two mark questions & answers on shear stress distribution

TWO MARK QUESTIONS & ANSWERS ON SHEAR STRESS DISTRIBUTION 

1. What types of stresses are caused in a beam subjected to a constant shear force?

Vertical and horizontal shear stress.

2. State the main assumptions while deriving the general formula for shear stresses?

1. The material is homogeneous, isotropic and elastic.

2. The modulus of elasticity in tension and compression are same.

3. The shear stress is constant along the beam width.

4. The presence of shear stress does not affect the distribution of bending stress.

3. Define Shear stress distribution.

The variation of shear stress along the depth of the beam is called shear stress distribution.

4. Write down the expression for shear stress distribution in a beam subjected to shear force F. 

5. Write the formula to find the shear stress distribution for a rectangular beam section and sketch the shear stress distribution.

5. What is the ratio of maximum shear stress to the average shear stress for the rectangular section?

qmax = 1.5 × qave

6. Draw the shear stress distribution in the solid circular section.

7. What is the ratio of a maximum shear stress to the average shear stress in the case of solid circular section?

8. Sketch the shear stress distribution in a beam made of hollow circular section.

9. What is the maximum value of shear stress for triangular section?

10. Draw the shear stress distribution in the case of triangular section and where the maximum shear stress occurs.

Maximum shear stress occurs at half of the height of the triangle.

11. Draw the shear stress distribution of I-symmetrical section. 

12. What is the shear stress distribution value of flange portion of the I-section?

where, y - distance of flange portion from N.A.

13. Draw the shear stress distribution in the case of ‘T’ - section.

14. What is the value of maximum shear stress in a rectangular cross section?