Th Lession Mechanical Properties of Mate

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

Stress Strain Curve

Unit stress

•

_{Strain =}

ngth

Originalle

Direct Strain

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