Question

Calculate the mass (in metric tons) of a blade made of Aluminum, M_{blade}^{Al}M
blade
Al
​ , setting the stress limit equal to fatigue limit of the material, \sigma_0^{Al} = 150 MPaσ
0
Al
​ =150MPa.

Answer 1

Hence the value of M = 2 x (Ao ^flap + A0 ^edge) x 86 x 2700 = M / 1000 in tons.

Explanation:

We need to calculate this first:

• Ao^flap =  81 x 8π x σo^flap x ho^flap x ρ (air) x V  x r^2 x L^3
• σo^flap = 150 x 10^6
• Then calculate Ao^edge
• σo^edge = 150 x 10^6
• Then find the value of M
• M = 2 x (Ao ^flap + A0 ^edge) x 86 x 2700
• Hence the value of M = 2 x (Ao ^flap + A0 ^edge) x 86 x 2700 = M / 1000 in tons.