06ME761-Experimental Stress Analysis |
PART – A |
UNIT I: |
INTRODUCTION: Mechanical, Optical, Pneumatic, Acoustic strain gauges.
Electrical Resistance Strain Gauges – Gauge factor , types, properties of an
ideal gauge material, backing material, adhesive material, protective coating;
Method of bonding strain gauges, strain gauges lead wire and connections,
semiconductor strain gauges problems.
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UNIT II: |
Strain gauge Circuits, Wheatstone’s bridge, Error due to input impedance
of measuring instrument, temperature compensation, multiple gauge circuits,
calibration of strain measuring system, loadcells, problems.
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UNIT III: |
STRAIN GAUGE ROSETTES: Necessity, analysis, problems.
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UNIT IV: |
NATURE OF LIGHT: Harmonic wave, phase, amplitude, polarization.
Crystal optics: Passage of light through crystalline media, absolute and
relative phase difference, quarter wave plate, half wave plate, production of
plane polarized light and circularly polarized light.
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PART – B |
UNIT V: |
TWO-DIMENSIONAL PHOTO ELASTICITY: Stress optic law, plane
polariscope, isochromatics and isoclinics, circular polariscope, dark and
bright fields arrangements, Isoclinic and Isochromatic fringe order at a point,
methods of compensation separation technique.
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UNIT VI: |
PHOTO ELASTIC ANALYSIS: Calibration of photo elastic model
material, properties of ideal photo elastic material, casting of photo elastic
models, machining, stress relieving, scaling model prototype relation, two
dimensional application, problems.
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UNIT VII: |
BIFRINGENT COATING: Theory, photo elastic data for stress analysis,
reflection polariscope. Moire techniques: Phenomenon, moiré fringe analysis,
geometric approach, displacement approach, moiré techniques for inplane
problems, sign and other of fringes, problems of moiré gratings, moiré fringephotograph
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UNIT VIII: |
Introduction to holography. Introduction to brittle coating technique.
Introduction to computer techniques and fringe analysis.
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REFERENCE |
TEXT BOOKS: |
1. Experimental Stress Analysis, L. S. Srinath, M.R. Raghavan, K.
Lingaiah, G. Gargesh, K. Ramachandara & B. Pant, Tata McGraw
Hill publication 2000.
2. Experimental Stress Analysis, Dally & Riley, Tata McGraw Hill
Publication 2001.
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Reference Books |
1. Analysis of Stress and Strain, A. J. Duraelli, E. A. Phillips and
C.H. Trao McGraw Hill, 1958.
2. Applied Stress Analysis, A. J. Durelli, prentice hall India, 1970.
3. Moire Analysis of Strain, Durelli & parks. 1996.
4. Hand Book of Experimental Mechanics, A. S. Kobayassin (Ed.,)
SEM/ VCH, 2nd edn. 2000.
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