Summary Unit 5

Summary Unit 5

1. Structures

   • Mass structures
   • Frame structures
   • Truss structures
   • Suspended structures

2. Stresses, forces and strench

   • Compression
   • Tension or Traction
   • Bending
   • Torsion
   • Shear

3. Conditions for strong structures

   • Rigity
   • Equilibrity
   • Stability
     • Centre of gravity
     • Stable

4. Elements that increase rigidity

   • Trussing
   • A brace
   • Stay cables
   • Sections

5. Machines

   • Driver elements
   • Driven elements
   • Converting and transmition elements
   • Tipes of motion
     • Linear motion
     • Rotary motion
     • Reciprocating motion
     • Oscilating motion

6. Mechanisms

   • Motion transmission
     • Linear transmition
       • Levers
         • Class 1
         • Class 2
         • Class 3
         • E*A=R*A
       • Pulleys
         • Fixed
         • Moveable
     • Rotary transmition
       • Friction wheels
       • Belt and pulley
       • Gears
       • i=w1/w2=d1/d2
       • Worm gear
         • i=z1/z2=1/z1
   • Motion conversion
     • Screw and nut
     • Rack and pinion
     • Crank and slider
     • Cams
     • electric cam
   • Other mechanisms
     • Wedge
     • Ramp
     • Ratchet