Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 3)
3.
The neutral axis of the cross-section a beam is that axis at which the bending stress is
Discussion:
41 comments Page 1 of 5.
Jide said:
1 decade ago
Depending on the material used (if elastic), when bending a beam, one surface eventually stretches due to tension while the surface opposite compresses without damaging or breaking the beam due to the fact that the proportional limit is not exceeded which implies that, there exist a neutral axis or zero stress.
Shrishiva said:
7 months ago
A neutral axis is an imaginary axis above which the surface experiences tensile force and below the surface undergoes compression, whereas the neutral axis does not experience any force (the above condition is followed when the load is given from an upward direction).
Gebremedhin said:
9 years ago
Due to Hooke's Law, the stress in the beam is proportional to the strain by E, the modulus of Elasticity.
Therefore, from statics a moment (i.e. pure bending) consists of equal and opposite forces. So, the total amount of force across the cross section must be 0.
Therefore, from statics a moment (i.e. pure bending) consists of equal and opposite forces. So, the total amount of force across the cross section must be 0.
Ankit patel said:
9 years ago
Assume that horizontal beam is subjected to bending stress, due to load P (downward).
Bending is occur in downward direction.
From neutral axis upper part in tensile stress and lower part is in compressive stress but at neutral axis it.
Must become zero.
Bending is occur in downward direction.
From neutral axis upper part in tensile stress and lower part is in compressive stress but at neutral axis it.
Must become zero.
Chinna said:
1 decade ago
Neutral axis is the line interaction with neutral layer with transverse axis. In above neutral axis the layers are compressed and below the layers are tensed. There is no load acting on neutral axis. So bending moment on the neutral axis is zero.
Krishna singh chaturvedi said:
8 years ago
In loded beam the situation comes when stress goes either tension to compression or compression to tension. And the point comes when sum is equal to zero, if consider for whole line, so tht line would be as neutral axis.
Mytharprasanth said:
6 years ago
Initially, no load will be acting in a Cross-section of the beam.
So, bending moment on the axis of the beam.
And, it will be zero.
the intial load is zero, and there is no force act itself.
So, bending moment on the axis of the beam.
And, it will be zero.
the intial load is zero, and there is no force act itself.
(1)
Ranganatha kamati said:
8 years ago
The nuetral axis is an axis in the cross section of beam (a member resisting bending) and is geometrically centroid, because the bending stresses acting on an nuetral axis is zero.
GUNTURU said:
1 decade ago
The bending stress is zero at that point distance is zero hence bending moment is not possible for equation MY/I=BENDING STRESS FOR THIS CASE Y=0 HENCE BENDING STRESS IS ZERO.
Mpv ramesh said:
6 years ago
The neutral axis is an imaginary line even the beam bending concave shape the neutral axis is all ways a straight line so the bending stress is zero at the neutral axis.
(10)
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