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Experimental Stress Analysis

Experimental Stress Analysis. Instructor: Prof. K. Ramesh, Department of Applied Mechanics, IIT Madras. The course covers the basic aspects of experimental stress analysis that includes exhaustive treatment of the most versatile techniques like photoelasticity and strain gauges and also a brief introduction to the emerging techniques like digital image correlation. In addition it also provides the fundamental aspects of six different experimental techniques such as Moire, brittle coatings, holography, speckle methods, thermoelastic stress analysis and caustics. (from nptel.ac.in)

Lecture 21 - Fringe Thinning Methodologies

Concepts covered in this lecture: Fringe thinning methodologies, Thresholding to find fringe areas, Binary based and intensity based algorithms, Chen & Taylor algorithm for one scanning direction, Fringe skeletonisation, Global fringe thinning algorithm, Experimental evaluation, Theoretical reconstruction of fringe pattern, Opening remarks on comments on fringe ordering.


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Overview of Experimental Stress Analysis
Lecture 01 - Overview of Experimental Stress Analysis
Lecture 02 - Optical Methods Work as Optical Computers
Lecture 03 - Stress, Strain and Displacement Fields
Lecture 04 - Physical Principle of Strain Gauges, Photoelasticity and Moire
Lecture 05 - Introduction to Moire, Bridle Coatings and Holography
Lecture 06 - Hologram Interferometry, Speckle Methods
Lecture 07 - Introduction to Shearography, TSA, DIC and Caustics
Lecture 08 - Fringe Patterns - Richness of Qualitative Information
Lecture 09 - Multi-Scale Analysis in Experimental Mechanics
Lecture 10 - Selection of an Experimental Technique
Transmission Photoelasticity
Lecture 11 - Introduction to Transmission Photoelasticity
Lecture 12 - Ordinary and Extraordinary Rays
Lecture 13 - Light Ellipse, Passage of Light through a Crystal Plate
Lecture 14 - Retardation Plates, Stress-Optic Law
Lecture 15 - Plane Polariscope
Lecture 16 - Jones Calculus
Lecture 17 - Circular Polariscope
Lecture 18 - Determination of Photoelastic Parameters at an Arbitrary Point
Lecture 19 - Tardy's Method of Compensation
Lecture 20 - Calibration of Photoelastic Materials
Lecture 21 - Fringe Thinning Methodologies
Lecture 22 - Fringe Ordering in Photoelasticity
Lecture 23 - Miscellaneous Topics in Transmission Photoelasticity
Introduction to Three-dimensional Photoelasticity and Digital Photoelasticity
Lecture 24 - Three-dimensional Photoelasticity
Lecture 25 - Overview of Digital Photoelasticity
Photoelastic Coatings and Brittle Coatings
Lecture 26 - Introduction to Photoelastic Coatings
Lecture 27 - Correction Factors for Photoelastic Coatings
Lecture 28 - Coating Materials, Selection of Coating Thickness, Industrial Application of Photoelastic Coatings
Lecture 29 - Calibration of Photoelastic Coatings, Introduction to Brittle Coatings
Lecture 30 - Analysis of Brittle Coatings
Strain Gauges
Lecture 31 - Introduction to Strain Gauges
Lecture 32 - Temperature Compensation, 2-wire and 3-wire Circuits
Lecture 33 - Strain Gauge Alloys, Carriers and Adhesives
Lecture 34 - Performance of Strain Gauge System
Lecture 35 - Temperature Compensation, Two-wire and Three-Wire Circuits
Lecture 36 - Strain Gauge Selection
Lecture 37 - Bonding of a Strain Gauge
Lecture 38 - Soldering, Accounting for Transverse Sensitivity Effects
Lecture 39 - Correction Factors for Special Applications
Lecture 40 - Special Gauges
Discussion Session
Lecture 41 - Questions and Answers