Physics
posted by helpless
Tapered bar with end load
The small tapered bar BC has length L=0.1 m and is made of a homogeneous material with Young’s modulus E=10 GPa. The cross sectional area of the bar is slowly varying between A0=160 mm^2 (at B) and A0/2 (at C), as described by the function:
A(x)=A0/(1+(x/L))
The bar is fixed at B and a load P=8kN is applied at the free end C. Determine the total elongation, δ, of the bar. (in mm)

Mag
Please help!

FLu
0.71 mm
Problem 3) 184 MPA
Anyone for Problem 1 and 2 please? 
Mag
Thanks FLu!
Yes, Problem 1+2 please? 
Ortum
Great thanks!
Problem 1 and 2 please? 
RORO
0.71 mm is bad answer

Anonymous
RORO, it worked for me, there must be tolerance, try 0.73 and let me know if it work?
Do you have problem 1 and 2? 
FLu
Yes, must have something to do with tolerance RORO, try 0.73, there was technical issue before.
RORO did you get problem 1 and 2 please? 
Saga
Anyone for problem 1&2?

RORO
Ok, thanks. No, I hav not solution for 1 and 2!

Nura
Anyone Problem 1 and 2 please?

mehwish
anybody have the solution of problem 1 and 2?

Any
Anyone please?

Anonymous
Pretty please with sugar on top?

Flaminuous
Yes, as this wannabe Anonymous sais, please help with glucose on top!

Anonymous
I figured out the first answer, it was very simple, just had to multiplicate density(kg/m^2) x area(m^2) x gravity(m/s^2)= (kg m/s^2)= (N)
So:fx(x)=rho_1*g*A
I don't understand why f depends on x 
FLu
Anonymous, tried it out but it says rho_1 not allowed in answer. How did you manage?

Saga
rho_1 not permitted, please help!

Hura
same problem!

Nyu
Problem 1 and 2 please?

Anonymous
The first answer for the first exercise should be: rho_1*g*A
Try typing it, not copy/paste.
rho_1 isn't allowed for L/2 to L 
FLu
Thanks Anonymous now it worked.
Have you had luck with Problem 2? 
RORO
fx(x)=rho_2*g*A for L/2 to L

FLu
Thanks RORO, any luck with the second Problem set?

Mag
THanks guys, anybody managed other problem in 1 and 2?

mehwish
I cannot understand the solution of f(x)=rho_1*g*A plz give the two words of question as a hints

mehwish
I cannot understand the solution of f(x)=rho_1*g*A plz give the two words of question as a hints

Neon
Anybody had luck with other problem 1 and 2 please?

F10
If you don't understand the solution then you have to read the exercises at least.

Neon
F10 is right. DO you have managed Problem 1 or 2 F10?

faryia
I read but I don't understand because some guys talking on one question and some guys talking on other question at the same time.

But
Anyone for Problem 1 and 2 please?

mono
Rotating blade (body force in axial loading)
A blade is fixed to a rigid rotor of radius R spinning at ω rad/sec around the vertical zaxis (see figure). Neglect the effects of gravity.
4.
5.Calculate the peak stress in the blade: σmaxn
6.Calculate the blade elongation: δ
7.Calculate the displacement of the blade midsection: ux(L/2)
8.Given:
9.Young's modulus, E , mass density, ρ .
· Constant cross sectional area, A
· Rotor radius R , blade length L
· Angular velocity ω
(Hint: if you work in the noninertial frame of the rotating blade, the d'Alembert force/unit volume is ρω2r along the +x direction)
1. Try it:
2. σmaxn=
3.
4. unanswered
5.
6.
7.
8.
1.
2. Try it:
3. δ=
4.
5. unanswered
6.
7.
8.
9.
1.
2. Try it:
3. ux(L/2)=
4.
5. unanswered
6.
7.
8.
A blade is fixed to a rigid rotor of radius R spinning at ω rad/sec around the vertical zaxis (see figure). Neglect the effects of gravity.
Calculate the peak stress in the blade: σmaxn
Calculate the blade elongation: δ
Calculate the displacement of the blade midsection: ux(L/2)
Given:
Young's modulus, E , mass density, ρ .
· Constant cross sectional area, A
· Rotor radius R , blade length L
· Angular velocity ω
(Hint: if you work in the noninertial frame of the rotating blade, the d'Alembert force/unit volume is ρω2r along the +x direction)
plzzzzzzzzzzzzzzzz help.

Hta
Problem 1 and 2?

Gaby
Please 1 and 2?

Byrta
ANy further Problem 1 and 2 answers?

FLu
No, sorry was not succesful, any other had chance with problems 1 and 2?

Bart
Please other Problem 1 & 2!

Deas
Other problems in 1 and 2 please?

Magnum
Help problem 1 and 2?

bei
Given the displacement field, find the loading (inverse problem)
The composite bar is composed of an inner core of cross sectional area A and a sleeve of cross sectional area . The Young's modulus of the sleeve is and the modulus of the core is . Under the effects of unknown distributed loading, , the bar is observed to deform. The measured displacement field in the bar is , where is a dimensional constant and is the length of the bar. The origin of the xaxis is at the fixed support,10M . The maximum magnitude (absolute value) of stress in the core is found to be Pa.
plz help
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