作者: 樹木心 時間: 2025-3-21 21:13 作者: 政府 時間: 2025-3-22 02:58 作者: 交響樂 時間: 2025-3-22 06:49 作者: peak-flow 時間: 2025-3-22 10:48
Handbuch der Familiendiagnostikstic resonance, or EMAR. Tone burst input signals are normally used for this purpose, and an analog superheterodyne spectrometer is useful for detecting resonance frequencies. This chapter describes the principle and operation of EMAR measurement and shows electric circuit for the analog spectral analysis.作者: aspect 時間: 2025-3-22 15:28 作者: aspect 時間: 2025-3-22 20:14 作者: Gyrate 時間: 2025-3-22 22:03 作者: 縫紉 時間: 2025-3-23 04:29
Handbuch der Experimentellen Pharmakologieagnets) to provide a biasing magnetic field. An EMAT configuration depends on the modes of elastic waves to be excited and detected. Optimum design of an EMAT requires understanding the coupling mechanism of energy transfer between the electromagnetic and elastic fields. This is a long-running topic作者: galley 時間: 2025-3-23 07:26
Dokumentation des Erstgespr?chs the electric circuit, and impedance matching is required for improving EMAT’s transduction efficiency. This chapter describes how to fabricate EMAT with examples. Some designs for impedance-matching circuit are also given.作者: 假裝是我 時間: 2025-3-23 12:15 作者: Anonymous 時間: 2025-3-23 15:56 作者: 可忽略 時間: 2025-3-23 19:11 作者: 催眠藥 時間: 2025-3-24 01:38 作者: 是比賽 時間: 2025-3-24 02:54
Handbuch der Forensischen Psychiatrief metals, because it is capable of probing the processes of dislocation movement (Hikata et al. (.); Hikata and Elbaum (.); Cantrell and Yost (.)) and crack nucleation and growth (Buck et al. (.); Richardson (.); Morris et al. (.); Nagy (.)). The sensitivity to microstructural attributes during the 作者: 意外的成功 時間: 2025-3-24 08:23 作者: irradicable 時間: 2025-3-24 14:16
Kriminalprognostische Begutachtunghe solids. But, this is an approximation after all and solid materials exhibit nonlinear responses; the velocities vary in proportion to stress although in very small magnitude in general. This phenomenon, called acoustoelasticity, originates from the anharmonic interatomic potential. This chapter p作者: Amylase 時間: 2025-3-24 17:47
Die Wohlfahrtswirkungen des Waldes,plitude, respectively, which locate in the medium, depending on the individual resonant mode. Different resonant modes provide the information on the elastic property at different positions, and the compilation of them can inversely construct their distribution. This idea is applied in the present c作者: 情節(jié)劇 時間: 2025-3-24 21:10
https://doi.org/10.1007/978-3-662-36323-2ion methods, two of which are picked up in this chapter (see Chap. . for practical inspection cases). One is to use SH plate modes in plates or torsional modes in pipes. Group velocity measurement, at the frequency and wavenumber pinpointed on the dispersion curves, and the mode conversion that occu作者: 合并 時間: 2025-3-25 02:40
978-4-431-56760-8The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Japan KK作者: Optimum 時間: 2025-3-25 05:00
Electromagnetic Acoustic Transducers978-4-431-56036-4Series ISSN 2198-7807 Series E-ISSN 2198-7815 作者: Postulate 時間: 2025-3-25 11:12
https://doi.org/10.1007/978-3-642-47714-0Many EMATs have been developed for bulk waves, surface waves, guided waves, wave focusing, and applications to materials in move and at elevated temperatures. An antenna transmission technique for piezoelectric materials is also proposed. This chapter presents various EMAT structures and their operating principles.作者: Interferons 時間: 2025-3-25 14:27 作者: 招待 時間: 2025-3-25 16:57
Organisation der geistigen ArbeitThis chapter reviews the EMAR application to determine the average grain size of carbon steels (Ogi et al. .) on the basis of the fourth-power frequency dependence of attenuation. The final results are favorably compared with the average of three-dimensional distribution from metallographic observations for various grades.作者: 男學院 時間: 2025-3-25 20:04 作者: 離開 時間: 2025-3-26 02:00
In-Situ Monitoring of Dislocation MobilityThe noncontacting measurement with EMAR allows not only accurate evaluation of absorption loss inside materials but also such measurements at low and high temperatures and during deformation. This chapter shows many applications of EMAR for studying dislocation mobility and interactions between dislocations and point defects.作者: 抓住他投降 時間: 2025-3-26 05:12
Average Grain Size of SteelsThis chapter reviews the EMAR application to determine the average grain size of carbon steels (Ogi et al. .) on the basis of the fourth-power frequency dependence of attenuation. The final results are favorably compared with the average of three-dimensional distribution from metallographic observations for various grades.作者: 替代品 時間: 2025-3-26 11:37
Book 2017Latest editionful amplification mechanism for precise measurements of velocity and attenuation...PART III applies EMAR to studying physical acoustics. New measurements have emerged with regard to four major subjects: in situ monitoring of dislocation behavior, determination of anisotropic elastic constants, point作者: AVID 時間: 2025-3-26 13:50
Nonlinear Acoustics for Microstructural Evolutions. Electromagnetic acoustic resonance (EMAR) again has overcome this problem by superimposing many ultrasonic waves coherently, and as shown later, three methods for nonlinear acoustics have been emerged.作者: 沉思的魚 時間: 2025-3-26 17:53 作者: Stagger 時間: 2025-3-26 22:09
2198-7807 I applies EMAR to studying physical acoustics. New measurements have emerged with regard to four major subjects: in situ monitoring of dislocation behavior, determination of anisotropic elastic constants, point978-4-431-56760-8978-4-431-56036-4Series ISSN 2198-7807 Series E-ISSN 2198-7815 作者: 可耕種 時間: 2025-3-27 02:28
2198-7807 ion of EMATs for individual purposes.Provides many new studi.This second edition?provides comprehensive information on electromagnetic acoustic transducers (EMATs), from the theory and physical principles of EMATs to the construction of systems and their applications to scientific and industrial ult作者: placebo 時間: 2025-3-27 06:14
Die Verbrennung auf der Feuerung,ausing significantly large extra energy losses. Even with EMAT measurement, diffraction loss appears. This chapter describes the attenuation measurement with electromagnetic acoustic resonance (EMAR) and a scheme for the diffraction loss correction for a bulk-wave EMAT.作者: Graduated 時間: 2025-3-27 12:02
Eigentums- und Verm?gensdelinquenzing piezoelectric probes for measuring local Young’s modulus quantitatively. This technique is called resonance ultrasound microscopy, or RUM. This chapter describes the physical principle of the quantitative local Young’s modulus measurement and some experimental results with RUM.作者: 松軟無力 時間: 2025-3-27 16:08
,Das Schuldf?higkeitsgutachten,, the .-value has been determined by measuring plastic strains of tensile specimens (Lankford et al. .) or resonance frequencies with ribbon coupons (Stickels and Mould .). They are destructive measurements. A nondestructive method hopefully a robust tool for online usage has long been needed.作者: RODE 時間: 2025-3-27 18:28
Kriminalprognostische Begutachtunggh in very small magnitude in general. This phenomenon, called acoustoelasticity, originates from the anharmonic interatomic potential. This chapter provides the theoretical background of acoustoelasticity and a number of measurement result with EMATs on applied and residual stresses of industrial importance.作者: Ancestor 時間: 2025-3-28 00:32
Die Wohlfahrtswirkungen des Waldes,elastic property at different positions, and the compilation of them can inversely construct their distribution. This idea is applied in the present chapter, where the axial-shear-wave resonance infers the case depth in cylindrical steel rods induced by induction hardening.作者: 阻塞 時間: 2025-3-28 03:07 作者: AMEND 時間: 2025-3-28 08:19
Introduction,and is the main subject of this book. Brief historical sketch is provided as for the progress of understanding the coupling mechanisms with EMATs along with the EMAR measurements of the earlier generations.作者: 逃避現(xiàn)實 時間: 2025-3-28 14:12
Book 2017Latest editionATs to the construction of systems and their applications to scientific and industrial ultrasonic measurements on materials. The original version has been complemented with selected ideas on ultrasonic measurement that have emerged since the first edition was released. ..The book is divided into fou作者: Invigorate 時間: 2025-3-28 15:37
Coupling Mechanism and many studies appeared (Thompson (., ., .); Kawashima (., .); Il’in and Kharitonov (.); Wilbrand (., .); Ogi (.); Ogi et al. (.); Ribichini et al. (.)). This chapter presents the comprehensive analysis on physical principles of EMATs.作者: 協(xié)定 時間: 2025-3-28 19:09
Elastic Constants and Internal Friction of Advanced Materialsncontacting nature of EMAR allows accurate internal friction measurement as well. This chapter shows the mode-selective principle of the EMAR and its application for measuring elastic anelastic coefficients of various materials including metals, composites, ceramics, porous materials, thin films, and piezoelectric materials.作者: 的是兄弟 時間: 2025-3-28 23:07
Detection of Flaw and Corrosionrs at the defect edges, provide the information on the remaining thickness of the waveguides. The other is the point-focusing EMAT, which enables detecting stress corrosion cracking located close to the welded joint of austenitic stainless steel. A meander-line coil is designed to focus the generated SV waves at an intended point.作者: NUDGE 時間: 2025-3-29 04:08 作者: Bravado 時間: 2025-3-29 10:25 作者: 整理 時間: 2025-3-29 14:04
Online Texture Monitoring of Steel Sheets, the .-value has been determined by measuring plastic strains of tensile specimens (Lankford et al. .) or resonance frequencies with ribbon coupons (Stickels and Mould .). They are destructive measurements. A nondestructive method hopefully a robust tool for online usage has long been needed.作者: Halfhearted 時間: 2025-3-29 19:38 作者: Indent 時間: 2025-3-29 23:18 作者: Injunction 時間: 2025-3-30 02:51 作者: CANDY 時間: 2025-3-30 06:30
,W?rmewirtschaftliche Einrichtungen,ncontacting nature of EMAR allows accurate internal friction measurement as well. This chapter shows the mode-selective principle of the EMAR and its application for measuring elastic anelastic coefficients of various materials including metals, composites, ceramics, porous materials, thin films, and piezoelectric materials.作者: 裝勇敢地做 時間: 2025-3-30 09:16
https://doi.org/10.1007/978-3-662-36323-2rs at the defect edges, provide the information on the remaining thickness of the waveguides. The other is the point-focusing EMAT, which enables detecting stress corrosion cracking located close to the welded joint of austenitic stainless steel. A meander-line coil is designed to focus the generated SV waves at an intended point.作者: elastic 時間: 2025-3-30 15:59
Introduction,he importance is demonstrated by the signal distortion induced by a piezoelectric transducer and also by comparing the received signals observed by a piezoelectric transducer and an electromagnetic acoustic transducer (EMAT) on the same metal plate. Only one weakness of EMATs is the low transduction作者: 豪華 時間: 2025-3-30 17:56 作者: Substance 時間: 2025-3-31 00:06
Brief Instruction to Build EMATs the electric circuit, and impedance matching is required for improving EMAT’s transduction efficiency. This chapter describes how to fabricate EMAT with examples. Some designs for impedance-matching circuit are also given.
