1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aliina [53]
3 years ago
13

The electric motor exerts a torque of 800 N·m on the steel shaft ABCD when it is rotating at a constant speed. Design specificat

ions require that the diameter of the shaft be uniform from A to D and that the angle of twist between A and D not exceed 1.45°. Knowing that τmax ≤ 60 MPa and G = 77.2 GPa, determine the minimum diameter shaft that can be used. (Round the final answer to one decimal place.)

Engineering
2 answers:
Tamiku [17]3 years ago
8 0

The image of this electric motor with its shaft is missing. I have attached it.

Answer:

Minimum Diameter = 40.8 mm

Explanation:

From the question,

Torque(T) = 800 N·m

φ = 1.45° = 1.45π/180 = 0.0253 rads

τ = 60 MPa = 60 x 10^(6) Pa

G = 77.2 GPa = 77.2 x 10^(9) Pa

From the image attached, length of shaft (L) = 0.4 + 0.6 + 0.3 = 1.3m

Now, the polar moment of inertia is calculated from,

J = πc⁴/2 where c is the radius of shaft

To solve this, we will find the diameter based on the angle of twist and also based on the shear stress and we will choose the smaller one.

Based on angle of twist;

Formula for angle twist is given as;

φ = TL/GJ

Now J = πc⁴/2

Thus, φ = 2TL/G(πc⁴)

c⁴ = 2TL/φGπ

c⁴ = [2 x 800 x 1.3]/(0.0253) x 77.2 x 10^(9) x π)

c⁴ = 0.00000033898

c = ∜0.00000033898

c = 0.024m

Now based on shear stress;

Formula for shear stress is given as;

τ = Tc/J

Putting πc⁴/2 for J, we have;

τ = 2T/πc³

c = ∛(2T/πτ)

c = ∛(2 x 800)/(π x 60 x 10^(6))

c = ∛0.00000848826

c = 0.0204m

So, comparing the two values of radius gotten, the one based on the shear stress is bigger and it's c = 0.0204m

Diameter = 2 x radius = 2 x 0.0204m = 0.0408m which is 40.8 mm

kodGreya [7K]3 years ago
3 0

Answer:

d= 4.079m ≈ 4.1m

Explanation:

calculate the shaft diameter from the torque,    \frac{τ}{r} = \frac{T}{J} = \frac{C . ∅}{l}

Where, τ = Torsional stress induced at the outer surface of the shaft (Maximum Shear stress).

r = Radius of the shaft.

T = Twisting Moment or Torque.

J = Polar moment of inertia.

C = Modulus of rigidity for the shaft material.

l = Length of the shaft.

θ = Angle of twist in radians on a length.  

Maximum Torque, ζ= τ ×  \frac{ π}{16} × d³

τ= 60 MPa

ζ= 800 N·m

800 = 60 ×  \frac{ π}{16} × d³

800= 11.78 ×  d³

d³= 800 ÷ 11.78

d³= 67.9

d= \sqrt[3]{} 67.9

d= 4.079m ≈ 4.1m

You might be interested in
For installations where the nonlinear load is huge, most consulting engineers will specify ____-rated transformers.
Scorpion4ik [409]

Answer:

K

Explanation:

For installations where the nonlinear load is huge, most consulting engineers will specify K-rated transformers.

8 0
2 years ago
What steps might one take to make a decision or solve a problem
marusya05 [52]

you must think and plan out what you want to do

8 0
3 years ago
Read 2 more answers
What is flow energy? Do fluids at rest possess any flow energy?
anzhelika [568]

Answer:

Flow energy is defined as, flow energy is the energy needed to push fluids into control volume and it is the amount of work done required to push the entire fluid. It is also known as flow work. Flow energy is not the fundamental quantities like potential and kinetic energy.

Fluid at state of rest do not possess any flow energy. It is mostly converted into internal energy as, rising in the fluid temperature.

8 0
3 years ago
Consider the following grooves, each of width W, that have been machined from a solid block of material. (a) For each case obtai
kogti [31]

Answer:A certain vehicle loses 3.5% of its value each year. If the vehicle has an initial value of $11,168, construct a model that represents the value of the vehicle after a certain number of years. Use your model to compute the value of the vehicle at the end of 6 years.

Explanation:

8 0
3 years ago
Shows a closed tank holding air and oil to which is connected a U-tube mercury manometer and a pressure gage. Determine the read
damaskus [11]

Answer:

P_2-P_1=27209h

Explanation:

For pressure gage we can determine this by saying:

The closed tank with oil and air has a pressure of P₁ and the pressure of oil at a certain height in the U-tube on mercury is p₁gh₁. The pressure of mercury on the air in pressure gauge is p₂gh₂. The pressure of the gage is P₂.

P_1+p_1gh_1=p_2_gh_2+P_2

We want to work out P₁-P₂: Heights aren't given so we can solve it in terms of height: assuming h₁=h₂=h

P_1-P_2=p_1gh_1-p_2gh_2=(55)\cdot{32.2}h-845\cdot{32.2}h

P_2-P_1=27209h

3 0
3 years ago
Other questions:
  • The flowchart below shows the design steps required to build a working model.
    6·1 answer
  • Define the difference between elastic and plastic deformation in terms of the effect on the crystal lattice structure.
    5·1 answer
  • Thermal energy storage systems commonly involve a packed bed of solid spheres, through which a hot gas flows if the system is be
    13·1 answer
  • What are the weight restrictions for a small UAS, including everything onboard at the time
    12·1 answer
  • Finally you will implement the full Pegasos algorithm. You will be given the same feature matrix and labels array as you were gi
    12·1 answer
  • Parallel circuits???
    9·1 answer
  • A cubic transmission casing whose side length is 25cm receives an input from the engine at a rate of 350 hp. If the vehicle's ve
    5·1 answer
  • Engine blocks are made by using a manufacturing process called​
    12·1 answer
  • Stress that acts in the plane of a cut section, rather than at right angles to the section is called:_______
    6·1 answer
  • At least 1 sources must be from an organization website (.org) and 1 source must be from and educational website .edu) Do not us
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!