Strain and Stress Analysis by Holographic and Speckle Interferometry

Strain and Stress Analysis by Holographic and Speckle Interferometry PDF

Author: Valeriĭ Pavlovich Shchepinov

Publisher:

Published: 1996-05-27

Total Pages: 512

ISBN-13:

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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.

Interferometry in Speckle Light

Interferometry in Speckle Light PDF

Author: P. Jacquot

Publisher: Springer Science & Business Media

Published: 2012-02-02

Total Pages: 661

ISBN-13: 3642573231

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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.

Interference-optical Methods of Solid Mechanics

Interference-optical Methods of Solid Mechanics PDF

Author: Igor A. Razumovsky

Publisher: Springer Science & Business Media

Published: 2011-02-01

Total Pages: 187

ISBN-13: 3642112226

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This reference tutorial contains modern experimental approaches to analysis of strain-stress distribution based on interference-optical methods of registration of strain or displacement fields, including coherent-optical techniques (holographic interferometry, speckle photography, electronic digital speckle interferometry techniques) and photoelastic methods as well as the shadow optical method of caustic. The book describes the theory, efficient scope of application in the every-day practice and the problems of further development of these techniques. Much attention is paid to new and promising advanced developments in the field of observation and computational methods for study of residual stress, determination of fracture mechanics parameters and material deformation characteristics. The content corresponds to the course of lectures delivered by the author at the N.E. Bauman Moscow State Technical University. It is intended for technical university students, research engineers and postgraduate students who are doing analysis of strain-stress state and strength of structural elements.

Strain Measurements and Stress Analysis

Strain Measurements and Stress Analysis PDF

Author: Akhtar S. Khan

Publisher: Pearson

Published: 2001

Total Pages: 278

ISBN-13:

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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.

Holographic Interferometry

Holographic Interferometry PDF

Author: Charles M. Vest

Publisher: Wiley-Interscience

Published: 1979

Total Pages: 496

ISBN-13:

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A unified, comprehensive, self-contained treatment of theory, practice, and application, including related coherent optical techniques. Emphasizes quantitative evaluation of holographic interferograms of both opaque and transparent objects, explaining how tools such as the laser and holography are being applied to present-day measurement problems. Applies clear, simple, physical reasoning to present practical information and data; circumvents complicated mathematics wherever possible. Includes over 700 cited references, numerous line drawings and photographs, and several useful tables and equations relating optical data to physical properties.

Whole-Field Experimental Stress Analysis Using Laser Speckle Interferometry

Whole-Field Experimental Stress Analysis Using Laser Speckle Interferometry PDF

Author: Terry L. Vandiver

Publisher:

Published: 1981

Total Pages: 138

ISBN-13:

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The objective of this study was to develop a whole-field experimental stress analysis method for composite structures. A data-gathering system, using the optical technique of laser speckle interferometry, was used to capture deformation of bodies under load on a film record. The speckle interferograms were analyzed by a computer-aided scanning system. A mathematical and geometrical interpretation of interferometric data is presented. The interferograms were analyzed at strategic image points on the test specimens to obtain displacement data which was used to calculate strains, shearing strains, and correlated with shearing stresses. Anisotropic elastic constants such as Young's modulus, shear modulus, and Poisson's ratio were calculated. A full-field aperture analysis was used as a tool to qualitatively observe the free edge effects of shear specimens. The techniques presented in this report are significant because full-field or discrete information can be obtained from any point rather than averaging data from a small region. (Author).

Holographic Nondestructive Testing

Holographic Nondestructive Testing PDF

Author: Robert Erf

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 461

ISBN-13: 0323149502

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Holographic Nondestructive Testing presents a unified discussion of the principles and methods of holography and its application holographic nondestructive testing. The book discusses in detail the basic theoretical concepts, the experimental methods for recording holograms, and different specialized holographic techniques. Several kinds of holography are discussed in the beginning chapters such as continuous-wave holography, pulsed holography, and interferometric holography. Other topics covered in the book are holographic surface contouring, holographic correlation, and holographic vibration analysis. Microwave and acoustical holography are the major areas of interest in Chapters 9 and 10. The text serves as an important reference to both engineers and optical scientists.

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