# SIMPLE STRESSES-STRAIN SHORT QUESTION ANSWERSCLASS NOTES

## it is helpful in the design of components.

### 4. What is a tensile stress?

####  Fig. Body under Tensile Load

### 5. Explain a compression stress, its symbol and units.

####  Fig. Body Under Compressive Load

### 8.  What do you understand by 0.2 % proof stress?

####  Fig. Finding Yield Point by Offset Method

Draw a tangent to curve from the origin.

Draw a line parallel to the tangent from 0.2 % strain point . It meets the stress strain curve at point ‘B’. Point B is the proof stress or yield stress.

### 5. Define a shear strain? What is its symbol? What are its units?

#### This strain is an angular strain. This strain is due to a shear stress. Its symbol is γ . Its unit is radian. Shear strain causes distortion. There is no change of size in shear strain. Shear strain has ± sign. It is because of induced and applied shear strains co-exist. These are clockwise and anticlockwise respectively. If the applied shear strain is clockwise, then, induced shear strain is anticlockwise and also vice versa.

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