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The objectives of this video are to discuss engineering strain followed by a brief workout on finding strain in a given exemplary column. Basically, the engineering strain can be defined as the ratio of change in length to the initial length of a member. Moving on, the video talks about the expression & notation used to represent strain. The video, then, elaborates the fact that why engineering strain is a dimensionless quantity. Moving on, the video presents an example where the strain & length of a column have been given and it has asked to find the length contraction when subjected to axial load.
The video uses the introduced formula of strain & successively calculates down the value of length contraction when the column is subjected to axial load using the data available. The video, in its last part, briefly talks about the necessity of strain calculations in engineering designs to best reflects in meeting the physical demands. Finally, the video refers to watch next video tutorials to get in touch with the Hooke’s law and ways of relating stress and strain.
Mechanics, the study of forces and physical bodies, underpins a very large proportion of all forms of engineering. A thorough understanding of mechanics is essential to any successful engineer. This course helps develop an understanding of the nature of forces with consideration for how they may be simplified in an engineering context. The conditions of equilibrium are then used to solve a number of problems in 2D and 3D before moving on to a broad range of topics including centroids, distributed loads, friction and virtual work. The course will also provide an introduction to dynamics, with a particular focus on the effects that forces have upon motion.