JNTUK B.Tech Experimental Stress Analysis gives you detail information of Experimental Stress Analysis R13 syllabus It will be help full to understand you complete curriculum of the year.
Course objectives
Objective of the course is to measure strain through various experimental methods like strain gauges, photo elasticity techniques, brittle coatings, moiré methods and birefrigerent coatings to understand the relation between the mechanics theory and experimental stress analysis to learn usage of the experimental techniques on the practical problems
UNIT – I : Introduction: Stress, strain, Plane stress and plane strain conditions, Compatibility conditions. Problems using plane stress and plane strain conditions, stress functions, mohrs circle for stress strain, Three-dimensional stress strain relations.
UNIT – II : Strain Measurement and Recordings: Various types of strain gauges, Electrical Resistance strain gauges, semiconductor strain gauges, strain gauge circuits. Introduction, static recording and data logging, dynamic recording at very low frequencies, dynamic recording at intermediate frequencies, dynamic recording at high frequencies, dynamic recording at very high frequencies, telemetry systems.
UNIT – III : Photo elasticity: Photo elasticity – Polariscope – Plane and circularly polarized light, Bright and dark field setups, Photo elastic materials – Isochromatic fringes – Isoclinics
Three dimensional Photo elasticity : Introduction, locking in model deformation, materials for three-dimensional photo elasticity, machining cementing and slicing three-dimensional models, slicing the model and interpretation of the resulting fringe patterns, effective stresses, the shear- difference method in three dimensions, applications of the Frozen-stress method, the scattered-light method.
UNIT – IV : Brittle coatings: Introduction, coating stresses, failure theories, brittle coating crack patterns, crack detection, ceramic based brittle coatings, resin based brittle coatings, test procedures for brittle coatings analysis, calibration procedures, analysis of brittle coating data.
UNIT – V : Moire Methods: Introduction, mechanism of formation of Moire fringes, the geometrical approach to Moire-Fringe analysis, the displacement field approach to Moire-Fringe analysis, out of plane displacement measurements, out of plane slope measurements, sharpening and multiplication of Moire- Fringes, experimental procedure and techniques.
UNIT – VI : Birefringent Coatings : Introduction, Coating stresses and strains, coating sensitivity, coating materials, application of coatings, effects of coating thickness, Fringe-order determinations in coatings, stress separation methods.
TEXT BOOKS
- Theory of Elasticity by Timoshenke and Goodier Jr.
- Experimental stress analysis by Dally and Riley, Mc Graw-Hill.
REFERENCES
- A treatise on Mathematical theory of Elasticity by LOVE .A.H.
- Photo Elasticity by Frocht.
- Experimental stress analysis, Video course by K.Ramesh / NPTEL.
Course Outcomes
The intended learning outcomes are that on completion of this course the student should be able to:
- Student should be able to chose the appropriate method for measuring strain of strain & stress.
- Analyze the results obtained from coating techniques and corroborated with theoretical results.
- Correlate experimental and analytically derived results.
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