Frames and Machines Mechanical Engineering Notes | EduRev

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Civil Engineering (CE) : Frames and Machines Mechanical Engineering Notes | EduRev

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C3.4 Frames and Machines

Frames are structures that consist of several members connected via pins. They are very similar to trusses, except that some members are multi-force members. Basically it’s a fancy way of saying they are not two-force members (trusses are), because of additional forces acting on it. Here’s an example:

Frames and Machines Mechanical Engineering Notes | EduRevFrames and Machines Mechanical Engineering Notes | EduRev

Machines are basically devices used to transmit forces. A good example is the plier. Notice that the plier consists of two members connected by a pin in the centre:

Frames and Machines Mechanical Engineering Notes | EduRevFrames and Machines Mechanical Engineering Notes | EduRev

In this section, we seek to analyse the forces acting in frames and machines. The main strategy of tackling problems in this section is to:

  1. Separate the frame/machine into its individual members.
  2. Apply the x- and y- action-reaction pairs at the pin joints, and solve for the

A quick example of these steps performed on a plier is shown below:

Frames and Machines Mechanical Engineering Notes | EduRev 

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