Answer:
The diameter of the shaft is 80.5 mm.
Explanation:
Torsion equation is applied for the diameter of the solid shaft.
Step1
Given:
Power of the shaft is 100 kw.
Revolution per minute is 160 RPM.
Allowable shear stress is 70 Mpa.
Maximum torque is 20% more than the mean torque.
Step2
Mean torque is calculated as follows:



T=5968.31 N-m
Step3
Maximum torque is calculated as follows:



T_{max}=7161.97 N-m
Step4
Apply torsional equation for diameter of shaft as follows:



d=0.0805 m
or,
d=80.5 mm
Thus, the diameter of the shaft is 80.5 mm.
Answer:
Optimal aspect ratio = 1
Explanation:
From Chvorinov's Rule,
Where
T = solidification time
c = mold constant
For the riser to have the longest solidification time:
We have: D = h
Therefore,
To have to longest solidification time, D = h
Therefore the best aspect ratio would be,
Answer:
Products created can change society, for better and for the worse
It was damaged in a fire
Answer: Fracture will not occur since Kc (32.2 MPa√m) ∠ KIc (35 MPa√m).
Explanation:
in this question we are asked to determine if an aircraft will fracture for a given fracture toughness.
let us begin,
from the question we have that;
stress = 325 MPa
fracture toughness (KIc) = 35 MPa√m
the max internal crack length = 1.0 m
using the formula;
Y = KIc/σ√(πα) ---------------(1)
solving for Y we have;
Y = 35 (MPa√m) / 250 (MPa) √(π × 2×10⁻3/2m)
Y = 2.50
so to calculate the fracture roughness;
Kc = Y × σ√(πα) = 2.5 × 3.25√(π × 1×10⁻³/2) = 32.2 MPa√m
Kc = 32.2 MPa√m
From our results we can say that fracture will not occur since Kc (32.2 MPa√m) is less than KIc (35 MPa√m) of the material.
cheers i hope this helps!!!!