Ultrasound and Elastic Waves: Frequently Asked Questions

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Academic Press, Nov 13, 2003 - Science - 350 pages
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Ultrasound has found an increasing number of applications in recent years due to greatly increased computing power. Ultrasound devices are often preferred over other devices because of their lower cost, portability, and non-invasive nature. Patients using ultrasound can avoid the dangers of radiological imaging devices such as x-rays, CT scans, and radioactive media injections. Ultrasound is also a preferred and practical method of detecting material fatique and defects in metals, composites, semiconductors, wood, etc.

Detailed appendices contain useful formulas and their derivations, technical details of relevant theories
The FAQ format is used where a concept in one answer leads to a new Q&A
 

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Contents

B THREEDIMENSIONAL SYSTEMS
155
C WAVE EXCITATIONS
156
SOLUTIONS TO THE WAVE EQUATIONS
160
B SEPARATION OF VARIABLES
164
D PLANE WAVE SOLUTIONS
166
DISPERSION GROUP VELOCITY
170
A WAVE PROPAGATION IN VISCOELASTIC MEDIA
171
B WAVE PROPAGATION IN A THICK ROD
172

WAVE PROPAGATION CONCEPTS
26
WHAT IS A UT BEAM?
36
HOW DOES A PROPAGATING WAVE CHANGE?
41
WAVE INTERACTIONS
46
HOW DOES A WAVE INTERACT WITH A NONUNIFORM OBJECT?
62
HARDWARE EQUIPMENT CONCEPTS
66
SOFTWARE DATA PROCESSING
86
A WHAT ARE THE TYPES OF TIMEDOMAIN ANALYSES?
87
B WHAT ARE THE TYPES OF SPECTRAL ANALYSIS?
102
C WHAT STATISTICAL MEASUREMENTS ARE TAKEN?
109
D WHAT IS IMAGING?
118
STRESS STRAIN AND ELASTICITY ALSO VECTORS AND TENSORS
122
B STRESS
123
C STRAIN
129
D ALTERNATIVE INDICIAL NOTATION
131
THE GENERALIZED HOOKES LAW
132
B STIFFNESS IN ROTATED AXES
133
C SPECIAL CLASSES OF ELASTIC MATERIALS
134
STATES OF STRESS OR STRAIN IN WAVES
140
B UNIAXIAL STRESSSTRAIN RELATIONSHIPS
144
BALANCE OF FORCES AND NEWTONS LAW OF INERTIA
148
A ONEDIMENSIONAL SYSTEM
149
THEORY OF WAVE PROPAGATION
152
C BENDING WAVES
173
TRANSDUCER BEAM FORMING
176
B ANALYSIS OF RADIAL VARIATION OVER BEAM
177
C ANALYSIS OF AXIAL VARIATION OF BEAM STRENGTH
181
SOLUTIONS FOR ANISOTROPY
184
A WAVESPEED
185
B MATERIAL PARTICLE MOTION AND THE PRINCIPAL DIRECTIONS VECTORS
187
C SPECIAL CASES
188
D GROUP VELOCITY
192
OBLIQUE INTERACTIONS BETWEEN WAVES AND BOUNDARIES
196
B OBLIQUE FREE SURFACE REFLECTION OF A TRANSVERSE WAVE
199
C REFRACTION OBLIQUE TRANSMISSION OF A LONGITUDINAL OR TRANSVERSE WAVE
201
D RAYLEIGH WAVES
202
LATERAL STRESS AND STRAIN IN RODS UNDER AXIAL LOADS
206
B THE MINDLINHERRMANN APPROXIMATION
207
BENDING WAVES IN BEAMS AND PLATES
212
B THIN PLATES
218
TIMEDOMAIN ANALYSIS
222
B TIMEDOMAIN SIGNAL CONDITIONING
224
REFERENCES
230
INDEX
232
Copyright

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About the author (2003)

Dr. Lempriere is a retired aerospace engineer with expertise in the mechanical properties and behavior of materials. He worked for 33 years in the aerospace industry at both Boeing and Lockheed.

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