Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 8)
8.
Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m. The shaft 'B' has the greater diameter.
Discussion:
52 comments Page 5 of 6.
Singaravelan said:
8 years ago
Torque means?
Ranjit chavan said:
8 years ago
P=2 * 3.14 * N * T/60.
Where T=p * R/2.
i.e. 'p' is directly proportional to R.
Where T=p * R/2.
i.e. 'p' is directly proportional to R.
Kishan P said:
8 years ago
As Rpm increasing, torque in reduces. As torque reduce the maximum shear stress at the outer most fibre will reduce.
As it's having less shear stress, it required smaller diameter.
Hence when Rpm increasing, the diameter will be smaller When compared to a member having lower Rpm.
As it's having less shear stress, it required smaller diameter.
Hence when Rpm increasing, the diameter will be smaller When compared to a member having lower Rpm.
Govind kumar said:
8 years ago
If dia of shaft is small then it's rotation is more than the larger dia of shaft.
Kartik Uttarkar said:
8 years ago
If the RPM is increasing then diameter value should be small but not big. And vice-versa if the RPM value is decreasing then it should have bigger diameter.
(1)
BRIJ MOHAN VERMA said:
7 years ago
Diameter of a shaft in any power transmission is directly proportional to shaft speed.
(1)
Harshal Dongre said:
7 years ago
P=(2*π*N*T/60).
So for same power, NT=Constant.
Therefore for less rpm more torque is transferred, so greater the torque greater is the diameter.
So for same power, NT=Constant.
Therefore for less rpm more torque is transferred, so greater the torque greater is the diameter.
(7)
Muswar_SIYAL said:
7 years ago
Here the term "Two shafts ' is used.
Not Two Pulleys, so that I think no relation.
Not Two Pulleys, so that I think no relation.
(2)
Bhargav Panchal said:
7 years ago
v = π * D * N/60.
From this v is proportional to diameter and N both. So, I think the statement is true.
From this v is proportional to diameter and N both. So, I think the statement is true.
(1)
Rajneesh singraul said:
7 years ago
Shaft rpm can not determine by diameter. It Can be determined by hollow shaft and solid shaft.
(8)
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