Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 2 (Q.No. 10)
10.
The point of contraflexure occurs in
cantilever beams
simply supported beams
overhanging beams
fixed beams
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 1 of 3.

S.B said:   4 years ago
It is a point in the bending moment diagram at which the bending moment changes its sign from negative to positive or vice versa. It occurs mainly in overhanging beam in which there is opposite magnitude moment acting on another side of overhanging part which makes the net moment to change its sign, by virtue of this the point of contraflexure came into picture. But it is not always in overhanging beam it can also occur in simply supported beam and fixed beams.
(1)

Harish said:   10 years ago
In overhanging beam case, one or both of its ends freely extended over the supports. The loading's are applied at the ends. The maximum stress is located at the center.

When we compared with above options we will get least bending stress in overhanging beams.

Hitesh said:   7 years ago
Generally, point of contraflexure occurs in overhanging beams. But it also occurs in fixed beams in few cases. If both are mentioned in the ques, we must go with the overhanging one.
(1)

Salahuddin said:   2 years ago
For a fixed beam there always exist points where BM changes sign.

But for an overhanging beam, it is not necessary that always a point of contra flexure occurs.
(5)

Silence said:   5 years ago
Point of contra-flexure can occur in overhanging and fixed beam both, then why overhanging is taken as the correct answer? why not both as correct answer?

Bhushan said:   7 years ago
C is correct. Other beams may not have point of contraflexure, but overhanging beam always does.
(1)

N mukherjee said:   6 years ago
Is there any case of point of contraflexure in simply supported or cantilever beam?

Syed mahroz said:   4 years ago
It also occurs in simply supported beam when concentrated moment act on centre.
(2)

Pradeep gk said:   7 years ago
OHB.

Because beam extends beyond the point so bending moment change the sign.

Anand said:   7 years ago
It occurs in all types of beam, hence answer should be all of these.


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