CHAPTER 6

Levers

Chapter Objectives

  1. Design a hand- or foot-operated lever depending upon the amount of force to be exerted and the amount of weight to be lifted.

  2. Calculate the effort arm length on the basis of the amount of effort applied and the principle of equilibrium of moments, when the load arm length, and the load to be lifted or, the force to be exerted, are given.

  3. Determine the maximum bending moment and/or the twisting moment on the critical section of a lever.

  4. Calculate the dimensions of a lever section using allowable bending and shear stresses.

  5. Calculate the maximum bending moment and twisting moment on shaft or pin.

  6. Determine the diameter and length of the shaft, and the diameter of the hub on the lever from the equivalent ...

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