1. Please see attachment for Question I've put it into microsoft eqn editor.
2. I have not got a clue where to begin i don't want anyone to do it for me but some information on how i can do it for myself would be appreciated.
3. as above
J = (pi/32)*(D^4-d^4)
T/J = Sheer Stress/r
T = Torque
r = Radius of external diameter
D = External diameter
d = Internal diameter
These are some formula I've tried working through but i need J or D to work it through.
I'm :confused: I'm OK at electrical theory but mechanical just doesn't compute.
I have the following question if anyone can help.
Determine the external diameter of a tube needed to transmit a torque of 30KNm if it has an external diameter twice that of its internal diameter. The sheer...
Mechanical Engineering Stresses
I am really struggling with the following problem:
A rectangular tube with no given length has the dimensions shown in the diagram (within the attachment). Find the maximum tensile and compressive stresses that such a section will experience due to a bending...
I did think i should be using trig identities . I was a little confused:confused: because the question was taken directly from a book it is written exactly as i wrote it in my request.
P.S sorry about my grammer as i was rushing before work.
i am just about to start an electrical course at college and I've been reading up on some mathematics i will need when i start my problem is i don't know much about compound angles and trig and i want to complete some examples within a book the following problem is the one i need help with...