Mechanical Properties of Solids
Madhya Pradesh Board · Class 11 · Physics
Quick revision notes for Mechanical Properties of Solids — Madhya Pradesh Board Class 11 Physics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Introduction to Elasticity and Plasticity
- Real solids are not perfectly rigid - they can be deformed when sufficient force is applied
- Elasticity: Property by which a body regains its original shape and size when deforming force is removed
- Elastic deformation: Temporary change in shape that is recovered when force is removed
Stress and Strain
- When a body is in static equilibrium under applied forces, it develops internal restoring forces
- Stress = Restoring force per unit area
- Three types of stress: Tensile/Compressive (longitudinal), Shearing (tangential), Hydraulic
Hooke's Law
- For small deformations, stress is directly proportional to strain
- This relationship is known as Hooke's law
- Hooke's law is empirical and valid for most materials within elastic limit
Stress-Strain Curve
- Graph plotted between stress (y-axis) and strain (x-axis) for a material
- Region OA: Linear relationship, Hooke's law obeyed, elastic behavior
- Point A: Proportional limit
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