Temperature-Dependent Interfacial Debonding and Frictional Behavior of Fiber-Reinforced Polymer Composites

2019 ◽  
Vol 86 (9) ◽  
Author(s):  
Qiyang Li ◽  
Guodong Nian ◽  
Weiming Tao ◽  
Shaoxing Qu
Keyword(s):  
Linear Thermal Expansion ◽  
Fiber Reinforced Polymer ◽  
Frictional Stress ◽  
Material System ◽  
Fiber Reinforced ◽  
Interfacial Behavior ◽  
Temperature Dependent ◽  
Frictional Sliding ◽  
Reinforced Polymer ◽  
Wide Range

As fiber-reinforced polymer matrix composites are often cured from stress-free high temperature, when subjected to ambient temperature, both the mismatch of the coefficient of linear thermal expansion between the fiber and the matrix and the dependence of material properties on temperature will influence the interfacial behavior. Thus, it is necessary to provide an insight into the mechanism of temperature effects on the thermomechanical properties and behaviors along the interface. In this work, we conducted microbond tests of the glass fiber–epoxy material system at controlled testing temperature (Tt). A modified interface model is formulated and implemented to study the interfacial decohesion and frictional sliding behavior of microbond tests at different Tt. With proper cohesive parameters obtained, the model can predict temperature-dependent interfacial behaviors in fiber-reinforced composites. Both the slope of the peak force as well as the measured force at the stage of frictional sliding decrease with Tt in a wide range of the length of microdroplet-embedded fiber (le). The interfacial shear strength (IFSS) keeps almost constant at Tt ≤ 40 °C and decreases with le when temperature is above 40 °C. The average frictional stress (τfAverage) along the interface increases with le when temperature is below 80 °C but is almost constant when temperature is above or equal to 80 °C. Overall, in the same range of le, τfAverage is greater when Tt is at low temperature.

Acousto-Ultrasonic Technology for Nondestructive Evaluation of Concrete Bridge Members Strengthened by Carbon Fiber–Reinforced Polymer

2005 ◽  
Vol 1928 (1) ◽  
pp. 245-251 ◽  
Author(s):  
Mahmut Ekenel ◽  
Nestore Galati ◽  
John J. Myers ◽  
Antonio Nanni ◽  
Valery Godínez
Keyword(s):  
Carbon Fiber ◽  
Nondestructive Testing ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Ultrasonic Nondestructive Testing ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Wide Range ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber–reinforced polymer (CFRP) composites have been used in a wide range of application areas in bridge rehabilitations because these materials are less affected by corrosive environmental conditions, are known to provide longer life, and require less maintenance. However, the quality control and quality assessment of these new rehabilitation systems should be further improved and standardized. A recent rehabilitation project that used CFRP laminates was done on a bridge in Dallas County, Missouri, by the Missouri Department of Transportation and the Center for Infrastructure Engineering Studies at the University of Missouri–Rolla. The acousto-ultrasonic nondestructive testing technology was performed to detect and image surface defects in the form of delaminations. These were intentionally formed at the CFRP sheet–concrete interface to investigate the ability of this technique. Acousto-ultrasonic nondestructive testing has shown the ability to detect and image the delaminations between CFRP sheet and concrete substrate.

scholarly journals Towards the Development of Novel Hybrid Composite Steel Pipes: Electrochemical Evaluation of Fiber-Reinforced Polymer Layered Steel against Corrosion

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3805
Author(s):  
Fatima Ghassan Alabtah ◽  
Elsadig Mahdi ◽  
Faysal Fayez Eliyan ◽  
Elsadig Eltai ◽  
Marwan Khraisheh
Keyword(s):  
Polymer Coating ◽  
Electrochemical Impedance ◽  
Distribution Networks ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Acid Attack ◽  
Steel Pipes ◽  
Reinforced Polymer ◽  
Wide Range

Corrosion remains one of the major and most costly challenges faced by the steel industry. Various fiber-reinforced polymer coating systems have been proposed to protect metallic piping distribution networks against corrosion. Despite increasing interest among scientific and industrial communities, there is only limited predictive capability for selecting the optimum composite system for a given corrosive condition. In this study, we present a comprehensive evaluation of the electrochemical behavior of two different fiber-reinforced polymer composite systems against the corrosion of carbon steel pipes under a wide range of acidic and corrosive solutions. The composites were made of glass and Kevlar fibers with an epoxy resin matrix and were subjected to corrosive solutions of 0.5 M NaCl, 0.5 M HCl, and 0.5 M H2SO4. The kinetics of the corrosion reactions were evaluated using potentiodynamic polarization (PDP) tests. In addition, electrochemical impedance spectroscopy (EIS) tests were carried out at open circuit potentials (OCPs). It was demonstrated that the glass fiber-reinforced polymer coating system offered the best protection against corrosion, with a high stability against deterioration when compared with epoxy and Kevlar fiber-reinforced polymer coating systems. Scanning electron microscopy images revealed cracks and deteriorated embedded fibers due to acid attack, sustained/assisted by the diffusion of the corrosion species.

scholarly journals Novel Continuous Fiber Bi-Matrix Composite 3-D Printing Technology

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3011 ◽  
Author(s):  
Adi Adumitroaie ◽  
Fedor Antonov ◽  
Aleksey Khaziev ◽  
Andrey Azarov ◽  
Mikhail Golubev ◽  
...  
Keyword(s):  
Matrix Material ◽  
Fiber Reinforced Polymer ◽  
Material System ◽  
The Novel ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
New Paradigm ◽  
Fused Filament Fabrication ◽  
Reinforced Polymer ◽  
Mechanical Performances

A new paradigm in continuous fiber-reinforced polymer fused filament fabrication based on a thermoset-thermoplastic bi-matrix material system is proposed and proved. This totally new 3-D printing concept has the potential to overcome the drawbacks and to combine the advantages of separate thermoset and thermoplastic-based, fused filament fabrication methods and to advance continuous fiber-reinforced polymer 3-D printing toward higher mechanical performances of 3-D printed parts. The novel bi-matrix 3-D printing method and preliminary results related to the 3-D printed composite microstructure and performances are reported.

scholarly journals Experimentation on Mechanical Properties of Fiber Reinforced Polymer Composite Material

2020 ◽  
Vol 9 (3) ◽  
pp. 1028-1033
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Glass Fiber ◽  
Testing Machine ◽  
Fiber Reinforced Polymer ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Abrasive Resistance ◽  
Reinforced Polymer ◽  
Wide Range

The naturally available material such as Sisal has been using in several applications in fabricating composite materials due to its exceptional durability with a minimum wear and tear and due to its ability to stretch. Using sisal fiber as reinforcement to form sisal fiber reinforced polymer composites, strengthen the study of mechanical properties of the composites. In this project, we have enhanced the mechanical properties of the sisal/glass fiber incorporated with polyurethane. Polyurethane is an extremely versatile elastomer used in countless applications worldwide. It has some excellent properties like high abrasive resistance, wide range of hardness, high load bearing capacity, wide resilience range, flexibility, strong bonding properties which makes it an ideal choice in the field of composite preparation. In this study, the composite material is fabricated by mixing Polyurethane proportionally with the sisal/glass fiber. After the fabrication is done, it is planned to study the mechanical properties of the composite material using different testing tools like Universal Testing Machine, Izod test, and hardness tester.

Sign in / Sign up

Export Citation Format

Share Document