m = 25 kg and the height
2s = 740 mm which is hinged around 0 and which can move in a
vertical plane.
The door should be designed so that it always returns to its
closed position, i.e. θ = 0, regardless of the position
0 <θ ≤ 90 ° it is released. This must be done using a
compression spring which is compressed as the rod slides
through the leading hinge at A when the ventilation door is
opened.
The free spring length is selected so that the spring just starts
to compress when the door starts to open.
c) The designer then dimensions a helical spring with the wire
diameter d = 3.8 mm and
average diameter D = 30 mm. What will be the maximum shear stress
in the spring?
- The Figure Shows A Spring Loaded Ventilation Door With The Mass M 25 Kg And The Height 2s 740 Mm Which Is Hinged Aro 1 (117.07 KiB) Viewed 27 times