Analysis Of Material Stiffness Effect Against Nonlinear Acoustic Wave Modulation Intensity-Simulation

Noor Azwani, Mat Zin (2011) Analysis Of Material Stiffness Effect Against Nonlinear Acoustic Wave Modulation Intensity-Simulation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Non linear acoustics is one of the analytical methods used for the purpose of reviewing whether a specimen has a disability or not. Apart from studying the specimen, it also aims to analyze the defects that occur in the specimen. These methods include the use or transfer of a function called "transfer function". Transfer function is used to generate a graph and the graph, we can make comparisons when there is a defect in material or not. This relationship involves the material elasticity and nonlinear acoustic effects. Elasticity of materials depends on the properties of young modulus of plate such as aluminum which has elasticity 72400 MPa. Aluminum is easily established, cheap and readily available. In addition, aluminum is a medium elasticity causes aluminum are choose as a specimens selected experiments. However, in this investigation, we used ABAQUS software is a software technology without involving the destruction of the plate and analysis Finite Element Method (FEM). These methods include the investigation of the properties of materials (Aluminum). As such we can see the properties of aluminum that has a density of 2780 kg / m³ and the Poisson ratio of 0.33. From these characteristics, we can see the changes that occur in the specimens, especially in the frequency. This is because the main focus is the frequency. Plates that do not have a disability will produce the same output frequency to input frequency. This will happen because of reflection back to the plate when no valid target out. Therefore, this method is very good because it can be reviewed in detail in the event of a defect in the plate. However, this method requires high expertise because it requires analysts with knowledge to make the analysis of published data output. Of the results obtained showed that contrary to graph theory. Graph obtained is a not straight lined

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