What is Rankine's constant for cast iron?

Discussion

• yaseer   -Posted on 16 Dec 16
  good explaination
• Sravanthi   -Posted on 25 Nov 15
  - Rankine-Gordon's formula is applicable for both short and long columns.
  
  - Rankine's formula is given as:
  
  R = (σ_c A ) / (1 + α [L_e / K]²)
  
  Here, α is called as Rankine's constant, σc is the crushing stress.
  
  α = σ_c / (π² E)
  
  The value of Rankine's constant for different materials having hinged ends is as follows:
  
  1) Cast iron = (1 / 1600)
  2) Wrought iron = (1 / 9000)
  3) Mild steel = (1 / 7500)
  4) Timber = (1 / 750)
  

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