This website uses cookies to ensure you have the best experience. Learn more

Micromechanical Modelling Of Fiber Reinforced Metal Matrix Composites Subjected To Tensile Loading

2283 words - 10 pages

Many innovations in aerospace and transportation industries depend on high-performance structural materials. Metal-matrix composites (MMCs) have received considerable attention due to their superior physical, mechanical and thermomechanical properties as compared to those of most conventional materials. MMCs offer a high specific strength, stiffness and wear resistance, that is much higher than that of monolithic materials. They are also capable to survive higher temperature environments. High performance metal matrix composites such as 6061 Al/SiC are now used in, or being considered for use in, variety of applications within the aerospace and automotive industries [1]. ...view middle of the document...

The bonding between the matrix and fiber controls the load transfer efficiency between the fibers and matrix thus, it plays an important role in the behavior of the MMCs [2]. Assuming the bonding to be perfect, it was postulated that the mechanical properties of composite depends more on the properties of fiber as compared to the properties of matrix. The interface region, or interphase, in addition to enabling this load transfer from matrix to fiber, helps in accommodating the strain mismatch between the fiber and matrix and act as a crack blunting layer to minimize crack propagation. In metal matrix composites (MMCs), which have strong fibers and a ductile matrix, strong interfacial bonding is generally desired although, in some cases such as in fatigue crack growth, frictional sliding and fiber pullout are important. The most important of all the composite properties are usually the mechanical properties, since whatever the reason for the choice of a particular composite for some application it must have certain characteristics of shape, rigidity and strength [3]. The mechanical properties of long fibre composites, such as stiffness, can be predicted using several prediction schemes such as the “Rule of Mixtures” and the Halpin-Tsai equations [2]. Several theoretical models have been proposed for the prediction of composite properties from those of the constituent fiber and matrix. Chon and Sun [4] studied the stress transfer between a single fibre and the surrounding matrix by shear-lag theory. In a single fibre model, the properties of fibre/matrix interfaces and the friction on the interfaces after the debonding of fibre and matrix were analyzed using shear-lag theory by Zhou [5].
The aim of this paper is to develop micromechanical model, using commercial finite element package for predicting interfacial stress distribution under tensile loading at different volume fraction of SiC fiber ranging from 10% to 50% in 6061 Aluminum alloy Metal Matrix Composites (AlMMCs).
2. Numerical Methods
The effective properties of composites can be approximately obtained by numerically solving the governing equations over representative volume element (RVE) associated with appropriate boundary conditions [6]. Numerous numerical methods have been employed for solving the microfields, such as early finite difference methods, boundary element methods, and finite element methods (FEM) [7]. The finite element method is a commonly used numerical scheme for determining both global response and the local fields.
3. Modelling of the Composite
Prediction of the mechanical properties of a unidirectional fiber-reinforced composite has been an active research area for the past two decades. Finite element modeling techniques offer a powerful means of performing complex structural analysis. Three-dimensional finite element unit cell models (UCM) have been extensively used in modeling for continuous fiber reinforced metal matrix composites. UCM offer an...

Find Another Essay On Micromechanical Modelling of Fiber Reinforced Metal Matrix Composites Subjected to Tensile Loading

A soldier's story of being subjected to the harsh and threatening world

845 words - 3 pages When I went to London for a military assignment I was told that I was not allowed to wear my military uniforms and that I would have to wear civilian clothing because I was in the US military and that was looked down upon in London because of the war. My assignment was at the London MCA, Heathrow Airport, working with all military mail going into and out of Iraq, Korea, and other countries. I was checking for anthrax and bombs that might be

IB Physics Thermodynamics Lab- "The purpose of this lab is to determine the identity of an unknown metal, and to prove whether the laws of thermodynamics hold when determining this identity."

1090 words - 4 pages Thermodynamics LabPurpose:The purpose of this lab is to determine the identity of an unknown metal, and to prove whether the laws of thermodynamics hold when determining this identity. Using the accepted specific heat of water (4186 J/kg · oC), heat flow between two different sets of water though the conduction of an unknown metal can provide useful data in determining the identity. The heat transfers can be calculated to approximate the

Widget Production Paper provide , a cost-benefit matrix that compares the alternative, the effects the alternative will have on productivity, possible benefits of using a network strategy to...

1256 words - 5 pages Untitled Widget Production Paper Widget Production Paper Employees at Taylor Inc. spend 27% of their total labor time in walking by assembly lines to acquire parts needed in the production of their tasks. They are also required to lift containers that weigh an average of 42 pounds. A total of 17 employees are required on the assembly lines. Employees average hourly cost is $43.00 per


1239 words - 5 pages In aerospace industry, fiber reinforced plastic (FRP) composite material can be tailored to produce very strong and stiff lightweight structures. Nevertheless, its superiority is often restricted by the inevitable presence of fiber-matrix interface. The surface interaction that takes place between fiber and matrix plays very important role in determining the properties of composite material [1]. The quality of an interface can be modified though

Numerical Study of Tensile Properties of POM/ Woven Kenaf Composite

1426 words - 6 pages Numerical Study of Tensile Properties of POM/ Woven Kenaf Composite. CHAPTER 1: INTRODUCTION 1.1 Background Study The geometry of woven fiber reinforced polymer like Polyoxymethylene (POM) and Woven Kenaf composite is quite complex. Therefore, to predict tensile properties of such composite requires numerical method. This project focuses on the use of The Laminator software and understanding the theories on Maximum Stress, Maximum

Fiber Reinforced Concrete and Its Application

928 words - 4 pages AIM: The aim of this topic is to define fiber reinforced concrete and its application, it important properties as well as it superior resistance to cracking. As a result of the ability of fiber to arrest cracks, the composites of fiber possesses an increased in tensile strength both at the first crack and at ultimate, especially under flexural loading, and the fibers can still hold the matrix together even after a lot of cracking.  Introduction


935 words - 4 pages of the reinforcement phase to matrix material and for fibrous composites for example is strongest in the direction of the fibers. Perpendicular, or transverse, to the fibers, the matrix properties dominate because load must be transferred by the matrix to every fiber diameter. Due to a weight distribution through the material, even though one direction may dominate, it is necessary to stack layers of fibres in multiple directions, creating a

Carbon Fibres

1703 words - 7 pages pre-impregnated (pre-preg) with the polymer. Carbon-carbon composites consist of highly-ordered graphite fibers embedded in a carbon matrix. C-C composites are made by gradually building up a carbon matrix on a fiber preform through a series of impregnation and pyrolysis steps or chemical vapor deposition. C-C composites tend to be stiffer, stronger and lighter than steel or other metals.PRODUCTION PROCESSES - Carbon FibresThe production of carbon

Replacement of Damaged Human Bone

632 words - 3 pages large hydroxyapatite microparticles debond easily from the polymer Matrix, resulting in inefficient stress-transfer mechanism across the matrix-filler interface during the tensile tests [7]. Moreover, large HAP microparticles act as stress concentrators for the polymer composites, and fracture readily during mechanical loading [8].It has been shown that only a few percent of nanofillers (usually from 1 to 5 wt.%) leads to greatly improved thermal

Technology of Composite Bicycle Frames

1838 words - 7 pages highest possible strength to weight ratio ...” (Moynihan ). For this paper “composite” will mean a plastic resin reinforced with structural fibers. In this paper I will be comparing composites against other methods of building bike frames. First we will discuss the structural advantages of building a bicycle with composites. Using composites you are not limited to certain shapes as if you were using metal tubing. Most metal bike frames are

Commonly Used Composites and Their Characteristics

789 words - 4 pages implementing in cross-material classes as well. Ceramics powder can be added to plastics to make hard and fireproof polymers. Ceramic powder when mixed with metals, gives cermets, which are used in tips of metal cutting tools. Another branch of the same idea is the blending of metal filaments, ceramic and polymer into one large bulk to form metal-matrix composites (MMCs), reinforced plastics (RP) and ceramic-matrix composites (CMCs). Such a radical

Similar Essays

I'm A Reel Boy Essay About The History And Evolution Of Special And Visual Effects In The Motion Picture Industry. Covers Techniques From Pyrotechnics To Digital Composites

1216 words - 5 pages physically impossible to achieve in actuality with out the aide of miniatures and chroma keying. Movies from Who Framed Roger Rabbit to The Matrix trilogy heavily rely on this process.Pyrotechnics also play an important role in entertainment today. Large explosions and the like are now used attract moviegoers to watch a film. Audiences want bigger and better chase scenes and always, always more action. Pyrotechnics from Back Draft, the James Bond: 007

Using Calorimetry To Determine The Specific Heat Of A Metal Jupiter High School Chemistry Lab Report

849 words - 4 pages I. Using Calorimetry to Determine the Specific Heat of a Metal. II. Purpose The purpose of this lab is to find the specific heat of an unknown metal by calculating the amount of energy absorbed or specific heat. That combined with prior knowledge of the principles of calorimetry. Then a comparison can be drawn to the figures of known substances on the chart provided resulting in the identity of the metal being revealed. III. Materials and

The Reactivity Of Metals. This Report Give An Experiment Showing How To Find The Most To Least Reactive Metal

1793 words - 7 pages By Sahil Dixit 11.06 Chemistry ExperimentAim:To compare the reactivity of metals in oxygen, water and a diluted acid, and rate the metals from most reactive to least reactive.Apparatus:6 X magnesium strips6 X calcium strips6 X copper strips6 X iron strips6 X zinc strips300 mL of waterBunsen BurnerTongs (metal and wooden)6 X Medium sized test tubesFunnel20 Ml of Dilute Hydrochloric acid (1 M)Measuring CylinderGogglesThermometerLab

Comparison Of Star Wars & The Matrix In Relation To The Hero's Quest

1694 words - 7 pages "Nobody can be told exactly what the Matrix is; you have to see it for yourself."-Morpheus"You must learn the ways of the Force, if you are to come with me to Alderaan."-Obi-Wan KenobiOne character is played by one of Hollywood's strongest black actors; the other, by one of the elder statesmen of film. But Morpheus and Obi-Wan Kenobi have a lot in common.Those similarities take place in the larger context of two hit films, both of which have