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Materials Properties and Materials Selection Charts. A Quick Review of Major Materials Properties. 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

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a quick review of major materials properties
A Quick Review of Major Materials Properties
  • 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 properties1
A Quick Review of Major Materials Properties
  • Toughness (Gc) and Fracture Toughness (Kc)
  • 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 properties2
A Quick Review of Major Materials Properties
  • Thermal conductivity, 
  • Thermal diffusivity, for transient heat flux
  • Melting temperature, Tm and Glass transition temperature, Tg
a quick review of major materials properties3
A Quick Review of Major Materials Properties
  • Linear thermal-expansion coefficient, 
  • Creep exponent, n; Activation energy, Q; reference stress, 0; kinetic factor, A
  • Thermal shock resistance
  • Wear resistance
  • Corrosion rate
materials selection charts
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)
materials selection charts1
Materials Selection Charts
  • Examples of Performance Indices are (E1/2/) for beam, (f2/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