Value of the maximum shear stress , Mechanical Engineering

Value of the maximum shear stress:

Illustrates that for a given maximum shear stress the minimum diameter needed for a solid circular shaft to transmit P kW at N rpm may be expressed as

d = Constant × ( P/ N )3

What value of the maximum shear stress has been used if the constant equals 84.71, being in millimetre - N units?

Solution

 We know,

P × 103  = 2πNT /60 watts      

T =60 ×103/2πN

= (60 ×103 P /2πN )×1000 N mm

= 3 ×107 (P /πN )  N mm

2307_Value of the maximum shear stress.png

 T =  (π/16) d3 τm

d 3  = 16T /π τm

d 3  = (16T /π τm )× 3 × 107 ×   P = (48 × 107 / π2 τm  ). (P/ N)

∴ d = K ×(  P /N)(1/3)

where,

1324_Value of the maximum shear stress1.png

While   K = 84.71, we get,

84.71 = 368 / (τm )(1/ 3)

∴          (τm)(1/ 3)  = 368 /84.71 = 4.344

∴ τm = 82 N/mm2

Posted Date: 1/21/2013 2:49:57 AM | Location : United States







Related Discussions:- Value of the maximum shear stress , Assignment Help, Ask Question on Value of the maximum shear stress , Get Answer, Expert's Help, Value of the maximum shear stress Discussions

Write discussion on Value of the maximum shear stress
Your posts are moderated
Related Questions

Objectives After studying this section, you should be capable to: known properties that are essential to be present in a material for high temperature applications,

Types of Splitwedge gate arrangement need to understand

Q. Patching touch up stick? Pipe requiring limited coating repair resulting from scars, slivers, holidays, etc. shall be repaired by an OWNER approved patching system. The amou

Draw a single point cutting tool and define its various parts. Also describe the standard anglesof this cutting tool.

Determine the concurrent forces: Four coplanar concurrent forces act at point and keep it at rest. These are mention in Figure. Determine the forces P and Q. Solution

SHIELDED METAL ARC WELDING (SMAW) It also known as Manual Metal Arc Welding (MMAW). The heat required for welding is generated by the electric arc formed between metallic elect

Compute the angular velocity of the wheel: A wheel of 0.5 m radius rolls over a horizontal surface without slipping as illustrated in Figure (a). The velocity of its centre is

Total tension in cable of the elevator: An elevator having weight 5000N is ascending with an acceleration of 3m/sec 2 . During this ascent its operator which is having weig

For a few of the following problems the constant acceleration is due to gravity and will be notated as a = g = 32 ft/sec 2 . 'g' perhaps positive or negative depending on the conte