Strain_and_deformation - 1 Strain and deformation Strain...

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Unformatted text preview: 1 Strain and deformation Strain and deformation MECH 320-Mechanic of materials MECH 320-Mechanic of materials Prepared By: Nasser-Eddin M., Ph.D Prepared By: Nasser-Eddin M., Ph.D 2 Table of Contents Table of Contents Displacements Rigid Body vs Deformation Normal & Shear Strain Experimental Mohr's Circle 3 Displacement Displacement Whether we know it or not we are all intuitively familiar with the concept of displacement . Every time you move from one place to another your entire body is experiencing a displacement. Wiggle your finger; watch it displace. When we use the word displacement in a technical context there is also an associated technical definition. This technical definition may be boiled down to: A DISPLACEMENT is a vector quantity used to measure movement of a point in an object from one location to the next. 4 Rigid body vs Deformation For engineering purposes, we distinguish between two types of displacements. They are rigid body displacements and deformations . To demonstrate rigid body motion, imagine that you are speeding down the Highway on your way to Tripoli. The car is experiencing displacement, but it is not changing shape. We say that the car is traveling as a " but it is not changing shape....
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This note was uploaded on 02/07/2011 for the course MECH 320 taught by Professor D.a during the Spring '09 term at American University of Beirut.

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Strain_and_deformation - 1 Strain and deformation Strain...

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