Mechanical Properties of Solids
Telangana Open School (TOSS) · Class 12 · Physics
Complete topic list for Mechanical Properties of Solids in Telangana Open School (TOSS) Class 12 Physics. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Mechanical Properties of Solids
Elasticity and Plasticity
- Elasticity is the ability of a body to regain its original shape and size after removal of deforming force.
- Plasticity is the property of a body to retain its deformed shape permanently.
- No material is perfectly elastic or perfectly plastic; real materials lie between these extremes.
Stress and Strain
- Stress is the internal restoring force per unit area of cross-section.
- Strain is the ratio of change in dimension to original dimension; it has no units.
- Three types of stress: Longitudinal (tensile/compressive), Normal (volume), and Shearing.
Stress-Strain Curve and Hooke's Law
- Stress-strain graph shows how a material behaves under increasing load.
- Region OA: Proportional limit — stress ∝ strain (Hooke’s Law).
- Point B: Elastic limit — beyond this, permanent deformation occurs.
Moduli of Elasticity
- Three moduli correspond to three types of strain.
- Young’s Modulus (Y): Ratio of longitudinal stress to linear strain.
- Bulk Modulus (B): Ratio of normal stress to volume strain.
Key Concepts
Central concept: Elasticity
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