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# Introduction to Mechanical Terms and Material Properties (108)

## Chapter Outline

### Chapter 3 - Introduction to Mechanical Terms and Material Properties (Mechanical and Structural Theory)

- Laws of Motion
- Weight, Mass and Gravity
- Units
- Specific Weight and Density
- Definitions of Common Mechanical Terms
- Friction and Wear
- Work, Power
- Energy
- Engineering Materials: Metals
- Stress and Strain
- Definition of Stress
- Shear Stress and Tensile Stress
- Examples of Stress:
- Simple Tension or Compression
- Pure Shear

- Strain
- Shear Strain
- Elasticity—Definitions and Laws
- Stress-Strain Relationship
- Tensile Strength
- Non-linear Elastic and Anelastic Solid Material
- Non-Elastic (or Plastic) Load-Extension (F/u) Curves
- Torque (T)
- Tangential Acceleration (at )
- The Mass Moment of Inertia (IM)
- Radius of Gyration (rho)
- Mass Moments of Inertia
- The Area Moment of Inertia (IA)
- Relative Stiffness (k) of Structural Members
- Shearing Torques/Twisting Torques
- Torsional Stiffness of an Open Cross-Section