Basic Principles of Ultrasonic Testing



basic principles of ultrasonic testing Wave propagation

Longitudinal waves propagate in all kind of materials.
Transverse waves only propagate in solid bodies.
Due to the different type of oscillation, transverse wavestravel at lower speeds.
Sound velocity mainly depends on the density and E-modulus of the material.

Reflection and Transmission


As soon as a sound wave comes to a change in material ....etc

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Testing of Welds



Welded joints in a welded structure are expected to possess certain service-related capabilities. Welded joints are generally required to carry loading of various types in which the weld is subjected to stress of either a simple or complex character. More over a finished weld is not always as good or as bad as it may appear to be on its surface. It is therefore necessary to find out how satisfactory or sound the weld is. For this purpose certain weld inspection and testing procedures have been discovered and standardized ....etc

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Nonintrusive manipulation by standing-wave acoustics has been widely used for levitation and trapping of macroscopic objects.1 The standing-wave field creates an acoustic radiation force on the object that depends on its size and acoustic parameters.2 In the present article we demonstrate size-selective separation and retention of latex spheres inside a small-diameter flow-through capillary by use of an ultrasonic radiation trap. The work aims at rapid in-flow detection and separation of specific molecules via antibody-coated latex spheres. Ac ....etc

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ULTRASONIC TESTING

Principle of UST
ULTRASONIC INSPECTION is a nondestructive method in which beams of high-frequency sound waves are introduced into the material to be inspected for detection of flaws.
The sound waves travel through the material with some attendant loss of energy (attenuation) and are reflected at interfaces.
The reflected beam is displayed and then analyzed to define the presence and location of flaws or discontinuities.
FLAW CHARACTERISATION TECHNIQUE METHODS:
Most widely used flaw sizing metho ....etc

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Ultrasonic methods enjoy the great capabilities in solving various problems associated with structural engineering and engineering materials. In this seminars, a host of research works and studies in this field carried out by the speaker will be presented to demonstrate the broad spectrum of their applications in aerospace engineering. Focus will be on nondestructive evaluation (NDE) and characterization of aerospace materials such as composites. Topics to be presented in the seminar include (1) 3-D imaging of damage in composites, (2) echo det ....etc

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hi .iam shravan ..
iam doing m.tech (SE)
any one help me to do my project
title :

An Interaction-Based Test Sequence Generation Approach for Testing Web


this is IEEE 2008 paper .if any one had this paper please ..upload ppts and documentation and code ....etc

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ULTRASONIC TESTING
NATURE OF SOUND WAVES
Sound waves are elastic waves
It can be transmitted through both fluid and solid media
Elastic waves with frequency higher than audio range is termed as ULTRASONIC WAVES
Ultrasonic waves used for non destructive inspection of materials are usually within frequency range 0.5 MHz to 20MHz
In fluids sound waves are of longitudinal compression type
Particle displacement is in the direction of wave propagation
In solids they are shear waves and elastic surface waves can als ....etc

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Implementation Of Zoom FFT in Ultrasonic Blood Flow Analysis

Introduction
An adequate blood flow supply is necessary for all organs of the body. Analysis of the blood flow finds its importance in the diagnoses of diseases. There are many techniques for analyzing the blood flow. These techniques are not affordable by the poor people because of their high expense. So we have implemented a technique called Zoom-FFT. This technique is simple and affordable to detect the blood clots and other diseases.

Human with his potential tries to get wh ....etc

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about how can machinery parts and pipeline welds be tested for flaws without destroying them ....etc

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An adequate blood flow supply is necessary for all organs of the body. Analysis of the blood flow finds its importance in the diagnoses of diseases. There are many techniques for analyzing the blood flow. These techniques are not affordable by the poor people because of their high expense. So we have implemented a technique called Zoom-FFT. This technique is simple and affordable to detect the blood clots and other diseases.

Human with his potential tries to get whichever is unexplored, explored, and till now we are managing and succeeding u ....etc

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