A torsion-bar spring consists of a prismatic bar, usually of round cross section, that is twisted at one end and held fast at the other to form a stiff spring. An engineer needs a stiffer one than usual and so considers building in both ends and applying the torque somewhere in the central portion of the span, as shown in the figure. This effectively creates two springs in parallel.
The engineer is forced by geometric considerations to apply the torque on the spring at the location x = 0.37l. For a uniform-diameter spring, this would cause one leg of the span to be underutilized when both legs have the same diameter. For optimal design the diameter of each leg should be designed such that the maximum shear stress in each leg is the same Using x = 0.37l, l=10 in, T=1,500 lbf. in, and G = 10.4 Mpsi, design the spring such that the maximum shear stresses in each leg are equal and the spring will have the same spring rate (angle of twist) as a uniform-diameter bar with T=1,500 lbf in, x=1/2-5 in, and d1=d2=0.5
Find the required diameters of each leg:
d1
d2
Answers: 2
Physics, 21.06.2019 23:30
The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of
Answers: 1
Physics, 22.06.2019 06:40
Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?
Answers: 2
Physics, 22.06.2019 09:20
Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers
Answers: 1
A torsion-bar spring consists of a prismatic bar, usually of round cross section, that is twisted at...
Computers and Technology, 15.02.2021 21:00
Mathematics, 15.02.2021 21:00
History, 15.02.2021 21:00
Computers and Technology, 15.02.2021 21:00
Mathematics, 15.02.2021 21:00
Mathematics, 15.02.2021 21:00