The point of contraflexure in a beam is at the location where the -

Dnyan Deshmukh

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Staff member
Sep 7, 2017
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Pune
#1
The point of contraflexure in a beam is at the location where the -

(a) Deflection changes sign

(b) Beam develops crack

(c) Radius of curvature changes sign

(d) Shear force is maximum.

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Feb 23, 2018
3
0
mumbai
#4
The point of contraflexure in a beam is at the location where the -

(a) Deflection changes sign

(b) Beam develops crack

(c) Radius of curvature changes sign

(d) Shear force is maximum.

Do reply with your answer and if possible add some description to your answer.

Once you reply, you can see the correct answer of the question, its really a fun game and learning.

[Hidden Content]
Am not sure abt the answer I think it's (a)
 
Feb 23, 2018
3
0
mumbai
#5
The point of contraflexure in a beam is at the location where the -

(a) Deflection changes sign

(b) Beam develops crack

(c) Radius of curvature changes sign

(d) Shear force is maximum.

Do reply with your answer and if possible add some description to your answer.

Once you reply, you can see the correct answer of the question, its really a fun game and learning.

[Hidden Content]
Ohh thanks for answering..
 
Mar 15, 2018
2
1
Trichy
#6
The point of contraflexure in a beam is at the location where the -

(a) Deflection changes sign

(b) Beam develops crack

(c) Radius of curvature changes sign

(d) Shear force is maximum.

Do reply with your answer and if possible add some description to your answer.

Once you reply, you can see the correct answer of the question, its really a fun game and learning.

[Hidden Content]
Shear force is maximum
 
Sep 26, 2017
3
6
TRICHY
#8
According to my thought

when deflection changes it's sign in beam / radius of curvature changes it's sign in beam / shear force is in maximum at beam.
in all the above cases point of contraflexure will be occur.

but when a beam develops a crack the point of contraflexure is may be/may not be occur cause when a beam develops a crack Bending moment diagram will be the same but stress distribution at the cross section of the beam will be changed, but in statically indetermined system the reactions can be changed
its depends on what the location of the load/bending moment in the cross section of the beam
so the answer is may be/may not be cause the effect of the presences of crack only on the distribution of the stress in beam.

if my thought is wrong kindly inform me with correct thought