Ultrasonic Formula Velocity Shear Wave Velocity Wavelength · PDF fileLongitudinal Wave...
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Longitudinal Wave Velocity Shear Wave Velocity Wavelength Where: V L = Longitudinal Wave Velocity E = Modulus of Elasticity ρ = Density μ = Poisson’s Ratio Where: V s = Shear Wave Velocity E = Modulus of Elasticity ρ = Density μ = Poisson’s Ratio G = Shear Modulus Where: λ = Wavelength V = Velocity F = Frequency Refraction (Snellʼs Law) Acoustic Impedance Reflection Coefficient Where: θ Ι = Angle of the Incident Wave θ R = Angle of the Reflect- ed Wave V 1 = Velocity of Incident Wave V 2 = Velocity of Reflected Wave Where: Z = Acoustic Impedance ρ = Density V = Velocity Where: R = Reflection Coefficient Z 1 = Acoustic Impedance of Medium 1 Z 2 = Acoustic Impedance of Medium 2 www.nde-ed.org Ultrasonic Formula
Transcript of Ultrasonic Formula Velocity Shear Wave Velocity Wavelength · PDF fileLongitudinal Wave...
Longitudinal Wave Velocity Shear Wave Velocity Wavelength
Where:
VL
= Longitudinal Wave Velocity
E = Modulus of Elasticity
ρ = Densityμ = Poisson’s Ratio
Where:
Vs
= Shear Wave VelocityE = Modulus of Elasticityρ = Densityμ = Poisson’s RatioG = Shear Modulus
Where:
λ = WavelengthV = VelocityF = Frequency
Refraction(Snellʼs Law) Acoustic Impedance Reflection Coefficient
Where:
θΙ
= Angle of the Incident Wave
θR
= Angle of the Reflect-ed Wave
V1
= Velocity of Incident Wave
V2
= Velocity of Reflected Wave
Where:
Z = Acoustic Impedanceρ = DensityV = Velocity
Where:
R = Reflection CoefficientZ
1= Acoustic Impedance of
Medium 1Z
2= Acoustic Impedance of
Medium 2
www.nde-ed.org
Ultrasonic Formula
Near Field Beam Spread Half Angle
Decibel (dB)Gain or Loss
Where:
N = Near FieldD = Transducer Diameterλ = WavelengthV = Velocity
Where:
λ = WavelengthD = Transducer DiameterV = VelocityF = Frequency
Where:
dB = DecibelA
1= Amplitude 1
A2
= Amplitude 2
