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Digital Photoelasticity: Advanced Techniques & Applications:

Pages: 410, Price: 198 DM/US$116

The principal objectives of the book are to provide an introduction to basic concepts and methodologies for digital photoelasticity and to develop a foundation on which the future researcher and the student can develop his own new and fruitful ideas and promote research in formulation of problems in digital photoelasticity and application of these techniques to industries. Particular care has been taken to give a clear, straightforward, and simple presentation of the various topics. Exercises designed to support and extend the treatment have been placed at the end of each chapter .

The book is divided into eleven chapters. The first three chapters provide the basics of photoelasticity and digital image processing. Methods for data reduction and the use of computer graphics for theoretical reconstruction of fringe patterns have been additionally covered in Chapter 1. Chapter 3 gives an interesting discussion on the design and principle of operation of CCD cameras and should prove useful to researchers working in digital photoelasticity.

Chapters 4-7 give the various methodologies developed for data acquisition in digital photoelasticity exhaustively. Chapter 4 deals with techniques related to fringe multiplication, fringe thinning and fringe clustering through data acquisition by modern techniques such as DIP methods. Chapter 5 deals with the whole-field extraction of photoelastic data based on direct processing of the intensity recorded with minimal operator intervention in interpreting photoelastic data. Techniques such as phase shifting, polarization stepping and Fourier transform techniques are discussed in this chapter. Chapter 6 deals with phase unwrapping and optical enhanced tiling, while Chapter 7 deals with the use of colour image processing techniques for data acquisition in digital photoelasticity. Methodologies of three-fringe photoelasticity, phase shifting in colour domain, polarization stepping in colour domain, spectral content analysis and tricolour photoelastic method are discussed in this chapter.

Chapters 8-11 deal with the application of these methodologies and summarise the recent trends and future possibilities of digital photoelasticity. Chapter 8 provides synthesis of data acquisition by digital techniques, statistical methods for data interpretation and finally verification of the experimental results through computer graphics. Chapter 9 deals with a comprehensive review of the techniques for stress separation. Chapter 10 deals with the early initiatives on the stress analysis of RP models by photoelasticity.Chapter 11 initially deals with the extension of digital techniques developed for 2-D transmission photoelastic analysis to other branches of photoelasticity such as integrated photoelasticity and scattered photoelasticity. The recent developments in DIP hardware and software, particularly the need for developing a device independent software for digital photoelasticity are then indicated.

A very useful and interesting part of the book is the source code of computer software related to the different techniques discussed in the book. The designers and consultants can easily adopt these techniques by using the source codes provided in the accompanying CD.The contents of the book (though not the entire book) can be covered in a one semester course on digital photoelasticity. Parts of the book can also form part of courses on Experimental Stress Analysis and Fracture Mechanics.

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