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TEXTILE COMPOSITES
Waqas Younus Paracha
Senior Research Assistant
Textile Research and Innovation Centre (TRIC)Textile Institute of Pakistan
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TYPES OF ENGINEERING MATERIALS.
• The basic types of engineering materials are:
• METALS.
•
POLYMERS (Plastics).• CERAMICS.
• COMPOSITES.
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What is a composite?
• The term "composite" can be used in several
different ways, and the definition can range
from general to very specific.
• A broad definition of a composite is: "Two or
more dissimilar materials which when
combined are stronger than the individual
materials."
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What is a composite?
• While the broad definition of composites is
accurate, it is too general.
• Composite materials (or composites for short)
are engineered materials made from two or
more constituent materials with significantly
different mechanical properties and which
remain separate and distinct within thefinished structure.
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CLASSIFICATION OF COMPOSITE
MATERIALS:
Compositematerials
Fibre reinforcedcomposites
Carbon carboncomposites
Metal matrixcomposites
Ceramiccomposites
Organiccomposites
Engineeredwood
Plasticimpregnated or
laminated paper
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Brief History of Composites
The use of natural composite materials has been
a part of man's technology since the first
ancient builder used straw to reinforce mud
bricks.
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HISTORY OF COMPOSITES
• Israelites' use of chopped straw in their brick
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HISTORY OF COMPOSITES
• the Egyptian sarcophagi fashioned from glued
and laminated wood veneer and also their use
of cloth tape soaked in resin for mummy
embalming
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The Etruscan "Sarcophagus of the Spouses", at the
National Etruscan Museum
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HISTORY OF COMPOSITES
• the Mongol warriors' high-performance,
recurved archery bows of bullock tendon,
horn, bamboo strips, silk and pine resin, which
are 80% as strong as our modern fiberglass
bows
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A modern reconstruction, in fibreglass and wood, of a
historical composite bow
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HISTORY OF COMPOSITES
• Chinese bamboo rockets reinforced with rope
wrappings
• Japanese Samurai swords formed by the
repeated folding of a steel bar back on itself
• the early fabrication of steel and of iron gun
barrels in Damascus
• Roman artisans' use of ground marble in their
lime plaster, frescoes and pozzolanic mortar.
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Time scale of composite
advancements
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COMPOSITION OF A COMPOSITE
MATERIAL:
• Composites are made up of individual
materials referred to as constituent materials
• There are two categories of constituent
materials
– matrix
– Reinforcement
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MATRIX (RESIN SYSTEMS)
• matrix holds the reinforcements in an orderlypattern
• the matrix also helps to transfer load
• Matrix materials are usually some type of plastic, and these composites are often calledreinforced plastics
•There are other types of matrices, such asmetal or ceramic, but plastics are by far themost common
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MATRIX (RESIN SYSTEMS)•
The choice of a resin system for use in anycomponent depends on a number of itscharacteristics., with the following probably beingthe most important for most compositestructures:
• 1. Adhesive Properties
• 2. Mechanical Properties
•3. Micro-Cracking resistance
• 4. Fatigue Resistance
• 5. Degradation from Water Ingress
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TYPES OF MATRIX (RESIN SYSTEMS)
• Most commonly used resin systems are:
• Polyester resins
•
Vinyl ester resins• Epoxy resins
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Some properties of resin systems:
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REINFORCEMENTS
• The role of the reinforcement in a composite
material is fundamentally one of increasing
the mechanical properties
• All of the different fibres used in composites
have different properties and so affect the
properties of the composite in different ways
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REINFORCEMENTS
• individual fibres or fibre bundles can only be
used on their own in a few processes such as
filament winding. For most other applications,
the fibres need to be arranged into some form
of sheet, known as a fabric, to make handling
possible.
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• These fabrics can be made through different
textile techniques such as braiding, weaving,
knitting and sometimes even Non wovens can
be used as reinforcements.
• Therefore the utilization of all these textile
techniques gave rise to the name TEXTILE
COMPOSITES.
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PROPERTIES OF REINFORCING FIBERS
• The four main factors that govern the fibre’scontribution are:
• 1. The basic mechanical properties of the fibreitself.
• 2. The surface interaction of fibre and resin(the ‘interface’).
• 3. The amount of fibre in the composite (‘FibreVolume Fraction’).
• 4. The orientation of the fibres in thecomposite.
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Material Type Tensile Strength
(MPa)
Tensile Modulus
(GPa)
Typical Density
(g/cc)
Specific
Modulus
Carbon HS 3500 160 - 270 1.8 90 - 150
Carbon IM 5300 270 - 325 1.8 150 - 180
Carbon HM 3500 325 - 440 1.8 180 - 240
Carbon UHM 2000 440+ 2.0 200+
Aramid LM 3600 60 1.45 40
Aramid HM 3100 120 1.45 80
Aramid UHM 3400 180 1.47 120
Glass - E glass 2400 69 2.5 27
Glass - S2 glass 3450 86 2.5 34
Glass - quartz 3700 69 2.2 31
Aluminium Alloy (7020) 400 1069 2.7 26
Titanium 950 110 4.5 24
Mild Steel
(55 Grade)450 205 7.8 26
Stainless Steel
(A5-80)800 196 7.8 25
HS Steel
(17/4 H900) 1241 197 7.8 25
TYPICAL PROPERTIES OF SOME
REINFORCEMENTS:
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WAYS TO MANUFACTURE A
COMPOSITE MATERIAL
• Engineered composite materials must beformed to shape
• The matrix material can be introduced to the
reinforcement before or after thereinforcement material is placed into the moldcavity or onto the mold surface
•
The matrix material experiences a meldingevent, after which the part shape is essentiallyset
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• Depending upon the nature of the matrixmaterial, this melding event can occur invarious ways such as chemical polymerization
or solidification from the melted state.• In general, the reinforcing and matrix
materials are combined, compacted andprocessed to undergo a melding event
• After the melding event, the part shape isessentially set
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• There are different type of moulding
processes which can be utilized to form a
composite material. These can be
• Vacuum bag moulding
• Pressure bag moulding
• Autoclave moulding
• Resin transfer moulding (RTM)
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VACUUM BAG MOULDING
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AUTO CLAVE MOULDING
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RESIN TRANSFER MOULDING
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TEXTILE COMPOSITES...THE WAY
FORWARD
• APPLICATIONS IN THE AEROSPACE INDUSTRY:
• composite materials comprise more than 20%
of the A380's airframe. Carbon-fibre
reinforced plastic, glass-fibre reinforced plastic
and quartz-fibre reinforced plastic are used
extensively in wings, fuselage sections (such
as the undercarriage and rear end of fuselage), tail surfaces, and doors.
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APPLICATIONS IN THE CONSTRUCTION
INDUSTRY
• Textile composites have been used in
construction since the 1960s, and
• though they do not hold a prominent place
compared with that of traditional
• construction materials, their use is on the
increase
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APPLICATIONS IN THE MEDICAL
INDUSTRY
• Splinting materials for the repair of broken
bones are not only the largest
• medical market for textile reinforced
composites, but the oldest
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APPLICATIONS IN THE SPORTS
INDUSTRY
• Conventional composite materials generally
consist of a reinforcing textile structure and a
surrounding matrix with other mechanical
properties
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APPLICATIONS IN THE DEFENCE
INDUSTRY
• In 2007 an all-composite military High
Mobility Multi-purpose Wheeled Vehicle
(HMMWV or Hummvee) was introduced by
TPI Composites Inc and Armor Holdings Inc,the first all-composite military vehicle. By
using composites the vehicle is lighter,
allowing higher payloads
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• Considering the given examples, one can
easily see that a virtually limitless
• number of material combinations are possible
• Hence,
THINK BIG
THINK COMPOSITES!!!!!THANK YOU