Fabrication, Modeling and Characterization of Magnetostrictive Short Fiber Composites

Magnetostrictive materials have a wide variety of applications due to their great capability as sensors and energy-harvesting devices. However, their brittleness inhibits their applications as magnetostrictive devices. Recently, we developed a continuous magnetostrictive Fe-Co-fiber-embedded epoxy matrix composite to increase the flexibility of the material. In this study, we fabricated random magnetostrictive Fe-Co short fiber/epoxy composite sheets. It was found that the discontinuous Fe-Co fiber composite sheet has the magnetostrictive properties along the orientation parallel to the length of the sheet. Finite element computations were also carried out using a coupled magneto-mechanical model, for the representative volume element (RVE) of unidirectional aligned magnetostrictive short fiber composites. A simple model of two-dimensional, randomly oriented, magnetostrictive short fiber composites was then proposed and the effective piezomagnetic coefficient was determined. It was shown that the present model is very accurate yet relatively simple to predict the piezomagnetic coefficient of magnetostrictive short fiber composites. This magnetostrictive composite sheet is expected to be used as a flexible smart material.

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Characterization of orientation clustering in short-fiber composites

Journal of Polymer Science Part B Polymer Physics ◽

10.1002/polb.1990.090281312 ◽

1990 ◽

Vol 28 (13) ◽

pp. 2651-2672 ◽

Cited By ~ 30

Author(s):

Sridhar Ranganathan ◽

Suresh G. Advani

Keyword(s):

Fiber Composites ◽

Short Fiber

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Study on the flexure performance of fine concrete sheets reinforced with textile and short fiber composites

MATEC Web of Conferences ◽

10.1051/matecconf/201927502006 ◽

2019 ◽

Vol 275 ◽

pp. 02006

Author(s):

Qiao-chu Yang ◽

Qin Zhang ◽

Su-su Gong ◽

San-ya Li

Keyword(s):

Glass Fiber ◽

Fiber Composite ◽

Basalt Fiber ◽

Fiber Composites ◽

Short Fiber ◽

Calcium Carbonate Whisker ◽

Flexural Tests ◽

Short Fiber Composite ◽

Fiber Mesh ◽

Concrete Matrix

In order to study the influences of the contents of short fiber on the mechanical properties of concrete matrix, the properties of compressive, flexure and splitting of concrete matrix reinforced by alkali resistant glass fiber and calcium carbonate whisker were tested. To study the reinforced effect of different scale fibers on the flexure behavior of fine concrete sheets, the flexural tests of concrete sheet of fine concrete reinforced with basalt fiber mesh and short fiber composites were carried out. The results show that the properties of the compressive, flexure and splitting of fine concrete reinforced with appropriate amount of alkali resistant glass fiber and carbonate whisker are improved compared with that of concrete reinforced by one type of fiber. The flexure properties of the concrete sheets are improved obviously when continuous fiber textile and short fiber composite are adopted to reinforce.

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A Mechanistic Approach to Matrix Cracking Coupled with Fiber–Matrix Debonding in Short-Fiber Composites

Journal of Engineering Materials and Technology ◽

10.1115/1.1924565 ◽

2005 ◽

Vol 127 (3) ◽

pp. 337-350 ◽

Cited By ~ 20

Author(s):

Ba Nghiep Nguyen ◽

Brian J. Tucker ◽

Mohammad A. Khaleel

Keyword(s):

Damage Mechanics ◽

Fiber Composite ◽

Fiber Composites ◽

Short Fiber ◽

Matrix Cracking ◽

Element Analysis ◽

Pull Out ◽

Stiffness Reduction ◽

Mechanistic Approach ◽

Fiber Matrix

A micro–macro mechanistic approach to damage in short-fiber composites is developed in this paper. At the microscale, a reference aligned fiber composite is considered for the analysis of the damage mechanisms such as matrix cracking and fiber–matrix debonding using the modified Mori–Tanaka model. The associated damage variables are defined, and the stiffness reduction law dependent on these variables is established. The stiffness of a random fiber composite containing random matrix microcracks and imperfect interfaces is then obtained from that of the reference composite, which is averaged over all possible orientations and weighted by an orientation distribution function. The macroscopic response is determined using a continuum damage mechanics approach and finite element analysis. Final failure resulting from saturation of matrix microcracks, fiber pull-out and breakage is modeled by a vanishing element technique. The model is validated using the experimental results found in literature as well as the results obtained for a random chopped fiber glass–vinyl ester system. Acoustic emission techniques were used to quantify the amount and type of damage during quasi-static testing.

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Advanced short fiber composites with hybrid reinforcement and selective fiber-matrix-adhesion based on polypropylene – Characterization of mechanical properties and fiber orientation using high-resolution X-ray tomography

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2018.05.014 ◽

2018 ◽

Vol 111 ◽

pp. 54-61 ◽

Cited By ~ 13

Author(s):

C. Kahl ◽

M. Feldmann ◽

P. Sälzer ◽

H.-P. Heim

Keyword(s):

Mechanical Properties ◽

High Resolution ◽

Fiber Orientation ◽

Fiber Composites ◽

Short Fiber ◽

X Ray ◽

Matrix Adhesion ◽

Fiber Matrix ◽

Hybrid Reinforcement

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Preparation and Characterization of PLA /Rice Straw Fiber Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.1154 ◽

2011 ◽

Vol 71-78 ◽

pp. 1154-1157 ◽

Cited By ~ 2

Author(s):

Zhi Fei Liao ◽

Guo Lin Song ◽

Feng Shi ◽

Zhan Song Yin ◽

You Yang ◽

...

Keyword(s):

Mechanical Property ◽

Tensile Strength ◽

Rice Straw ◽

Mechanical Performance ◽

Fiber Composite ◽

Fiber Composites ◽

Interface Effect ◽

Coupling Agents ◽

Internal Mixer

The PLA/Rice straw fiber composites with various content ratios were prepared by using an internal mixer and a flatten press. The thermal properties, interface effect and mechanical performance of as-prepared PLA/Rice straw fiber composites were studied by mechanical performance measurement, TG, DSC and SEM technique. It was found that increasing the content of rice straw fiber leads to the decrease of the melting temperature while the improvement of the crystallinity of these composites. Introducing the rice straw fibers into PLA matrix does not result in any enhancement of mechanical property. However, the tensile strength of the composite increases as the content of rice straw fiber increases from 10% to 30%. The interface effect between fibers and PLA was obviously observed by SEM photo. It was thought such an issue could be improved by the addition of appropriate coupling agents into the composites.

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Manufacture and Characterization of Pineapple Leaf Fiber Composite Board With Polypropylene Adhesive

Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA) ◽

10.54076/jumpa.v1i1.37 ◽

2021 ◽

Vol 1 (1) ◽

pp. 15-19

Author(s):

Fatimah Marwa Nasution

Keyword(s):

Fiber Composite ◽

Physical And Mechanical Properties ◽

Fiber Composites ◽

Hot Press ◽

Hot Plate ◽

Pineapple Leaf Fiber ◽

Density Values ◽

Polypropylene Matrix ◽

Leaf Fiber

Research has been conducted on the manufacture and characterization of pineapple leaf fiber composites – polypropylene matrix. Samples with comparison of pineapple leaf fiber composition: polypropylene matrix by 0 %: 100%, 5%: 95%, 10%:90%, 15%:85%, 20%;80%, and 25%:75%. The manufacture of SDN-PP composites, i.e. fiber soaked with NaOH 5% for 2 hours and then rinsed with clean water and dried, then weighed. Polypropylene and MAPP are effluxed with xylen solvent using a reflux device over a hot plate with a temperature of 17oC until melted. The polypropylene that has been diflux weighed in mass and pineapple leaf fibers are placed into a mold then pressed with a hot press at a temperature of 150oC for 30 minutes. The purpose of the study was to find out the physical and mechanical properties of pineapple leaf-matrix polypropylene fibers. Density values 0.75 g/cm3 to 0.9 g/cm3, water absorption values 0.54% to 14.38%, strong compressive values 25.09 MPa to 49.58 MPa, and strong values impact 9.74 J/mm2 to 34.18 J/mm2. Pineapple leaf fiber composite – the resulting polypropylene matrix can be categorized as a high-crust fiberboard (HF) and applied as a decorative board in accordance with the fiberboard standards set out in SNI 01-4449-2006.

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Effective Medium of Unidirectional Short-Fiber Composites by a Self-Consistent Method

Journal of Engineering Materials and Technology ◽

10.1115/1.3225935 ◽

1987 ◽

Vol 109 (1) ◽

pp. 64-66

Author(s):

Seiichi Nomura

Keyword(s):

Fiber Composite ◽

Homogeneous Medium ◽

Fiber Composites ◽

Short Fiber ◽

Effective Medium ◽

Matrix Phase ◽

Effective Stiffness ◽

Self Consistent ◽

The Matrix ◽

Consistent Method

A new self-consistent method is proposed to calculate the effective stiffness of unidirectional short-fiber composites where each transversely-isotropic short-fibers is embedded in an infinite homogeneous matrix phase. The equilibrium equation for the elastic field in short-fiber composite materials is converted into an integro-differential equation using the Green’s function for a homogeneous medium. The “effective medium” is chosen in such a way that the ensemble averaged strain field for the composite is equal to that of the homogeneous medium that exhibits the same overall response as the composite. The “effective stiffness” and the “effective mass density” are defined as those properties of the effective medium. The obtained expression for the effective stiffness is new and is not symmetrical with the matrix phase and the fiber phase, thus, reflecting the matrix role more properly than previous works which gave symmetrical results. The result is also favorably compared with experimental data.

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