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Th Lession Mechanical Properties of Mate

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Objectives

On completion of this section, students will be able to:

• understand the classification of engineering materials based on mechanical properties.

• gain skill on mechanical properties of metals

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Stress Strain Curve

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Unit stress

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Strain =

ngth

Originalle

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Direct Strain

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Shear Strain

• Shear strain is the ratio of deformation to original dimensions. In the case of shear strain, it is the amount of deformation perpendicular to a given line rather than parallel to it.

• In engineering, shear strain is defined as the

tangent of the angle, and is equal to the length of deformation at its maximum divided by the

perpendicular length in the plane of force

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