Catalytic, Aerobic Depolymerization of Epoxy Thermoset Composites

2021 ◽  
Author(s):  
Carlos A. Navarro ◽  
Yijia Ma ◽  
Katelyn Michael ◽  
Hanna Breunig ◽  
Steven Nutt ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
High Performance ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Aerobic Conditions ◽  
Thermoset Composites ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

We present here catalytic, aerobic conditions for depolymerization of amine-linked epoxy thermoset matrix polymers commonly used in the carbon fiber-reinforced polymer (CFRP) materials that serve high-performance applications such as aerospace,...

scholarly journals Carbon fiber reinforced polymer (CFRP) inserted in different configurations of the tensile zone retrofitting with microconcrete containing steel fibers to the strengthening of beams

2016 ◽  
Vol 38 (4) ◽  
pp. 437
Author(s):  
Vladimir José Ferrari ◽  
Ana Paula Arquez ◽  
João Bento de Hanai
Keyword(s):  
Carbon Fiber ◽  
High Performance ◽  
Steel Fibers ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Near Surface ◽  
Reinforced Polymer ◽  
Tensile Zone ◽  
Carbon Fiber Reinforced

It is researched, in this study, the strengthening technique known as Near Surface Mounted (NSM), which consists of the insertion of laminates of Carbon Fiber Reinforced Polymer (CFRP) into notches in the covering concrete structures. In the strengthening in beams, the tensile zone is found damaged for several reasons (cracking and corrosion, for instance), which demands, in the practice of engineering, its preliminary retrofitting. It should be considered that the good performance of the material used in this retrofitting is fundamental for a higher efficiency of the strengthening. Therefore, it is proposed a methodology that consists of the reconstitution of the tensile zone of the beams with a cement-based composite of high performance (CCAD), which acts as a substrate for the application of CFRP and as an element for the transfer of efforts to the part strengthened. The retrofitting of this tensile zone was performed only in the shear span, as well as throughout of the zone with a view to evaluating the influence of this aspect on the performance of the beams. The CCAD, produced from Portland cement, steel fibers and microfibers, was evaluated using the Rilem (2002), showed to be able to delay the cracking. Tests performed in the beams with the tensile zone retrofitting by CCAD and strengthening using the technique NSM showed the efficiency of the proposed methodology.

New unibody clamp anchors for post-tensioning carbon-fiber-reinforced polymer rods

PCI Journal ◽  
2014 ◽  
Vol 59 (1) ◽  
pp. 103-113 ◽  
Author(s):  
Clayton A. Burningham ◽  
Chris P. Pantelides ◽  
Lawrence D. Reaveley
Keyword(s):  
Carbon Fiber ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
Post Tensioning ◽  
Polymer Rods

Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips

2019 ◽  
Vol 7 (1) ◽  
pp. 30-34
Author(s):  
A. Ajwad ◽  
U. Ilyas ◽  
N. Khadim ◽  
Abdullah ◽  
M.U. Rashid ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Control Beam ◽  
Reinforced Polymer ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.

Basic Design of High-Speed Riverine Craft Made of Carbon Fiber Reinforced Polymer

2020 ◽  
Vol 57 (4) ◽  
pp. 241-253
Author(s):  
Zhiqiang Han ◽  
Jung-kyu Choi ◽  
Inhyuck Hwang ◽  
Jinyoung Kim ◽  
Daekyun Oh
Keyword(s):  
Carbon Fiber ◽  
High Speed ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Basic Design ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

High thermal conductivity carbon fiber reinforced polymer based on a carbon fiber from pitch and dispersed-filled ENPB matrix

2018 ◽  
pp. 130-137
Author(s):  
E. A. Nikolaeva ◽  
A. N. Timofeev ◽  
K. V. Mikhaylovskiy
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
High Thermal Conductivity ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Carbon Powder ◽  
Fiber Reinforced ◽  
Thermophysical Characteristics ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

This article describes the results of the development of a high thermal conductivity carbon fiber reinforced polymer based on carbon fiber from pitch and an ENPB matrix modified with a carbon powder of high thermal conductivity. Data of the technological scheme of production and the results of determining the physicomechanical and thermophysical characteristics of carbon fiber reinforced polymer are presented. 

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