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| how particles vibrate w/ longitudinal waves |
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Definition
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| how particles vibrate w/ shear waves |
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Definition
| right angles to motion of wave |
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| how deep do rayleigh waves penetrate |
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acoustic energy propagates in different modes
such as
longitudinal/ compression
shear/ transverse
rayleigh/ surface
lamb/plate |
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longitudinal/compression
shear/ transverse
rayleigh/ surface
lamb/plate
are all examples of |
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| wave w/ multiple or varying wave velocities |
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| how compression/longitudinal waves work |
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Definition
wave pusses 1 column of attoms
wich push next column and so on
after each column moves it rebounds back
in other direction
particle movement is parallel to wave |
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| only wave mode that can go through solids, liquids and gasses |
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Definition
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| longitudinal waves can go through |
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Definition
| solids, liquids, and gasses |
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| kinds of waves that only go through solids |
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Definition
| shear, surface, and plate |
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| shear surface and plate waves go through what materials |
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Definition
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| rate at which sound waves pass through various substances |
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Definition
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Definition
| rate at which sound waves pass through various substances |
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| rayleigh waves are influenced most by defects located |
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Definition
| one wavelength below surface |
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| factors that influence velocity of lamb/plate waves |
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Definition
frequency of wave,
angle of incidence
type of material |
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| velocity is solely dependant on type of material and wave in |
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Definition
| longitudinal/compression, shear/transverse, and raleigh/surface waves |
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| what is unique about lamb waves |
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Definition
velocity is influenced by more then just the type of material
like
frequency of wave,
angle of incidence
and type of material |
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| types of lamb/plate waves |
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Definition
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| how many modes can a lamb wave attain |
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Definition
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| kind of wave that can travel around a curve |
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Definition
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| reflection of surface wave happens at |
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Definition
| sharp corners and discontinuties |
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Definition
| reduction in power of high frequency ultrasonic waves |
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| reduction in power of high frequency ultrasonic waves |
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Definition
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| higher frequency = shorter or longer wave length |
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| which wavelength is shorter for same frequency shear or longitudinal |
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| A-scan representation pic |
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| longitudinal and shear wave modes compared pic |
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