Vibration Test of Composite Materials on the Basis of Measurement of Dynamic Properties

1426 WordsFeb 23, 20186 Pages
Vibration test of composite materials on the basis of measurement of dynamic properti INTRODUCTION On the basis of measurement of viscoelastic and dynamic properties, there are four important parameter such as damping, relaxation, creep, and strain rate, which describes evidence of viscoelastic behavior and can be calculated with the help of an experiment, but this paper describes the method of test for the measurement of damping. In addition, the notation of complex modulus describes conventionally for damping and dynamic stiffness of linear viscoelastic materials, where the methods of vibration test are considered for measurement of complex moduli of composites. With the help of this test of plates and beams to find dynamic elastic moduli also get evaluated. In vibration test, notation for complex modulus is suitable for portrayal of dynamic behavior of linear viscoelastic composites. The damping and stiffness which are the constituent part of the complex modulus are belongs to the dynamic mechanical properties, which may be measured with the help of experiments with vibration and wave propagation experiments ,and the measurement of the same is considered for dynamic mechanical analysis. However, there are many traps with respect to the different kind of techniques which must get avoided. In example, there was a development of commercial dynamic mechanical analyzers for the testing of small specimen of unreinforced low modulus polymers, and stiffness is generally

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