Answer:
a) The number of cycles of operation at 225 MPa is 184,100 cycles
b) The number of cycles of operation at 225 MPa is 33,600 cycles
Explanation:
Answer:
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Explanation:
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Explanation:
find the initial specific volume
![v_{1} =V_{1} /m=2.4264ft^3/1lbm=2.4264ft^3/lbm](https://tex.z-dn.net/?f=v_%7B1%7D%20%3DV_%7B1%7D%20%2Fm%3D2.4264ft%5E3%2F1lbm%3D2.4264ft%5E3%2Flbm)
To find pressure
![T_{1} =600F , v_{1} =2.4264ft^3/lbm\\so\\P_{1} =P_{2} =250psia](https://tex.z-dn.net/?f=T_%7B1%7D%20%3D600F%20%2C%20v_%7B1%7D%20%3D2.4264ft%5E3%2Flbm%5C%5Cso%5C%5CP_%7B1%7D%20%3DP_%7B2%7D%20%3D250psia)
Answer:
0.39 nM
Explanation:
The critical crack tip radius from the equation
attached below
for fracture to occur the бm will have to reach the fracture strength of material
i.e. бm = E/10
from equation 2 attached below
St = ( 400 * a * бo^2 ) / E^2 ------ 3
Given <em>: a = 2*10^-3 mm , бo = 275 MPa, E = 393 * 10^3 MPa ( gotten from table)</em>
Input given values into equation 3
St = 3.9 * 10^-7 ≈ 0.39 nM