1. Materials Properties and Materials Selection Charts

2. Density Elastic modulus: Young’s modulus (E), Shear modulus (G=E/[2(1+ )]) and Bulk modulus (K=E/[3(1-2 )]); Poisson’s ratio ( ) Yield Strength (  y ) Modulus of Rupture Ultimate Tensile Strength (  u ) Hardness A Quick Review of Major Materials Properties

3. Toughness (G c ) and Fracture Toughness (K c ) Loss Coefficient (  ): measure the capacity for dissipating vibrational energy Fatigue ratio: ratio of the fatigue limit to the yield strength A Quick Review of Major Materials Properties

4. Thermal conductivity, Thermal diffusivity, for transient heat flux Melting temperature, T m and Glass transition temperature, T g A Quick Review of Major Materials Properties

5. Linear thermal-expansion coefficient,  Creep exponent, n; Activation energy, Q; reference stress,  0 ; kinetic factor, A Thermal shock resistance Wear resistance Corrosion rate A Quick Review of Major Materials Properties

6. Materials Selection Charts Usually the performance of a component depends on more than one property Plotting charts of one property vs. the other reveals the correlations between properties and facilitates optimization For most load-bearing components, performance are quantified by a combination of properties (The Performance Indices)

7. Materials Selection Charts Examples of Performance Indices are (E 1/2 /  ) for beam, (  f 2 /E) for spring and (  f /E  ) for thermal shock resistance. The materials property charts provide convenient tool for applying design constraints and optimizing performance indices

8. Materials Selection Charts