composite material
TRANSCRIPT
EPOXYBASED
COMPOSITEMATERIALS
Project Coordinator:
Mr. Sunil Chamoli
BY-:Meenu
Bhandari
COMPOSITE MATERIALS..??
Composite materials are materials made from two or more constituent materials with significantly different properties, that when combined, produce a material with characteristics different from the individual components.
Composite materials consist of two or more chemically distinct constituent on a macro scale having a dispersed interface separating them and having bulk performance which is considerably different from those of any of its individual constituents.
Examples: Cement, Concrete, Fiber-reinforced polymer, etc.
CLASSIFICATION
Composites can be classified according to different criteria:
Metal matrix compositeseg: Carbon fibers in Aluminium matrix
Ceramic matrix composites
eg: Conventional SiC or the less expensive SiSiC
Polymer matrix composites
eg: Thermoset, Thermoplastic, Rubber
OBJECTIVE OF WORK
1. Fabrication of epoxy based composites reinforced with short glass fibers and natural fibers.
2. Study the mechanical behavior of the composites.
3. Study the effect of alkali treatment on behavior of the composites.
4. Study the surface morphology of the composites using Scanning Electron Microscopy (SEM).
RAW MATERIALS
Natural fibers (bamboo fiber, coir) Glass fiber Epoxy resin Hardener NaOH alkali
MATRIX MATERIAL Different types like metals, ceramics and
polymers. Polymer matrices are most commonly used
matrix materials due to its advantages like cost efficiency, light weight, high strength to weight ratio and environmental friendly.
Most commonly used thermoset resins are epoxy, vinyl ester, polyester resin, etc.
Epoxy resin will be used for the fabrication of composites in the project.
FIBER MATERIAL
Fiber is a reinforcing phase of composite materials.
Fibers which will be used in the project:1. Natural fibers (bamboo fiber, coir)2. Glass fiber
FIBERS REQUIRED
COIR BAMBOO
GLASS
METHODOLOGY
Treatment of Fiber using alkali (NaOH)
Fabrication of Composite Materials
Bamboo Composite Glass-fiber Composite
MECHANICAL TESTING
Tensile test Flexural (bending) test Impact test Scanning Electron Microscopy (SEM)
TENSILE TEST The tensile strength is determined by
the tensile test which is generally performed on flat specimens using Universal Testing Machine (UTM).
During the test a uni-axial load is applied through both the ends of the specimen.
The test will be repeated three times on each composite type and the mean value will be considered.
STANDARD TENSILETEST SPECIMEN
FLEXURAL TEST This test measures the force required
to bend a beam under 3-point loading conditions. The data is often used to select materials for parts that will support loads without flexing.
The test provides values for the modulus of elasticity in bending, flexural stress and the flexural strain of the material.
FLEXURAL TEST WITHTHREE POINT LOADING
IMPACT TEST The Charpy impact test, also known as
the Charpy V-notch test, is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fracture.
This absorbed energy is a measure of the material's notch toughness.
IMPACT TEST
IMPACT TESTINGMACHINE
IMPACT TESTSPECIMEN
SCANNING ELECTRON MICROSCOPY {SEM}
The morphological characterization of the composite surface is done in scanning electron microscope.
A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons.
SCANNING ELECTRON MICROSCOPY
SCANNING ELECTRONMICROSCOPE
A generalresult of SEM
ESTIMATED COST AND TIME The materials required for the
fabrication of composites are not costly and can be obtained easily from the market at a minimal cost.
Price of Epoxy Resin = Rs. 160-180 per kg, our requirement is approx. 3 kg.
Price of NaOH alkali = Rs. 40-45 per kg.
THANK YOU