirat Angrizani ◽  
Sandro Campos Amico ◽  
Ademir José Zattera
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Dynamic Mechanical Properties ◽  
Stacking Sequence ◽  
Fiber Reinforced ◽  
Dynamic Mechanical ◽  
Glass Fiber Reinforced ◽  
Polyester Composites

Fatigue and tensile behaviors of fiber-reinforced thermosetting composites embedded with nanoparticles

2018 ◽  
Vol 53 (6) ◽  
pp. 709-718 ◽  
Author(s):  
Moustafa Mahmoud Yousry Zaghloul ◽  
Yasser S Mohamed ◽  
Hassan El-Gamal
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Cellulose Nanocrystals ◽  
Testing Machine ◽  
Material Design ◽  
Fatigue Properties ◽  
Fiber Reinforced ◽  
Molding Process ◽  
Glass Fiber Reinforced ◽  
Wide Range

The development of studying nanocomposites has grown up rapidly in the last decade. The objective of the current research is to study the influence of incorporating cellulose nanocrystals on the mechanical properties of polyester resins, as well as to develop continuous filament e-glass fiber-reinforced polyester nanocomposites, which combine traditional composites with the added advantages of nanocomposites. Cellulose nanocrystals were uniformly dispersed into the polyester resin by an ultrasonic processor. The incorporation and dispersion of cellulose nanocrystals were a state-of-the-art method aimed at overcoming poor dispersion problems at low weight fractions of nanoparticles. Three weight percentages of cellulose nanocrystals were prepared, which were 2%, 4% and 6%. Fatigue and tensile specimens were manufactured by resin transfer molding process. Cellulose nanocrystals were fully characterized by using X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy and zeta-sizer analysis. The optimum incorporation percentage of cellulose nanocrystals was used to prepare glass fiber-reinforced polyester specimens containing cellulose nanocrystals. Tensile and fatigue behaviors of glass fiber-reinforced polyester composites were evaluated by means of universal testing machine and rotating bending fatigue machine. A series of testing specimens for each property was examined in accordance with the corresponding ASTM and JIS standards. The experimental results showed that the addition of 4% cellulose nanocrystals to polyester matrix lead to the optimum tensile and fatigue properties. Mechanical properties were improved through the enhanced material design and proper selection of compatible nanoparticles, and adding cellulose nanocrystals in a weight fraction that does not affect the mechanical properties of glass fiber-reinforced polyester nanocomposites negatively. The presented design of material and geometry have shown promising results for wide range of applications, particularly in biomedical industry, energy and electronics.

scholarly journals Experimental Investigation on Mechanical Properties of A/GFRP, B/GFRP and AB/GFRP Polymer Composites

2022 ◽  
Vol 58 (4) ◽  
pp. 28-36
Author(s):  
Velmurugan Natarajan ◽  
Ravi Samraj ◽  
Jayabalakrishnan Duraivelu ◽  
Prabhu Paulraj
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Polymer Composites ◽  
Fiber Reinforced ◽  
Gfrp Composites ◽  
Glass Fiber Reinforced ◽  
Structural Applications ◽  
Polyester Composites

This study aims to reveal the consequence of thickness reinforcement on Fiber Laminates (Polyester Resin, Glass Fiber, Aluminum, and Bentonite) and to see if it can enhance the mechanical properties and resistance of laminates. Glass fiber reinforced polymer composites have recently been used in automotive, aerospace, and structural applications where they will be safe for the application s unique shape. Hand layup was used to fabricate three different combinations, including Aluminium /Glass fiber reinforced polyester composites (A/GFRP), Bentonite/Glass fiber reinforced polyester composites (B/GFRP), and Aluminium&Bentonie/Glass fiber reinforced polyester composites (AB/GFRP). Results revealed that AB/GFRP had better tensile strength, flexural strength, and hardness than GFRP and A/GFRP. Under normal atmospheric conditions and after exposure to boiling water, hybrid Aluminium&Bentonite and glass fiber-reinforced nanocomposites have improved mechanical properties than other hybrid composites. After exposure to temperature, the flexural strength, tensile strength and stiffness of AB/GFRP Composites are 40 % higher than A/GFRP and 17.44% higher than B/GFRP Composites.

scholarly journals Examination of Mechanical Behavior of E-Glass Fabric Reinforced Polyester Composites

2019 ◽  
Vol 9 (2) ◽  
pp. 3450-3453
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Mechanical Behavior ◽  
Glass Fiber ◽  
Cooling System ◽  
Glass Fabric ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Polyester Composites ◽  
American Society

Cooling system this study aims at fabrication Glass Fiber Reinforced Polyester (G-P) Composites and investigation of their Physico-Mechanical Properties. In the present work Polyester based composites were fabricated manually by compression. Mechanical Properties are evaluated according to American Society for Testing and Materials (ASTM) D-638 and D-790 respectively. Further, Surface Morphology is emphasized to study their microstructure under varying magnifications.

scholarly journals Influence of Thermal Shocks on Residual Static Strength, Impact Strength and Elasticity of Polymer-Composite Materials Used in Firefighting Helmets

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 57
Author(s):  
Daniel Pieniak ◽  
Agata Walczak ◽  
Marcin Oszust ◽  
Krzysztof Przystupa ◽  
Renata Kamocka-Bronisz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Glass Fiber ◽  
Elastic Properties ◽  
Polymer Composite ◽  
Experimental Studies ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
The Impact ◽  
Thermal Shocks

The article presents results of experimental studies on mechanical properties of the polymer-composite material used in manufacturing firefighting helmets. Conducted studies included static and impact strength tests, as well as a shock absorption test of glass fiber-reinforced polyamide 66 (PA66) samples and firefighting helmets. Samples were subject to the impact of thermal shocks before or during being placed under a mechanical load. A significant influence of thermal shocks on mechanical properties of glass fiber-reinforced PA66 was shown. The decrease in strength and elastic properties after cyclic heat shocks ranged from a few to several dozen percent. The average bending strength and modulus during the 170 degree Celsius shock dropped to several dozen percent from the room temperature strength. Under these thermal conditions, the impact strength was lost, and the lateral deflection of the helmet shells increased by approximately 300%. Moreover, while forcing a thermal shock occurring during the heat load, it was noticed that the character of a composite damage changes from the elasto-brittle type into the elasto-plastic one. It was also proved that changes in mechanical and elastic properties of the material used in a helmet shell can affect the protective abilities of a helmet.

Mechanical properties of graphene oxide coated-glass fiber reinforced unsaturated polyester composites

2019 ◽  
Vol 6 (11) ◽  
pp. 115303 ◽  
Author(s):  
Mohsin Ali Raza ◽  
Muhammad Mujddid ◽  
Mohsin Hussain ◽  
Hafiz Qasim Ali ◽  
Zaeem Ur Rehman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Glass Fiber ◽  
Unsaturated Polyester ◽  
Fiber Reinforced ◽  
Coated Glass ◽  
Glass Fiber Reinforced ◽  
Polyester Composites
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