Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Determine number of coils and length of the spring:
A close coiled helical spring ought to extend by 120 mm under an axial force of 1200 N. If mean coil radius is equal to 40 mm and maximum shear stress is 300 MPa, determine the wire diameter, number of coils and length of the spring. Take G = 80 GPa.
Solution
Δ = 120 mm, W = 1200 N, R = 40 mm, τmax = 300 MPa ,
G = 80 GPa = 80 × 103 N/mm2, d = ?, n = ?, l = ?
Using Eq. (3) for maximum shearing stress
τ = 16W R / π d3
or 300 = 16 × 1200 × R / π d 3
∴ R/ d 3 = 0.049 or R = 0.049 d 3 ----------- (1)
40/0.049 or d = 9.35 mm --------- (2)
From Eq. (7)
Δ= 64 W R3 n / Gd 4
∴ 120 =6 4× 1200 × R3 n/80 × 103 × d 4
or R3 n/ d 4 = 125
Using values of R and d,
403 × n / 9.354 = 125
∴ n = 14.9 ; 15
l = 2 π R n
= 2 π (40) (15)
= 3770 mm
Workplace Operations Requiring Safety The operations performed through workers in their workplace are of dissimilar nature but they involve a number of machine, equipment and
Question: The disk 3 shown in the figure rotates at a constant angular velocity w 3 = 2.0 rad/s. A slider in a slot in the disk causes rod 2 to rotate. When the slider
Q. Design Temporary Storage? It is sometimes acceptable to store drums temporarily on spill containment pallets. Each pallet should be capable of capturing the contents of at l
Find the Laplace transform of the following differential equation: ? +3? +6x = 0, x(0) =0, ?(0)=3 Taking the inverse Laplace transform of X(s), obtain the time solution x(t).
#what is porosity in welding is this different from pin hole
Properties of Some Fibres
Determine maximum shearing stress in shaft: A propeller shaft 100 mm in the diameter, is 45 m long, transmits 10 MW at 80 rotation per minute. Determine maximum shearing str
Figure presents a gearbox that you are going to design. The input shaft rotates at n1= 1500 rpm in a counterclockwise direction. The gearbox is needed to be designed sothat the out
Calculate the principal dimensions of a cone clutch faced with leather to transmit 30 KW at 750 r.p.m. from an electric motor to an air compressor. Draw a section front view of the
Motion of two bodies - rough surface and smooth pulley: THE HORIZONTAL SURFACE IS ROUGH AND THE STRING IS PASSING OVER SMOOTH PULLEY. Figure shows two weights W 1 and W 2
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd