Axial deflection (∆) of a prismatic bar
∆=PL/AE
Where P = External load applied to the bar
L = length of the bar
A = Area of the bar
E = Modulus of elasticity
Above formula can also be written as
∆=P/(AE/A)=P/K
Where K = Axial stiffness of the bar
AE/L= Flexural stiffness of the bar
AE = Axial rigidity
Deflection of a bar due to self-weight
∆=WL/2AE
∆=γL²/AE
Where, W = Self-weight of the bar
γ = Specific weight of the bar
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