scholarly journals Short fiber‐reinforced oxide fiber composites

2021 ◽  
Author(s):  
Jonas Winkelbauer ◽  
Georg Puchas ◽  
Stefan Schafföner ◽  
Walter Krenkel
Keyword(s):  
Fiber Composites ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Oxide Fiber

Effects of hybridization and fiber orientation on flexural properties of hybrid short glass fiber– and short carbon fiber–reinforced vinyl ester composites

2018 ◽  
Vol 26 (5-6) ◽  
pp. 371-379 ◽  
Author(s):  
Muhammad Shafiq Irfan ◽  
Farhan Saeed ◽  
Yasir Qayyum Gill ◽  
Asif Ali Qaiser
Keyword(s):  
Fiber Orientation ◽  
Vinyl Ester ◽  
Hybrid Composites ◽  
Glass Fibers ◽  
Fiber Composites ◽  
Short Fiber ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Short Carbon ◽  
Short Glass

Short fiber–reinforced hybrid polymer (SFRHP) composites were prepared using short glass fibers (SGFs) and short carbon fibers (SCFs) as the reinforcements and vinyl ester resin as the matrix. The flexural properties of all-SGF, all-SCF, and SGF-SCF hybrid composites with controlled fiber orientation were found out experimentally and also predicted using rule of hybrid mixtures. Hand layup technique was used for the preparation of the composites. Composites with different patterns of fiber alignment were prepared and their properties were compared with randomly oriented short fiber composites. The results showed that the flexural performance of samples with longitudinal orientation of the fibers was significantly better than randomly oriented samples for all composites. Synergistic effect of hybridization (positive hybridization) with respect to flexural properties of SFRHP composites was obtained by controlling the orientation of the fibers. It was shown that the hybridization of fibers in the short fiber composites can provide economic savings.

THE EFFECT OF ALKALINE TREATMENT AND FIBER LENGTH ON PINEAPPLE LEAF FIBER REINFORCED POLY LACTIC ACID BIOCOMPOSITES

2017 ◽  
Vol 79 (5-2) ◽  
Author(s):  
Siti Nur Rabiatutadawiah Ramli ◽  
Siti Hajar Sheikh Md. Fadzullah ◽  
Zaleha Mustafa
Keyword(s):  
Lactic Acid ◽  
Fiber Length ◽  
Alkaline Treatment ◽  
Fiber Composites ◽  
Short Fiber ◽  
Poly Lactic Acid ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Pineapple Leaf Fiber ◽  
Leaf Fiber

The awareness of natural fibers as alternative materials to synthetic fibers in composite applications have increased briskly due to lightweight, non-toxic, low cost and abundantly available. To-date, there are still limited works on fully biodegradable composites also known as biocomposites, especially using long pineapple leaf fiber (PALF) reinforced poly lactic acid biocomposites. Thus, this study presents an investigation of the effects of alkaline treatment and use of different fiber length on the mechanical performance of pineapple leaf fibers reinforced poly lactic acid, biocomposites. Flexural testing was conducted via ASTM D790. The results showed enhancement in flexural properties of the biocomposites when the PALF fibers were treated with alkaline treatment, suggesting an effect of improving mechanical interlocking between matrix and reinforcement due to rougher fiber surface. The flexural strength and modulus of long treated fibers increased from 56.47 MPa and 4.24 GPa to 114.03 MPa and 5.70 GPa respectively compared to long untreated fibers.  In addition, the effect of fiber length is also proven to affect the overall performance of the biocomposites, in which the long PALF fiber composites exhibit superior flexural properties to those of the short fiber reinforced PLA biocomposites, i.e. flexural modulus of 5.7 GPa and 0.22 GPa for the long fiber composites and short fiber composites respectively. The existence of sodium hydroxide, (NaOH) on PALF fibers were confirmed by FTIR analysis. Surface morphology of both untreated and treated samples was studied by using a scanning electron microscope (SEM). Results from both analyses suggest removal of lignin and hemicellulose on the alkaline-treated PALF fiber reinforced composites led to a rougher fibers surface and formed a better fiber-matrix adhesion, as reflected in the flexural properties of the biocomposites as reported above.

scholarly journals Effect of Short Fiber Reinforcements on Fracture Performance of Cement-Based Materials: A Systematic Review Approach

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1745
Author(s):  
Waqas Ahmad ◽  
Mehran Khan ◽  
Piotr Smarzewski
Keyword(s):  
Graphical Representation ◽  
Safety Evaluation ◽  
Short Fiber ◽  
Research Trend ◽  
Scientometric Analysis ◽  
Fiber Reinforced ◽  
Factors Affecting ◽  
Fracture Properties ◽  
Cement Based Materials ◽  
Relevant Publication

Fracture characteristics were used to effectively evaluate the performance of fiber-reinforced cementitious composites. The fracture parameters provided the basis for crack stability analysis, service performance, safety evaluation, and protection. Much research has been carried out in the proposed study field over the previous two decades. Therefore, it was required to analyze the research trend from the available bibliometric data. In this study, the scientometric analysis and science mapping techniques were performed along with a comprehensive discussion to identify the relevant publication field, highly used keywords, most active authors, most cited articles, and regions with largest impact on the field of fracture properties of cement-based materials (CBMs). Furthermore, the characteristic of various fibers such as steel, polymeric, inorganic, and carbon fibers are discussed, and the factors affecting the fracture properties of fiber-reinforced CBMs (FRCBMs) are reviewed. In addition, future gaps are identified. The graphical representation based on the scientometric review could be helpful for research scholars from different countries in developing research cooperation, creating joint ventures, and exchanging innovative technologies and ideas.

scholarly journals Improvement of Performance Profile of Acrylic Based Polyester Bio-Composites by Bast/Basalt Fibers Hybridization for Automotive Applications

2021 ◽  
Vol 5 (4) ◽  
pp. 100
Author(s):  
Anjum Saleem ◽  
Luisa Medina ◽  
Mikael Skrifvars
Keyword(s):  
Hybrid Composites ◽  
Flexural Modulus ◽  
Basalt Fiber ◽  
Fiber Composites ◽  
Fiber Reinforced ◽  
Basalt Fibers ◽  
Bast Fiber ◽  
Bast Fibers ◽  
Resin Impregnation ◽  
Structural Applications

New technologies in the automotive industry require lightweight, environment-friendly, and mechanically strong materials. Bast fibers such as kenaf, flax, and hemp reinforced polymers are frequently used composites in semi-structural applications in industry. However, the low mechanical properties of bast fibers limit the applications of these composites in structural applications. The work presented here aims to enhance the mechanical property profile of bast fiber reinforced acrylic-based polyester resin composites by hybridization with basalt fibers. The hybridization was studied in three resin forms, solution, dispersion, and a mixture of solution and dispersion resin forms. The composites were prepared by established processing methods such as carding, resin impregnation, and compression molding. The composites were characterized for their mechanical (tensile, flexural, and Charpy impact strength), thermal, and morphological properties. The mechanical performance of hybrid bast/basalt fiber composites was significantly improved compared to their respective bast fiber composites. For hybrid composites, the specific flexural modulus and strength were on an average about 21 and 19% higher, specific tensile modulus and strength about 31 and 16% higher, respectively, and the specific impact energy was 13% higher than bast fiber reinforced composites. The statistical significance of the results was analyzed using one-way analysis of variance.

scholarly journals A computational modeling approach based on random fields for short fiber-reinforced composites with experimental verification by nanoindentation and tensile tests

2021 ◽  
Author(s):  
Natalie Rauter
Keyword(s):  
Numerical Simulations ◽  
Correlation Functions ◽  
Material Properties ◽  
Random Fields ◽  
Tensile Tests ◽  
Short Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Component Level

AbstractIn this study a modeling approach for short fiber-reinforced composites is presented which allows one to consider information from the microstructure of the compound while modeling on the component level. The proposed technique is based on the determination of correlation functions by the moving window method. Using these correlation functions random fields are generated by the Karhunen–Loève expansion. Linear elastic numerical simulations are conducted on the mesoscale and component level based on the probabilistic characteristics of the microstructure derived from a two-dimensional micrograph. The experimental validation by nanoindentation on the mesoscale shows good conformity with the numerical simulations. For the numerical modeling on the component level the comparison of experimentally obtained Young’s modulus by tensile tests with numerical simulations indicate that the presented approach requires three-dimensional information of the probabilistic characteristics of the microstructure. Using this information not only the overall material properties are approximated sufficiently, but also the local distribution of the material properties shows the same trend as the results of conducted tensile tests.

Data enriched lubrication force modeling for a mechanistic fiber simulation of short fiber-reinforced thermoplastics

2021 ◽  
Vol 33 (5) ◽  
pp. 053107
Author(s):  
Susanne K. Kugler ◽  
Abrahán Bechara ◽  
Hector Perez ◽  
Camilo Cruz ◽  
Armin Kech ◽  
...  
Keyword(s):  
Short Fiber ◽  
Fiber Reinforced ◽  
Force Modeling ◽  
Reinforced Thermoplastics ◽  
Fiber Reinforced Thermoplastics

Anisotropic Effective Moduli of Cracked Short-Fiber Reinforced Composites

1999 ◽  
Vol 66 (3) ◽  
pp. 709-713 ◽  
Author(s):  
R. S. Feltman ◽  
M. H. Santare
Keyword(s):  
Short Fiber ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Effective Moduli ◽  
Fiber Reinforced ◽  
Fiber Fracture ◽  
Composite Systems ◽  
Reinforced Composite ◽  
Anisotropic Elastic ◽  
Energy Dissipated

A model is presented to analyze the effect of fiber fracture on the anisotropic elastic properties of short-fiber reinforced composite materials. The effective moduli of the material are modeled using a self-consistent scheme which includes the calculated energy dissipated through the opening of a crack in an arbitrarily oriented elliptical inclusion. The model is an extension of previous works which have modeled isotropic properties of short-fiber reinforced composites with fiber breakage and anisotropic properties of monolithic materials with microcracks. Two-dimensional planar composite systems are considered. The model allows for the calculation of moduli under varying degrees of fiber alignment and damage orientation. In the results, both aligned fiber systems and randomly oriented fiber systems with damage-induced anisotropy are examined.

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