CHARACTERISTIC OF TEST ON COMPOSITE

Due to the design of composite material it is natural fiber composite and synthetic fiber composite such various behaviour and properties of material are identified due to testing, mechanical test, thermal test, chemical test, etc. under which composite will perform.

1. Tensile Test:

The tensile properties of composite laminate are fount among the mechanical properties. The difficulty of performing an acceptable tensile test. The unidirectional composite can be tested by following procedure on tensile test.

2, Compression Test:

The compression strength is obtained by direct and loading of the specimen. If the sample is thin, lateral supports are to be provided to prevent buckling. The specimen shape is dog bone shape it is ensure the increased load bearing area at the ends which eliminates the end crushing.

3, Shear Test:

A shear test is performed on the composite laminate to know in shear modulus or shear strength. The shear test method and specimen configuration is made as procedure. As analysis of specimen under load reveals that a state of uniform shear stress exists in the centre of the notched specimen on the cross section through the notches.

4, Flexural Test:

Flexural test is bending test, the flexural specimen is simply a strip of test material of constant width and thickness and the deflection is measured using a calibrated linear variable differential transform at the mid span.

5, Impact Test:

Impact test is Charpy test, Izod test and drop weight impact test the impact test is carried out at the type of test machines.

6, Bio Degradation Test:

The properties of the composite depend on properties, and their behavior when they were composed to make the composite laminates. The volume fraction of fiber and resin in the composite, the natural fibers composite have lesser flexural strength. All the natural fibers are hydrophilic in nature. The flexural modulus and flexural properties of these composite is less than their tensile properties.

7, Water Absorption Test:

The water and moisture take up properties for natural composites is considerable. The natural fibers and the synthetic fibers should also be used to retain the strength with water absorption. The water absorption test was conducted on the room temperature. The samples were soaked in pure water. The moisture absorption helps to increased crack propagation in the matrix region. 

8, Hygrothermal test:

The action of heat and moisture has a combined effect on the composite laminate. In determine the hygrothermal effect, the tensile test is conducted on a sample and the remaining samples are stored in separate place in six months, during this time the sample are affected with moisture and heat, then the samples are conducted on tensile test. The final result are analyzed.

A Review On Natural Fiber And Its Characteristics
A Mani Kandan 1 and Prof. S Rajakumar 2
1
PG Scholar, Department of Mechanical Engineering, Anna University Regional Campus, Tirunelveli
Region, Nagercoil Road, Tirunelveli – 627 007 (TN)
makmani6297@gmail.com
2
Asst. Professor, Department of Mechanical Engineering, Anna University Regional Campus, Tirunelveli
Region, Nagercoil Road, Tirunelveli – 627 007 (TN)
rajkumar1998@yahoo.co.in