Civil Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 1)
1.
A rectangular bar of width b and height h is being used as a cantilever. The loading is in a plane parallel to the side b. The section modulus is
none of these.
Discussion:
45 comments Page 3 of 5.
Priya said:
8 years ago
Please explain that when section modulus bh2/6?
Aaron said:
8 years ago
How y=b/2?
RIYAS said:
8 years ago
Section modulus is the ratio of MOI of N.A & Distance from NA from the extreme stressed fibre.
Here NA plays the main role. The load applied in the face of Length x depth. This face elongated & opposite face compressed. So, NA will lie in between this. That means NA will pass perpendicular to width. so MOI will be b^3.d/12.
Distance from n.a. to extreme stressed fibre is b/2.
Here NA plays the main role. The load applied in the face of Length x depth. This face elongated & opposite face compressed. So, NA will lie in between this. That means NA will pass perpendicular to width. so MOI will be b^3.d/12.
Distance from n.a. to extreme stressed fibre is b/2.
(1)
Jeldi said:
8 years ago
In general terms b= width and d or h = depth or height respectively. When loading is applied we consider bd^3/12 (hear loading is parallel to depth) and y=d/2.
Hear in this problem,
Parallel to width is asked making it shifting terms from width as depth (assume that u have rotated your beam)
So hear instead of bd^3 /12 and y=d/2.
V get db^3/12 and y= b/2.
Making Z=I/Y as db^2/6.
Hear in this problem,
Parallel to width is asked making it shifting terms from width as depth (assume that u have rotated your beam)
So hear instead of bd^3 /12 and y=d/2.
V get db^3/12 and y= b/2.
Making Z=I/Y as db^2/6.
(2)
Star Guy said:
8 years ago
Thanks for explaining in an uderstandable manner @Riyas.
James said:
7 years ago
The correct Answer must be (bd3/12)/(d/2) which means bd2/6.
Subrata pal said:
7 years ago
Thanks for all the given explanation.
Loki said:
7 years ago
Loading is parallel to side b then neural axis is perpendicular to side b, I about n.a ( n.a is the axis parallel to bending direction by right-hand thumb rule ) when the plane of loading is symmetry.
Avi said:
7 years ago
I think, option B is correct.
ELIAS said:
6 years ago
Thank all.
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