EFFECTS OF SURFACE CHARACTERISTICS ON MECHANICAL AND DIELECTRIC PROPERTIES OF ADHESIVELY BONDED CARBON FIBER COMPOSITES

2021 ◽  
Author(s):  
MINHAZUR RAHMAN ◽  
GAYATHRI KOLA ◽  
MONJUR MORSHED RABBY ◽  
MUTHU RAM PRABHU ELENCHEZHIAN ◽  
RELEBOHILE GEORGE QHOBOSHEANE ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Surface Characteristics ◽  
The State ◽  
Fiber Reinforced Composites ◽  
Carbon Fiber Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Bond Performance ◽  
Lap Shear

The rapid rise of fiber reinforced composite usage in aircraft, spacecraft and automobile industries made the proper comprehension of repair and joining of these materials a crucial aspect. Adhesive bonding is one of the most advantageous and desirable joining and repair technique for fiber reinforced composites. However, the heterogeneity of fiber reinforced composites and the complex interfacial nature of the adhesive bonds, makes most non-destructive evaluation and assessment techniques ineffective to assess the state of the bond. Different manufacturing and surface preparation techniques impart different surface characteristics to the adherends, hence proper understanding of the state of bonds is dependent upon the characteristics of the adherend surfaces. In this approach, carbon fiber composite adherends with controlled surface modifications were made into lap-shear test specimens using film adhesive. The effects of surface characteristics such as surface roughness and surface free energy of the adherend surfaces, on bond performance are studied. These surface characteristics are found to be an indicator of bond performance and can even be used to explain failure modes. Moreover, the performance of these bonds with varying surface characteristics are analyzed non-destructively by dielectric spectroscopy and compared with the mechanical performance of the bonds.

scholarly journals Bisphenyl-Polymer/Carbon-Fiber-Reinforced Composite Compared to Titanium Alloy Bone Implant

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Richard C. Petersen
Keyword(s):  
Titanium Alloy ◽  
Carbon Fiber ◽  
Polymer Processing ◽  
Fiber Reinforced Composites ◽  
Carbon Fiber Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Implant Surface ◽  
Carbon Fiber Reinforced Composites ◽  
Carbon Fiber Reinforced

Aerospace/aeronautical thermoset bisphenyl-polymer/carbon-fiber-reinforced composites are considered as new advanced materials to replace metal bone implants. In addition to well-recognized nonpolar chemistry with related bisphenol-polymer estrogenic factors, carbon-fiber-reinforced composites can offer densities and electrical conductivity/resistivity properties close to bone with strengths much higher than metals on a per-weight basis.In vivobone-marrow tests with Sprague-Dawley rats revealed far-reaching significant osseoconductivity increases from bisphenyl-polymer/carbon-fiber composites when compared to state-of-the-art titanium-6-4 alloy controls. Midtibial percent bone area measured from the implant surface increased when comparing the titanium alloy to the polymer composite from 10.5% to 41.6% at 0.8 mm,P<10−4, and 19.3% to 77.7% at 0.1 mm,P<10−8. Carbon-fiber fragments planned to occur in the test designs, instead of producing an inflammation, stimulated bone formation and increased bone integration to the implant. In addition, low-thermal polymer processing allows incorporation of minerals and pharmaceuticals for future major tissue-engineering potential.

Applications of Composites on Textile Machinery

2011 ◽  
Vol 233-235 ◽  
pp. 1222-1226
Author(s):  
Sai Nan Wei ◽  
Li Chen
Keyword(s):  
Carbon Fiber ◽  
High Speed ◽  
Rational Design ◽  
Fiber Composite ◽  
Rapid Development ◽  
Fiber Reinforced Composites ◽  
High Price ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Composite

High performance fiber reinforced composites have a long history and wide usage in aerospace, sports, military, etc. In this paper applications of composites on textile machinery were elaborated, such as carbon-fiber reinforced plastic (CFRP) guide bar, composite rapier belt and rapier head in rapier loom, nylon shuttle, carbon fiber composite heddle frame for high-speed looms, transmission shaft, needle bed, conveyor belts. It indicated that the composites can improve the performance obviously. Along with the rapid development of textile, fiber reinforced composites are continuous replacing the traditional materials as cast iron, steel and aluminum textile machine parts, But the applications of composites on textile machinery are still in the initial stage. High price is the major obstruction factor for its development. Through improving the level of automation technology, reducing producing cost, rational design of structure, the producing cost can be sharply reduced, which is also benefit for textile machinery development.

scholarly journals 3D-Printed Carbon Fiber Reinforced Polymer Composites: A Systematic Review

2020 ◽  
Vol 4 (3) ◽  
pp. 98 ◽  
Author(s):  
Seyed Hamid Reza Sanei ◽  
Diana Popescu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
3D Printing ◽  
Fiber Orientation ◽  
Fiber Reinforced Composites ◽  
Carbon Fiber Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
3D Printed ◽  
Carbon Fiber Reinforced

Fiber reinforced composites offer exceptional directional mechanical properties, and combining their advantages with the capability of 3D printing has resulted in many innovative research fronts. This review aims to summarize the methods and findings of research conducted on 3D-printed carbon fiber reinforced composites. The review is focused on commercially available printers and filaments, as their results are reproducible and the findings can be applied to functional parts. As the process parameters can be readily changed in preparation of a 3D-printed part, it has been the focus of many studies. In addition to typical composite driving factors such as fiber orientation, fiber volume fraction and stacking sequence, printing parameters such as infill density, infill pattern, nozzle speed, layer thickness, built orientation, nozzle and bed temperatures have shown to influence mechanical properties. Due to the unique advantages of 3D printing, in addition to conventional unidirectional fiber orientation, concentric fiber rings have been used to optimize the mechanical performance of a part. This review surveys the literature in 3D printing of chopped and continuous carbon fiber composites to provide a reference for the state-of-the-art efforts, existing limitations and new research frontiers.

scholarly journals Enhanced Impact Properties of Hybrid Composites Reinforced by Carbon Fiber and Polyimide Fiber

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2599
Author(s):  
Boyao Wang ◽  
Bin He ◽  
Zhanwen Wang ◽  
Shengli Qi ◽  
Daijun Zhang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Failure Modes ◽  
Flexural Modulus ◽  
Charpy Impact ◽  
Fiber Reinforced Composites ◽  
Stacking Sequence ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Polyimide Fiber

A series of hybrid fiber-reinforced composites were prepared with polyimide fiber and carbon fiber as the reinforcement and epoxy resin as the matrix. The influence of stacking sequence on the Charpy impact and flexural properties of the composites as well as the failure modes were studied. The results showed that hybrid fiber-reinforced composites yielded nearly 50% increment in Charpy impact strength compared with the ones reinforced by carbon fiber. The flexural performance was significantly improved compared with those reinforced solely by polyimide fibers and was greatly affected by the stacking sequence. The specimens with compressive sides distributed with carbon fiber possessed higher flexural strength, while those holding a sandwich-like structure with carbon fiber filling between the outer layers displayed a higher flexural modulus.

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