Question

Considering Fig. 1.21, let us take d₁ = 20 mm, d₂ = 14 mm, d₃ = 10 mm, L₁ = 100 mm, L₂ = 140 mm, L₃ = 150 mm. Forces are P₁ = 30 kN, P₂ = 16kN, P₃ = 20 kN, P₄ = 34 kN. If E = 100 kN/ mm², determine the change in length in each portion and the overall change in length.

Answer 1

P₁ = 30 kN 

P₁ + P₃ = 50 kN 

P₂ = 16kN 

P₂ + P₄ = 50kN