CE6017 EXPERIMENTAL ANALYSIS OF STRESS L T P C 3 0 0 3
OBJECTIVES:
• To make students aware of various measurement techniques and experimental planning and procedures adopted in laboratory.
UNIT I STRAIN GAUGES 9
Definition of Gauge length, sensitivity and range – Characteristics of an ideal strain gauge – Different types of mechanical strain gauges for use in metal and concrete specimens – Optical strain gauge – Acoustic strain gauge – Pneumatic strain gauge – Merits and demerits.
UNIT II ELECTRICAL STRAIN GAUGES 9
Inductance, capacitance and piezo-electric gauges – Bonded and unbounded resistance gauges and their application in stress analysis – Fixing technique and measurement of strains – Rosettes
– Determination of principal strains using rosettes – Use of Murphy‟s construction for drawing
circle of strains – Mohr‟s stress circle – Analytical solution.
UNIT III PHOTOELASTICITY 9
Principles – Maxwell‟s stress optic law – Plane and circularly polarised light and their use in photo elasticity – Polariscopes – Diffusion type, lense type and reflection type polariscopes – Isochromatics and Isoclinics – Model materials – Calibration methods for finding material fringe value – Model fringe value – Examples of beam flexure and diametrically loaded circular plates.
UNIT IV MODEL ANALYSIS 9
Direct and indirect models – Laws of structural similitude – Choice of scales – Limitation of model studies - Buckingham piktheorem – Dimensional analysis – Model materials – Begg‟s deformeter and its use in model analysis – Simple design of models for direct and indirect model analysis.
UNIT V BRITTLE COATINGS 9
Historical review – Stress Coat – Ceramic coatings – Application – Moire fringe method of stress analysis.
OUTCOMES:
TOTAL: 45 PERIODS
• Students will be able to select the appropriate strain gauges for strain measurements and they have sufficient knowledge in model analysis and predict the behaviour of prototypes.
TEXTBOOKS:
1. T.K.Roy, "Experimental Analysis of Stress and Strains", S.Chand and Company Ltd., New
Delhi, 2000
2. Hetenyi. M., Hand Book of Experimental Stress Analysis, John Wiley and Sons Inc., New
York, 1966
REFERENCES:
1. J.W.Dally and W.F.Riley, "Experimental Stress Analysis", McGraw Hill Book, New York,
1990
2. L.S. Srinath, "Experimental Stress Analysis", Tata-McGraw Hill Book Company, New Delhi,
2001.
3. Sadhu Singh, "Experimental Stress Analysis", Khanna Publishers, New Delhi, 2004.
OBJECTIVES:
• To make students aware of various measurement techniques and experimental planning and procedures adopted in laboratory.
UNIT I STRAIN GAUGES 9
Definition of Gauge length, sensitivity and range – Characteristics of an ideal strain gauge – Different types of mechanical strain gauges for use in metal and concrete specimens – Optical strain gauge – Acoustic strain gauge – Pneumatic strain gauge – Merits and demerits.
UNIT II ELECTRICAL STRAIN GAUGES 9
Inductance, capacitance and piezo-electric gauges – Bonded and unbounded resistance gauges and their application in stress analysis – Fixing technique and measurement of strains – Rosettes
– Determination of principal strains using rosettes – Use of Murphy‟s construction for drawing
circle of strains – Mohr‟s stress circle – Analytical solution.
UNIT III PHOTOELASTICITY 9
Principles – Maxwell‟s stress optic law – Plane and circularly polarised light and their use in photo elasticity – Polariscopes – Diffusion type, lense type and reflection type polariscopes – Isochromatics and Isoclinics – Model materials – Calibration methods for finding material fringe value – Model fringe value – Examples of beam flexure and diametrically loaded circular plates.
UNIT IV MODEL ANALYSIS 9
Direct and indirect models – Laws of structural similitude – Choice of scales – Limitation of model studies - Buckingham piktheorem – Dimensional analysis – Model materials – Begg‟s deformeter and its use in model analysis – Simple design of models for direct and indirect model analysis.
UNIT V BRITTLE COATINGS 9
Historical review – Stress Coat – Ceramic coatings – Application – Moire fringe method of stress analysis.
OUTCOMES:
TOTAL: 45 PERIODS
• Students will be able to select the appropriate strain gauges for strain measurements and they have sufficient knowledge in model analysis and predict the behaviour of prototypes.
TEXTBOOKS:
1. T.K.Roy, "Experimental Analysis of Stress and Strains", S.Chand and Company Ltd., New
Delhi, 2000
2. Hetenyi. M., Hand Book of Experimental Stress Analysis, John Wiley and Sons Inc., New
York, 1966
REFERENCES:
1. J.W.Dally and W.F.Riley, "Experimental Stress Analysis", McGraw Hill Book, New York,
1990
2. L.S. Srinath, "Experimental Stress Analysis", Tata-McGraw Hill Book Company, New Delhi,
2001.
3. Sadhu Singh, "Experimental Stress Analysis", Khanna Publishers, New Delhi, 2004.
