Shear strain..10.01.03.145

1. Welcome To My Presentation Rifath Ara Rimi 10.01.03.145 Section: C

2. Presentation Topic Shear Strain (Due to Shear & Torsional Stress)

3. Definition of Strain Strain: The ratio of change in a dimension that takes place with a material under stress. Strain is a measurement of stress.

4. The  Cauchy strain  or  engineering strain  is expressed as the ratio of total deformation to the initial dimension of the material body in which the forces are being applied. The  engineering normal strain  or  engineering extensional strain  or  nominal strain   e  of a material line element or fiber axially loaded is expressed as the change in length Δ L  per unit of the original length  L  of the line element or fibers. The normal strain is positive if the material fibers are stretched and negative if they are compressed. Thus, we have where  is the  engineering normal strain,   is the original length of the fiber and  is the final length of the fiber.

5. Definition of Shear Strain Shear Strain Shear strain is defined as the strain accompanying a shearing action. It is the angle in radian measure through which the body gets distorted when subjected to an external shearing action.

6. Pure shear Pure Shear: Any time an object is deformed, shear occurs. For example, in the top row a block is deformed without changing area. It looks like the only deformation involved is compression and extension. Directions of greatest compression and extension are constant. The major and minor axes of the deforming ellipse remain constant. All other lines rotate.

7. Thank you