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el. paštaskodas
C O N T E N T S
S Y M B O L S
PREFACE
1 INTRODUCTION
2 LONGITUDINAL SURFACE ACOUSTIC WAVES (LSAW)
2.1 LSAW and TSAW theory
2.2 LSAW exciting and receiving methods
2.2.1 LSAW exciting by X-cut quartz crystal
2.2.2 Y-cut quartz crystal method
2.2.3 Periodical mechanical linear structure method
2.2.4 Angular method
2.2.5 Electromagnetic acoustic method
2.2.6 Thermo-acoustic method
3 LSAW APPEARANCE AND USE
3.1 LSAW usage in nondestructive testing
3.2 LSAW application for measurement of physicaland mechanical constants
3.2.1 Sound Velocity Measurements
3.2.2 Measurement methods of elasticity constants
3.2.3 Measurement of surface hardness characteristics with LSAW
3.3 LSAW in seismology
3.3.1 Seismic waves and their velocity
3.3.2 Simulation seismic phenomena
4 LSAW RESEARCH METHODS
4.1 Angular-pulse method
4.1.1 Equipment for immersion research
4.1.2 Calibration of angular measurement device
4.2 Pulse-time method
4.2.1 Experimental equipment for the prism research method
4.2.1.1 Influence of ultrasonic attenuation in prism
4.2.1.2 Research of angular transducer acoustic contact
4.2.1.3 Research of transducers with variable angle
4.2.1.4 Constructions of double angular transducers
4.2.1.5 Influence of diffraction to the efficiency of LSAW exciting
4.3 Experimental SAW research
4.3.1 LSAW and TSAW comparative research
4.3.1.1 LSAW and TSAW propagation on the rough surface
4.3.1.2 SAW interaction with the corner
4.3.2 Research of SAW propagation on the cylindrical surface
4.3.2.1 SAW propagation on the convex surface
4.3.2.2 SAW propagation on the concave surface
4.3.3 Investigations of LSAW excitation by piezoelectric grating
4.3.4 Investigations of LSAW and TSAW excitation bypulse laser
4.3.5 Lamb waves exciting by LSAW and TSAW transducers
4.3.6 Investigation of mechanical tension in sheet products by symmetrical Lamb waves
REFERENCES
APPENDIXES
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
S U M M A R Y
S A N T R U M P A
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