Composite material

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