Strain and Stress Analysis Through Heterodyne Holographic Interferometry PDF Download
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Author: René Dändliker
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
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Book Description
Author: René Dändliker
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
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Book Description
Author: Valeriĭ Pavlovich Shchepinov
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 512
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Book Description
In this unique book, Shchepinov and his colleagues introduce and discuss the development and application of the increasingly important technique; holographic and speckle interferometry employed in the investigation of structure and material deformation and fracture processes. The authors consider the main physical and metrological aspects of interferometry from the deformation analysis viewpoint, emphasizing the need for (and the difficulties in obtaining) high quality and accurate fringe patterns. The advantages and outstanding features of the techniques are discussed in the second part of the book and these are compared with conventional methods of experimental mechanics. The book is illustrated with numerous unique interferograms to demonstrate the various fringe patterns which must be quantitively interpreted to obtain strain and stress values with the required accuracy. All fringe patterns presented are primary sources of the corresponding displacement and strain distributions contained in the book. The results illustrate how holographic and speckle interferometry can be used for development in various scientific and applied subjects in the fields of solid and fracture mechanics. Written specifically for researchers and engineers specializing in the strength of structures and materials, this book will also serve to introduce students to the fundamentals of holographic and speckle interferometry and the way these methods can be applied in experimental mechanics.
Author: W. Schumann
Publisher: Springer
ISBN: 3540352414
Category : Science
Languages : en
Pages : 204
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Book Description
This small book intends to build a bridge between the aspects of Optics and of Mechanics that are involved in the application of holographie interferometry to deformation analysis of opaque bodies. As such, it follows in some way the footsteps ofthe late Prof. H. Favre, who already in 1927 proposed to use interferometry for deformation measurements (refer to his thesis "Sur une nouveHe methode optique de determination des tensions interieures"). Many a concept also originates from the research and lectures of Prof. W. Prager in continuum mechanies, Profs. D.C. Drucker and C. Mylonas in experimental mechanics, Prof. C.R. Steele in sheH theory and Prof. W. Lukosz in physieal optics. Further stimulation arose in dis cussions about holography with Profs. R. Dändliker, J. Der Hovanesian and H. Tiziani as weH as with Drs. B. Ineiehen and F.M. Mottier. The contribution of Drs. W. Wüthrich, P. Bohler and G. Teichmann must also be acknowledged, the latter more partieularly for rendering valuable assistance on the delieate points of tensor calculus as weH as in the drawing of the figures. FuH gratitude must also be expressed to those who made the publication of this book possible: Dr. D. MacAdam who openheartedly accepted it in his series, Dr. H. Lotsch and the collab orators of Springer-Verlag, Mr. P. Hagnauer who revised the original text and Mrs. L. Wehrli whose patience was tried in carefully typing the manuscript, whieh Mr. F. Dufour read over again
Author: B. Ineichen
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Book Description
The basic problems of quantitative determination of mechanical strain of vibrating object through holographic interferometry are discussed. Time-average holography, which is most commonly used for holographic vibration analysis, can not be combined with heterodyne evaluation, since the interference fringes are already frozen in the hologram. Synchronized double-pulse holography can be employed in the same manner as pulsed double exposure holography. Moreover, real-time holography allows to investigate the temporal behaviour of vibrations, but only at one or a few points sitaneously, depending on the number of detectors employed. Both methods were tested. The method uses essentially heterodyne holographic interferometry for the quantitative determination of the surface displacement from the fringe pattern in the image plane. Finally, a nearly fully automated camera with photothermoplastic film is presented to achieve fast and dry in-situ recording and processing of holograms with high diffraction efficiency. (Author).
Author: W. Schumann
Publisher: Springer
ISBN: 3540389814
Category : Science
Languages : en
Pages : 243
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Book Description
In this book series on Optical Sciences, holography has been the subject of three previous volumes. In particular, Vol. 16, written by one of us (W. S. ) and Dr. M. Dubas, treated holographic interferometry of opaque bodies from the standpoint of deformation analysis. However, the fundamental principles of holography are developed there only briefly in preparation for a discussion of interference fringe modifications. This new volume in the series is intended to consider in detail many topics which were previously omitted, such as the deformation or distortion of holo graphic images, the theory of volume holograms, composite or multiplex holo graphy, holographic interferometry of transparent media, time dependent effects, holographic contouring, and applications of fringe modifications to the deformation of opaque bodies. In addition, these and other subjects will be treated with the same unifying concept developed in Vol. 16, but with an addi tional emphasis on those features that have their origins in classical optics, espe cially the small-wavelength approach, the coupled-wave theory, and the Seidel aberrations. Since the field of holography and its various applications is growing rapidly, it is impossible to be comprehensive in a single book. Every effort has beep. made to avoid unnecessary duplication of Vol. 16. For example, displace ment and fringe localization problems are only briefly discussed, while some modification techniques (e. g. , sandwich holography) are not included. When needed, however, the reader is directly referred to complementary publications.
Author: Walter Schumann
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 252
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Book Description
Author: R. Dandliker
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Book Description
The basic problems of quantitative determination of mechanical strain through holographic interferometry are discussed. A solution based on the calculation of local derivatives of the holographically recorded surface displacements is described. This method uses essentially heterodyne holographic interferometry for the quantitative determination of the surface displacement from the fringe pattern in the image plane. With this technique the interference phase can be measured with an accuracy and reproducibility of + or - 0.3 deg at any point in the fringe pattern, corresponding to an interpolation of better than .001 of one fringe. Numerical examples are given for the sensitivity and accuracy of surface strain measurements and the determination of bending and torsion. Experimental results for bending and torsion of arbitrarily curved and twisted space beams, such as turbine blades, are reported. Accuracy and agreement with theory are within a few percent. (Author).
Author: P. Jacquot
Publisher: Springer Science & Business Media
ISBN: 3642573231
Category : Science
Languages : en
Pages : 661
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Book Description
These proceedings reflect the work presented at the conference "Interferometry in Speckle Light: Theory and Applications", held at the Ecole Polytechnique Federale de Lausanne, (EPFL), the Swiss Federal Institute of Technology in Lausanne, Switzerland. The event took place from September 25 to September 28, 2000. Thanks to the diligence of the authors, this book has been published just in time for the conference. Writing this preface in July, in anticipation of the conference, we have tried to envisage how this book will benefit the quality of discourse between authors and attendees. "Interferometry in Speckle Light: Theory and Applications" results from a bottom-up approach and is original in several ways. This conference is not part of a series; on the contrary, it is a single event. The idea of gathering scientists and engineers for a general discussion on the theory and the practice of interferometry, involving rough, non-optically polished objects, was "in the air". An opportunity of this sort was not provided by any of the conferences scheduled when the present one was conceived. For this reason, it was easy to convince a small number of renowned researchers, all of them active in the field of holographic and speckle interferometry, to organize a conference. To be specific, they are the people listed below as members of the scientific and local committees. At the same time, a particular circumstance, namely the retirement of Professor L. Pflug, helped to detennine the location of the meeting.
Author:
Publisher: Elsevier
ISBN: 0080887570
Category : Science
Languages : en
Pages : 377
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Book Description
Progress in Optics
Author: Akhtar S. Khan
Publisher: Pearson
ISBN:
Category : Science
Languages : en
Pages : 278
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Book Description
The authors realized that there are currently no books in the marketplace that include sufficient solved examples, along with the ability to cover theories of experimental technique, in such a way as to promote self-teaching by the reader. The authors' objective is to allow the reader to review the materials before stepping into a laboratory situation. Chapters are written in a very concise, easily understandable manner and features the inclusion of ample solved equations, designed to test the understanding of featured topics. Chapter topics include: Stress, Strain, and Stress-Strain Relationships; Metal-Foil Resistance Strain Gages; Strain Gage Circuitry, Transducers, and Data Analysis; Photoelasticity; Photoelasticity-Coating Method; Geometric Moiré Techniques in Strain Analysis; Holographic Interferometry; and Computer Data Acquisition and Control Systems. For self-study in Experimental Stress Analysis.
