Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 2 (Q.No. 40)
40.
When a cantilever beam is loaded at its free end, the maximum compressive stress shall develop at
bottom fibre
top fibre
neutral axis
centre of gravity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

MUHAMMAD NABI said:   3 years ago
Option B (top fibre) is the correct option.

Stress = resisting force per unit area.

As there will tension in upper zone of contilever beam so the resisting force will be compressive stresses.
(1)

Shaym said:   6 years ago
If point load is there. Then beam will deflect downward and the upper layer will get elongated. And the bottom layer will be contracted so by the definition of stress. = stress is the internal resisting force. So compressive stress will be in the upper layer. Please explain if I am wrong.
(1)

Arun kumar said:   9 years ago
Load is not given correctly. If it is bending load, imagine a cantilever with point load acting downwards at its free end and imagine its deflection too. The top most fibre experiences maximum tensile stress and the bottom have most compressive stress.

Akshay said:   9 years ago
How? Explain.

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