Anna University, Chennai
B.E/B.Tech Degree Examination
Automobile Engineering (AUTO)
AT6302 Mechanics of Machines
University : Anna University, Chennai
Year : Second Year
Department : Automobile Engineering (AUTO)
Semester : 03 (III)
Subject Code : AT6302
Subject Name : Mechanics of Machines
Regulation : 2013
Attachment Type : PDF
Description : AT6302 - Mechanics of Machines - Lecture Notes
A mechanism is a combination of rigid or restraining bodies so shaped and connected that they move upon each other with a definite relative motion. A simple example of this is the slider crank mechanism used in an internal combustion or reciprocating air compressor.
A machine is a mechanism or a collection of mechanisms which transmits force from the source of power to the resistance to be over come, and thus perform a mechanical work.
Plane and Spatial Mechanisms
If all the points of a mechanism move in parallel planes, then it is defined as a plane mechanism. If all the points do not move in parallel planes then it is called spatial mechanism.
A mechanism has been defined as a combination so connected that each moves with respect to each other.A clue to the behaviour lies in in the nature of connections,known as kinetic pairs. The degree of freedom of a kinetic pair is given by the number independent coordinates required to completely specify the relative movement.
A pair is said to be a lower pair when the connection between two elementsis through the area of contact.Its 6 types are :
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