Academic literature on the topic 'Contact resonance AFM'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Contact resonance AFM.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Contact resonance AFM"

1

Dillon, Eoghan, Kevin Kjoller, and Craig Prater. "Lorentz Contact Resonance Imaging for Atomic Force Microscopes: Probing Mechanical and Thermal Properties on the Nanoscale." Microscopy Today 21, no. 6 (2013): 18–24. http://dx.doi.org/10.1017/s1551929513000989.

Full text
Abstract:
Atomic force microscopy (AFM) has been widely used in both industry and academia for imaging the surface topography of a material with nanoscale resolution. However, often little other information is obtained. Contact resonance AFM (CR-AFM) is a technique that can provide information about the viscoelastic properties of a material in contact with an AFM probe by measuring the contact stiffness between the probe and sample. In CR-AFM, an AFM cantilever is oscillated, and the amplitude and frequency of the resonance modes of the cantilever are monitored. When a probe or sample is oscillated, the
APA, Harvard, Vancouver, ISO, and other styles
2

Glover, Christopher C., Jason P. Killgore, and Ryan C. Tung. "Scanning speed phenomenon in contact-resonance atomic force microscopy." Beilstein Journal of Nanotechnology 9 (March 21, 2018): 945–52. http://dx.doi.org/10.3762/bjnano.9.87.

Full text
Abstract:
This work presents data confirming the existence of a scan speed related phenomenon in contact-mode atomic force microscopy (AFM). Specifically, contact-resonance spectroscopy is used to interrogate this phenomenon. Above a critical scan speed, a monotonic decrease in the recorded contact-resonance frequency is observed with increasing scan speed. Proper characterization and understanding of this phenomenon is necessary to conduct accurate quantitative imaging using contact-resonance AFM, and other contact-mode AFM techniques, at higher scan speeds. A squeeze film hydrodynamic theory is propos
APA, Harvard, Vancouver, ISO, and other styles
3

Stan, Gheorghe, Sean W. King, and Robert F. Cook. "Elastic modulus of low-k dielectric thin films measured by load-dependent contact-resonance atomic force microscopy." Journal of Materials Research 24, no. 9 (2009): 2960–64. http://dx.doi.org/10.1557/jmr.2009.0357.

Full text
Abstract:
Correlated force and contact resonance versus displacement responses have been resolved using load-dependent contact-resonance atomic force microscopy (AFM) to determine the elastic modulus of low-k dielectric thin films. The measurements consisted of recording simultaneously both the deflection and resonance frequency shift of an AFM cantilever probe as the probe was gradually brought in and out of contact. As the applied forces were restricted to the range of adhesive forces, low-k dielectric films of elastic modulus varying from GPa to hundreds of GPa were measurable in this investigation.
APA, Harvard, Vancouver, ISO, and other styles
4

Fahrbach, Michael, Sebastian Friedrich, Brunero Cappella, and Erwin Peiner. "Calibrating a high-speed contact-resonance profilometer." Journal of Sensors and Sensor Systems 9, no. 2 (2020): 179–87. http://dx.doi.org/10.5194/jsss-9-179-2020.

Full text
Abstract:
Abstract. A European EMPIR project, which aims to use large-scale, 5 mm × 200 µm × 50 µm (L×W×H), piezoresistive microprobes for contact resonance applications, a well-established measurement mode of atomic force microscopes (AFMs), is being funded. As the probes used in this project are much larger in size than typical AFM probes, however, some of the simplifications and assumptions made for AFM probes are not applicable. This study presents a guide on how to systematically create a model that replicates the dynamic behavior of microprobes. The model includes variables such as air damping, no
APA, Harvard, Vancouver, ISO, and other styles
5

Xie, Ping, Lei Zhang, and Qing Ze Zou. "Resonance Suppression on Nanoscale Viscoelasticity Measurement." Advanced Materials Research 528 (June 2012): 75–79. http://dx.doi.org/10.4028/www.scientific.net/amr.528.75.

Full text
Abstract:
During the broadband viscoelasticity measurement process, when the frequency of the excitation force become high relative to the resonant frequency or the bandwidth of the instrument dynamics, the adverse instrument dynamics is motivated, which causes the cantilever resonance and generates large measurement errors in the measurement data. To solve this problem, an approach to suppress the cantilever resonance on the broadband viscoelasticity measurement is proposed. Firstly, Atomic force microscope (AFM) system dynamic is analyzed by using a dynamic signal analyzer (DSA) in the z-axis. And a n
APA, Harvard, Vancouver, ISO, and other styles
6

Friedrich, Sebastian, and Brunero Cappella. "Application of contact-resonance AFM methods to polymer samples." Beilstein Journal of Nanotechnology 11 (November 12, 2020): 1714–27. http://dx.doi.org/10.3762/bjnano.11.154.

Full text
Abstract:
Contact-resonance AFM (CR-AFM) has been used in recent years for the measurement of mechanical properties of rather stiff materials, such as ceramics or metals, but also of some polymers. Compared with other techniques providing information on the mechanical properties of a sample, notably force–distance curves, CR-AFM has a much shorter acquisition time. This compensates in part the incomplete theoretical understanding of the underlying physical phenomena and of factors influencing the measurements. A commonly used method to analyze CR data requires the determination of the relative position
APA, Harvard, Vancouver, ISO, and other styles
7

Parlak, Zehra, Qing Tu, and Stefan Zauscher. "Liquid contact resonance AFM: analytical models, experiments, and limitations." Nanotechnology 25, no. 44 (2014): 445703. http://dx.doi.org/10.1088/0957-4484/25/44/445703.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wang, Xinzhou, Yuhe Deng, Yanjun Li, Kevin Kjoller, Anirban Roy, and Siqun Wang. "In situ identification of the molecular-scale interactions of phenol-formaldehyde resin and wood cell walls using infrared nanospectroscopy." RSC Advances 6, no. 80 (2016): 76318–24. http://dx.doi.org/10.1039/c6ra13159j.

Full text
Abstract:
Atomic force microscope infrared spectroscopy (AFM-IR), contact resonance AFM (CR-AFM) measurement, and nanoindentation were combined to identify the interactions between wood cell wall and phenol-formaldehyde resin (PF) on the nanoscale.
APA, Harvard, Vancouver, ISO, and other styles
9

Zhang, Gai Mei, Li Ping Yang, Chen Qiang, Yuan Wei, Jian Dong Lu, and Dong Sheng Jiang. "Analysis on the Contact Mechanics between Tip and Sample in Atomic Force Acoustic Microscope Method." Advanced Materials Research 800 (September 2013): 325–29. http://dx.doi.org/10.4028/www.scientific.net/amr.800.325.

Full text
Abstract:
Atomic force acoustic microscopy (AFAM) is a technique combining the atomic force microscope (AFM) and ultrasonic technique, where the cantilever or the sample surface is vibrated at ultrasonic frequencies while a sample surface is scanned with the sensor tip contacting the sample. At a consequence, the amplitude of the cantilever vibration as well as the shift of the cantilever resonance frequencies contain information about local tip-sample contact stiffness and can be used as imaging quantities. It has been demonstrated to be a powerful tool for the investigation of the local elastic prospe
APA, Harvard, Vancouver, ISO, and other styles
10

Stan, Gheorghe, and Santiago D. Solares. "Frequency, amplitude, and phase measurements in contact resonance atomic force microscopies." Beilstein Journal of Nanotechnology 5 (March 12, 2014): 278–88. http://dx.doi.org/10.3762/bjnano.5.30.

Full text
Abstract:
The resonance frequency, amplitude, and phase response of the first two eigenmodes of two contact-resonance atomic force microscopy (CR-AFM) configurations, which differ in the method used to excite the system (cantilever base vs sample excitation), are analyzed in this work. Similarities and differences in the observables of the cantilever dynamics, as well as the different effect of the tip–sample contact properties on those observables in each configuration are discussed. Finally, the expected accuracy of CR-AFM using phase-locked loop detection is investigated and quantification of the typ
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Contact resonance AFM"

1

Mege, Fabrice. "AFM à contact résonant : développement et modélisation." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00618676.

Full text
Abstract:
Avec l'intégration de circuits intégrés de plus en plus denses, le besoin d'outils de caractérisation adaptés à ces échelles se fait ressentir. Identifier et analyser les problèmes de fiabilité survenant dans ces structures à des dimensions inférieures à 100 nm demande la mise au point d'instruments innovants. Ce travail de thèse a consisté dans un premier temps à développer un appareil à champs proches sensible aux propriétés mécaniques de surface, et dans un second temps à analyser les résultats expérimentaux en s'appuyant sur des approches analytiques et/ou numériques. Désigné sous le nom d
APA, Harvard, Vancouver, ISO, and other styles
2

Lübbe, Jannis Ralph Ulrich. "Cantilever properties and noise figures in high-resolution non-contact atomic force microscopy." Doctoral thesis, 2013. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2013040310741.

Full text
Abstract:
Different methods for the determination of cantilever properties in non-contact atomic force microscopy (NC-AFM) are under investigation. A key aspect is the determination of the cantilever stiffness being essential for a quantitative NC-AFM data analysis including the extraction of the tip-surface interaction force and potential. Furthermore, a systematic analysis of the displacement noise in the cantilever oscillation detection is performed with a special focus on the thermally excited cantilever oscillation. The propagation from displacement noise to frequency shift noise is studied under c
APA, Harvard, Vancouver, ISO, and other styles
3

(11013732), Devin M. Kalafut. "Multistability in microbeams: Numerical simulations and experiments in capacitive switches and resonant atomic force microscopy systems." Thesis, 2021.

Find full text
Abstract:
Microelectromechanical systems (MEMS) depend on mechanical deformation to sense their environment, enhance electrical circuitry, or store data. Nonlinear forces arising from multiphysics phenomena at the micro- and nanoscale -- van der Waals forces, electrostatic fields, dielectric charging, capillary forces, surface roughness, asperity interactions -- lead to challenging problems for analysis, simulation, and measurement of the deforming device elements. Herein, a foundation for the study of mechanical deformation is provided through computational and experimental studies of MEMS microcantile
APA, Harvard, Vancouver, ISO, and other styles
4

Pop-Georgievski, Ognen. "Ultratenké polymerní filmy na pevných površích: studium fyzikálními metodami." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-322597.

Full text
Abstract:
The presented doctoral research was aimed at preparation and characterization of ultra thin polymer films on solid substrates using different physical techniques. Each of these physical techniques probes selectively different characteristics of the films. While some of the techniques are strong in the predetermination of some unique properties of the layers, they might be limited and give no specific/conclusive information about some other important characteristics. Therefore, only the combination of the techniques provides a profound picture of the thickness, architecture, composition and fun
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Contact resonance AFM"

1

Vardhanabhuti, Varut, Julia James, Rosemary Gray, Rehaan Nensey, Vivien Shuen, and Tishi Ninan, eds. MCQs for the First FRCR. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780199584024.001.0001.

Full text
Abstract:
This book aims to be the most comprehensive coverage of the topics covered in the new look First Fellowship of Royal College of Radiology (FRCR) examination, which includes new topics such as ultrasound and magnetic resonance. Led by specialist trainees with recent exam experience and contributions from experienced senior consultants and examiners, this book offers not only relevant content and valuable insights, but also visually enhanced answer sections (including diagrams and tables) that aim to improve and enhance understanding of key concepts in medical physics and radiation protection. E
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Contact resonance AFM"

1

Imširović, Bilal, Enver Zerem, and Emir Gušo. "Role of Imaging in Small Bowel Crohn’s Disease." In Endoscopy in Small Bowel Diseases. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96098.

Full text
Abstract:
The small intestine is a challenging organ for clinical and radiological evaluation. The introduction of radiological imaging techniques, which do not significantly disturb patients’ comfort and safety, attempts to obtain an adequate diagnosis and valuable information. The aim is to determine the capabilities and potential of ultrasound, computed tomography (CT), diffusion-weighted imaging (DWI), and contrast-enhanced magnetic resonance (MR) enterography to establish the diagnosis and to evaluate the severity and activity of intestinal inflammation. Conventional ultrasound is a suitable orientation method in the initial evaluation of patients with Crohn’s disease. At the same time, contrast-enhanced MR enterography provides an excellent assessment of disease activity, as well as the complications that accompany it. Contrast-enhanced MR enterography, combined with DWI, allows for excellent evaluation of disease activity and problems or difficulties following it. The examination can be repeated, controlled and can monitor patients with this disease.
APA, Harvard, Vancouver, ISO, and other styles
2

Kjerschow, Peder Christian. "Det klingendes meningspotensial og dets slumrende klangbunn i lytteren: Utkast til en musikkinspirert livsanskuelse." In Musikkfilosofiske tekster. Tanker om musikk – og språk, tolkning, erfaring, tid, klang, stillhet m.m. Cappelen Damm Akademisk/NOASP, 2020. http://dx.doi.org/10.23865/noasp.115.ch16.

Full text
Abstract:
In this essay I am aiming to sketch a context of my view of music, taking the form of a musically-inspired Weltanschauung [world view]. Confronted with “great” music of all types, I experience the particular ability of music to bring consciousness into a state of listening, attentive “passivity”, without the need for an explanation of what it is about. Afterwards, the thinking consciousness may rise to active reflection on the unique potential of meaning in music – so unlike anything else – and on the equally enigmatic resonant disposition in me that responds to music as an essential meaningful appeal. Although music has all the characteristics of its human origin and historical context, it may be considered as a spring welling from the very source of the world: Its potential of meaning is rooted deeper than human culture. Thus, music offers a confrontation with objective reality, not with something “staged” by our consciousness or, not to mention, by our brain. This musical confrontation with reality has led to my questioning the subjectivism of Kant and especially Fichte, and to an interest in Schelling’s philosophy of nature as a convincing refutation of subjectivistic epistemology. In the name of reality, I touch on the problematic interpretations and conclusions of neuroscience and brain research concerning self-perception. This sort of “philosophy”, where the very self (i.e. the “I” or the subject) is identified with the object studied, i.e. the brain itself. This view may also imply a reductionistic understanding of the experience of meaningful music as “staged” by the reward system of the brain.
APA, Harvard, Vancouver, ISO, and other styles
3

Hota, Surabhi. "Synchrotron Based Techniques in Soil Analysis: A Modern Approach." In Technology in Agriculture [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99176.

Full text
Abstract:
Soil is a highly heterogenous system where a number of physical, chemical and biological processes are taking place. The study of these processes requires analytical techniques. The electromagnetic radiations in the form spectroscopy, X-Ray diffraction, magnetic resonance etc. have been used in the field of soil analysis since decades. The study of soil nutrients, mineralogy, organic matter and complex compounds in soils use these techniques and are successful tools till date. But these come with a limitation of lesser spatial and spectral resolution, time consuming sample preparation and destructive methods of study which are mostly ex-situ. In contrast to the conventional spectroscopic techniques, the synchrotron facility is of high precision and enables non-destructive study of the samples to a nano scale. The technique uses the high intensity synchrotron radiation which is produced in a special facility, where the electrons are ejected using very high voltage and accelerated in changing magnetic field, at a speed of light resulting in a very bright radiation that enables a very précised study of the subject. For example, in studying the dynamics of P and N in soils, SR aided XAS are used to study the K-edge spectra of these nutrients, without any matrix interference, which used to be a problem in conventional SEM, IR or NMR spectroscopy. These radiations provide high energy in GeV, which imparts high sensitivity and nanoscale detection. Basically, the SR facility improves the precision of the existing spectroscopic techniques. This chapter discusses how the Synchrotron radiations aid to improve precision in various field of soil analysis such as, carbon chemistry, nutrient dynamics, heavy metal and contaminant speciation and rhizosphere study. However, the technique also come with major limitations of requirement of very high skill for preparation of samples, inadequate availability of references for studies related to absorption spectrum and control of radiation damage. Applications and limitations of the technique thoroughly reviewed in this chapter with an aim to provide a brief idea of this new dimension of soil analysis.
APA, Harvard, Vancouver, ISO, and other styles
4

Norton, Jacqui. "The Diggers’ Festival, Organising a community festival with political connotations." In Focus On Festivals. Goodfellow Publishers, 2015. http://dx.doi.org/10.23912/978-1-910158-15-9-2631.

Full text
Abstract:
This chapter examines the organisation of a community festival from an ethnographic perspective drawn from the festival organiser’s viewpoint. It will provide some context on the reasons for founding the Diggers’ Festival and examine key issues and difficulties surrounding the launch and development of a small festival that relates to historical political activities in the market town of Wellingborough, Northamptonshire, UK. As we shall see, most current political festivals in the UK tend to be events launched to commemorate historical milestones that have a political resonance. The chapter will make specific reference to the festival’s funding, audiences and branding, concluding with recommendations on how to move the festival forward. During 2010 the author was asked by the Independent Socialists of Wellingborough (ISW) to organise an evening event to commemorate the 17th century radicals known as the Diggers. As an individual with socialist leanings, the author agreed to promote the first event, which was held during March 2011, and was launched and branded as the Wellingborough Diggers’ Festival. Even though it was in its infancy arguably only an evening event with two professional performers, Ian Saville, a magician who promotes himself as ‘Magic for Socialism’ (Saville, n.d.), and well-established local folk and Americana band The Old Speckled Men, booked, it was felt necessary to launch the festival name and the branding, with the aim being to produce a steady growth into the fourth or fifth years. It was essential to raise awareness of the identity and purpose of the festival amongst like-minded individuals, the local community and people from surrounding areas. The fourth festival grew from being organised solely by the author to having a committee of an additional five volunteers who coordinated an afternoon fringe event based in a town centre public house with three live music artists/bands, including punk/poet Attila the Stockbroker. A writer who had written historical fiction for teenagers, including one that takes its inspiration from Gerrard Winstan- ley and the Diggers, was invited as a guest speaker to present her work in the local library. The local museum hosted a week long display on the Diggers including a copy of the declaration and a copy of a field map dated 1838 identifying the location of the Bareshanks field (the site of the Wellingborough digger community). The programme for the evening event commenced with a local author Alan Moore (V for Vendetta, Watchmen) as a key speaker, followed by performances by two professional live bands with ‘left’ tendencies. In addition to the general considerations of organising a festival, for instance audience, budget, funding, licensing, entertainment and promotion, coordinating a festival with such strong socialist values was going to be a challenge because of the political connotations.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Contact resonance AFM"

1

Arafat, Haider N., Ali H. Nayfeh, and Elihab M. Abdel-Rahman. "Modal Interactions in Contact-Mode Atomic Force Microscopes." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14938.

Full text
Abstract:
Atomic force microscopes (AFM) are used to estimate material and surface properties. When using contact-mode AFM, the specimen or the probe is excited near a natural frequency of the system to estimate the linear coefficient of the contact stiffness. Because higher modes offer lower thermal noise, higher quality factors, and higher sensitivity to stiff samples, their use in this procedure is more desirable. However, these modes are candidates for internal resonances, where the energy being fed into one mode may be channeled to another mode. If such interactions are ignored, the results obtaine
APA, Harvard, Vancouver, ISO, and other styles
2

Lo, Michael, Eoghan Dillon, Qichi Hu, et al. "AFM-Based Chemical and Mechanical Property Characterization of Interconnects and Defects." In ISTFA 2013. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.istfa2013p0159.

Full text
Abstract:
Abstract Spectroscopic characterization of interconnects and circuits in semiconductor devices has become increasingly complicated as dimensions for breakthroughs and failure analysis are continuously shrinking. To achieve high spatial resolution infrared (IR) spectroscopic information, a pulsed infrared laser can be coupled to an atomic force microscope in the atomic force microscopy IR (AFM-IR) technique. The combination of AFM-IR and Lorentz contact resonance AFM (LCR-AFM) has great potential for providing high spatial resolution chemical and mechanical analysis. To demonstrate the feasibil
APA, Harvard, Vancouver, ISO, and other styles
3

Laxminarayana, Karthik, and Nader Jalili. "A Review of Recent Developments in Atomic Force Microscopy Systems With Application to Manufacturing and Biological Processes." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41170.

Full text
Abstract:
The atomic force microscope (AFM) system has evolved into a useful tool for direct measurements of microstructural parameters and intermolecular forces at nanoscale level with atomic-resolution characterization. Typically, these microcantilever systems are operated in three open-loop modes; non-contact mode, contact mode, and tapping mode. In order to probe electric, magnetic, and/or atomic forces of a selected sample, the non-contact mode is utilized by moving the cantilever slightly away from the sample surface and oscillating the cantilever at or near its natural resonance frequency. Altern
APA, Harvard, Vancouver, ISO, and other styles
4

Huang, Wei, and Andrew J. Dick. "Measuring Effective Modulus With Bifurcation Based Atomic Force Microscope Method." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47503.

Full text
Abstract:
The atomic force microscope (AFM) is a high-resolution measurement tool for sample topography and material properties in nano-scale and micro-scale research. The dynamics of the cantilever probe in AFM is affected by the intrinsically nonlinear interaction between the probe tip and the sample. Previous works have shown that in off-resonance excited intermittent-contact AFM, a period-doubling bifurcation occurs as a result of the nonlinearity. The sub-harmonic amplitude of the response is used as the source of contrast to measure the effective modulus of the sample. This paper further investiga
APA, Harvard, Vancouver, ISO, and other styles
5

Stark, R. W. "Force Feedback in Dynamic Atomic Force Microscopy." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81264.

Full text
Abstract:
The feedback perspective of dynamic AFM provides a powerful tool to investigate the non-linear system dynamics from a system theoretic point of view. Including the higher order dynamics of the extended cantilever beam in the model the contact resonances can be reproduced faithfully without the need to solve the partial differential equation of motion directly. The investigation of the non-linear dynamics provides valuable insight into the generation of higher harmonics in dynamic AFM. However, the light lever detection scheme is widely used in dynamic AFM. This means that — strictly speaking —
APA, Harvard, Vancouver, ISO, and other styles
6

Mahmoodi, S. Nima, Amin Salehi-Khojin, and Mehdi Ahmadian. "Nonlinear Force Analysis of Atomic Force Microscopy." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48482.

Full text
Abstract:
The objective of this work is to highlight and discuss some critical conditions in which the imprecision of atomic force microscopy (AFM) system will be intensified. To precisely address these issues, we developed a complete close form solution for a non-linear motion of AFM system subjected to non-linear contact and van der Waals forces. Galerkin method and multiple time scale approach are used to solve the governing non-linear differential equation of the AFM system. A nonlinear frequency-response equation is then obtained as a function of displacement excitation, resonance frequency and ass
APA, Harvard, Vancouver, ISO, and other styles
7

Panunzio, Alfonso M., Loïc Salles, Christoph Schwingshackl, and Muzio Gola. "Asymptotic Numerical Method and Polynomial Chaos Expansion for the Study of Stochastic Non-Linear Normal Modes." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43560.

Full text
Abstract:
Nonlinear normal mode (NNM) analysis is one emerging technique to analyse the nonlinear vibration of bladed-disk. It links the resonance frequency to the energy present in the system, and allows a simple identification of internal resonances in the structure. Non-linear vibration analysis is traditionally carried out under the assumption that the mechanical properties and forcing function are deterministic. Since every mechanical system is by nature uncertain a truly accurate nonlinear dynamic analysis requires the inclusion of random variables in the response predictions. The propagation of r
APA, Harvard, Vancouver, ISO, and other styles
8

Miyasaka, C., B. R. Tittmann, T. Adachi, and A. Yamaji. "Theoretical Approach to Contrast Mechanism for U-AFM." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1636.

Full text
Abstract:
When the Ultrasonic-Atomic Force Microscope (U-AFM) is used to form an image of a surface of a specimen having discontinuities, contrast of the specimen in the image is usually stronger than that of an image formed by a conventional Atomic Force Microscope (AFM). In this article, the mechanism of the contrast of the image obtained by the U-AFM was explained by theoretical analysis. A ceramic and metal jointed bar (Steel/Cu/Si3N4) was selected as a specimen for this study. The specimen was located on the surface of a disc transducer generating ultrasonic waves up to 500 KHz, and was vibrated, w
APA, Harvard, Vancouver, ISO, and other styles
9

Ahmadian, M. T., M. H. Kahrobaiyan, P. Haghighi, and A. Yousefi. "Torsional Sensitivity and Resonant Frequency of an AFM With Parallel Sidewall Probes." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28632.

Full text
Abstract:
The resonant frequencies and torsional sensitivities of an atomic force microscope (AFM) assembled cantilever probe which comprises a horizontal cantilever, two vertical extensions and two tips located at their free ends are studied. This probe makes the AFM capable of measuring, for instance, the outer/inner diameter, roundness and roughness of microstructures like micro-holes and micro nozzles which leads to a time-saving swift scanning process. In this work, the effects of the sample surface contact stiffness and the geometrical parameters such as the ratio of the vertical extension length
APA, Harvard, Vancouver, ISO, and other styles
10

Nysten, Bernard, Christian Fretigny, and Stephane Cuenot. "Elastic modulus of nanomaterials: resonant contact-AFM measurement and reduced-size effects (Invited Paper)." In Nondestructive Evaulation for Health Monitoring and Diagnostics, edited by Robert E. Geer, Norbert Meyendorf, George Y. Baaklini, and Bernd Michel. SPIE, 2005. http://dx.doi.org/10.1117/12.604981.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!