SIMPLE STRESSES & STRAINS AND THEIR APPLICATIONS
1.1 INTRODUCTION TO STRESSES AND STRAINS
DEFINITIONS OF: FORCE, MOMENT OF FORCE, ACTIONS AND
REACTIONS, STATICS, STATIC EQUILIBRIUM OF BODIES, MECHANICS,
ENGINEERING MECHANICS – CONDITIONS OF STATIC EQUILIBRIUM –
TYPES OF FORCES ON STRUCTURAL MEMBERS – STUDY OF STRENGTH
OF MATERIAL – MECHANICAL PROPERTIES OF MATERIALS -RIGIDITY,
ELASTICITY, PLASTICITY, COMPRESSIBILITY, HARDNESS, TOUGHNESS,
STIFFNESS, BRITTLENESS, DUCTILITY, MALLEABILITY, CREEP, FATIGUE,
TENACITY, DURABILITY DEFINITIONS OF STRESS AND STRAIN – —
1.2 APPLICATION OF STRESS AND STRAIN IN ENGINEERING
FIELD
BEHAVIOR OF DUCTILE AND BRITTLE MATERIALS UNDER DIRECT LOADS
– LOAD EXTENSION CURVE (OR) STRESS STRAIN CURVE OF A DUCTILE
MATERIAL – LIMIT OF PROPORTIONALITY, ELASTIC LIMIT, YIELD STRESS,
ULTIMATE STRESS, BREAKING STRESS, ACTUAL / NOMINAL STRESSES
– WORKING STRESS – FACTOR OF SAFETY – PERCENTAGE ELONGATION
– PERCENTAGE REDUCTION IN AREA – SIGNIFICANCE OF PERCENTAGE
ELONGATION AND REDUCTION IN AREA OF CROSS SECTION –
DEFORMATION OF PRISMATIC AND STEPPED BARS DUE TO UNIAXIAL
LOAD – DEFORMATION OF PRISMATIC BARS DUE TO ITS SELF – WEIGHT
– NUMERICAL PROBLEMS. COMPOSITE SECTIONS –