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wave dispersion

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Image
Published: 01 January 2001
Fig. 25 Leaky Lamb wave dispersion curves for a unidirectional graphite/epoxy composite. (a) Curve showing wave propagation along the fibers generated by an imaging method. (b) Curve showing wave propagation at 90° to the fibers More
Image
Published: 01 August 2018
Fig. 25 Leaky Lamb wave dispersion curves for a unidirectional graphite/epoxy composite. (a) Curve showing wave propagation along the fibers generated by an imaging method. (b) Curve showing wave propagation at 45° to the fibers More
Image
Published: 01 August 2018
Fig. 2 Group velocity dispersion curves for guided waves in a 150 mm (6 in.) schedule 40 steel pipe (168 mm, or 6.6 in., outer diameter; 7 mm, or 0.28 in., wall thickness) More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003298
EISBN: 978-1-62708-176-4
... moderate strain level under constant, high-strain-rate loading. Some polymers exhibit no permanent plastic flow after substantial high rate straining, the strain recovery effect being time dependent. Stress-wave propagation through some polymers, such as polythene, is so dispersive that over...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003296
EISBN: 978-1-62708-176-4
... when using a tensile Hopkinson bar in terms of loading technique, sample design, and stress-state stability, are discussed. high-strain-rate stress-strain response sample design stress-state stability split-Hopkinson pressure bar testing data reduction wave dispersion sample preparation...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006461
EISBN: 978-1-62708-190-0
... ( Ref 6 ). Because the energy of Rayleigh waves is concentrated near the surface, these waves can propagate along large curvatures. Their velocity, however, is then defined by a frequency-radii criterion that describes dispersion, that is, a frequency-dependent velocity ( Ref 2 ). Dispersion is also...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006475
EISBN: 978-1-62708-190-0
... for microwaves. It discusses the advantages and limitations of inspection with microwaves. The article discusses the physical principles, including reflection and refraction, absorption and dispersion, scattering, and standing waves. It provides a discussion on terahertz (THz) imaging for nondestructive...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006441
EISBN: 978-1-62708-190-0
... vary for different shapes and sizes of waveguide, and they have speeds that vary with frequency, sometimes dramatically. Figure 2 shows the speeds of guided waves that can propagate in a typical 150 mm (6 in.) diameter pipe. Fig. 2 Group velocity dispersion curves for guided waves in a 150 mm...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006458
EISBN: 978-1-62708-190-0
... pulse that normally consists of slightly more cycles than there are periods in the MC. One main reason for defining this MC wavelength becomes apparent when dispersion curves and coupling to guided waves is subsequently introduced. Fig. 3 (a) Schematic diagram of a permanent magnet...
Image
Published: 15 December 2019
Fig. 36 Borrmann fan bounded by the incident ( AB ) and diffracted ( AC ) beams showing the distribution of energy for an incident spherical wave that excites all tie points along the dispersion surface More
Image
Published: 01 January 2001
Fig. 24 Leaky Lamb wave characterization. (a) The reflection at 39.5° incidence angle and the dispersion curve for a graphite/epoxy [0] 24 laminate with no defects. (b) The response at a defect area where simulated porosity was introduced in the middle layer using microballoons More
Image
Published: 01 August 2018
Fig. 24 Leaky Lamb wave characterization. (a) The reflection at 39.5° incidence angle and the dispersion curve for a graphite/epoxy [0] 24 laminate with no defects. (b) Response at a defect area where simulated porosity was introduced in the middle layer using microballoons More
Image
Published: 15 December 2019
Fig. 34 Dispersion surface construction showing the tie points excited by an incident wave in (a) the Laue geometry, where one tie point in each branch (“A” on branch 1 and “B” on branch 2) is excited, and (b) the Bragg geometry, where two tie points (“A” and “B”) on the same branch More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003299
EISBN: 978-1-62708-176-4
... of the bar is comparable to the wavelength of the dominant frequency component (or when the period of the pulse is comparable to the transit time of the bar wave across the diameter of the bar), dispersion effects become extremely severe, and the use of surface measurements at distances farther away from...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003300
EISBN: 978-1-62708-176-4
.... In torsional testing, friction does not exist. Wave Dispersion in the Bars In the compression Kolsky bar, the elastic waves that travel in the bars undergo geometric dispersion because different frequency components in the compressive pulse have different velocities. In particular, the higher frequency...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006644
EISBN: 978-1-62708-213-6
... Dynamical Image From the dynamical theory of x-ray diffraction, the wavefield propagating in the crystal is represented by a tie point on the dispersion surface and comprises two waves corresponding to the incident and diffracted x-ray beams (see “Appendix A: Kinematical and Dynamical Theories of X...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003235
EISBN: 978-1-62708-199-3
... Abstract Microwaves (or radar waves) are a form of electromagnetic radiation with wavelengths between 1000 cm and 1 mm in free space. One of the first important uses of microwaves in nondestructive evaluation was for components such as waveguides, attenuators, cavities, antennas, and antenna...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0005697
EISBN: 978-1-62708-181-8
... diameter DIC differential interference contrast dm decimeter DPH diamond pyramid hardness (Vickers hardness) DT dynamic tear (test) DWTT drop-weight tear test e natural log base, 2.71828; electron E energy; modulus of elasticity; embrittlement index; electrochemical potential EDS energy-dispersive...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.9781627081818
EISBN: 978-1-62708-181-8
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009081
EISBN: 978-1-62708-177-1
... polarized light, full wave plate, 40× objective. (b) Hackles in the interlayer region of the composite. Transmitted polarized light, full wave plate, 40× objective. (c) Fracture in the interlayer region. Transmitted polarized light, full wave plate, 40× objective Dispersed-Phase, Rubber-Toughened...