Question

bar subjected to gravity load (two segments)
the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young module total length of bar is 2 when bar is hung with ceiling it stretches its own weight no other loads are applied neglect gravity load on the top half of the bar

Answer 1

Bar subjected to gravity load (two segments)
The bar in the figure has constant cross sectional area . The top half of the bar is made of material with mass density , and Young’s modulus . The bottom half of the bar is made of material with density and Young’s modulus . The total length of the bar is . When the bar is hung from the ceiling, it stretches under its own weight. No other loads are applied. Assume [so you can neglect the gravity load on the top half of the bar].

Obtain a symbolic expression for .


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Obtain a symbolic expression for .


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Obtain a symbolic expression for .


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please give the solution of these questions?

Answer 2

Symbolic expression for fx(x):
0<x<L/2 : rho_1*g*A
L/2<x<L : rho_2*g*A
Symbolic expression for N(x):
0<x<L/2 : rho_2*g*A*L/2
L/2<x<L : rho_2*g*A*(L-x)

Answer 3

Thanks Access! Where you successful with Problem 2 please? I could only manage 3 and 4.
Thanks.

Answer 4

thanks access.

Answer 5

Please help me,
anyone figured out problem 3 and 4?

Answer 6

Obtain a symbolic expression for,

0<x<L/2,ea(x):
0<x<L,ea(x):
Obtain a symbolic expression for the total elongation of the bar,  

please help for these two problems.

Answer 7

Anyone for further problem 1 and 2 please?

Answer 8

Obtain a symbolic expression for ϵa(x).

For 0≤x<L2, ϵa(x): (rho_2*g*L/2 )/(E_1)

For L2<x≤ L, ϵa(x): (rho_2*g*(L-x))/(E_2)

Answer 9

Thanks, gluglu! do you have problem 2?

Answer 10

please problem 2!

Answer 11

Hey guys, what about #4: Obtain a symbolic expression for the total elongation of the bar, δ.
Anybody?

Answer 12

any 1 know about #4 ??

Answer 13

Problem 2...
rho*omega^2*(R*L+L^2/2)
(rho*omega^2/E)*(L^3/3+L^2*R/2)
(rho*omega^2/E)*(11*L^3/48+3*L^2*R/8)

Answer 14

anyone for the 4-th from the firs Q?

Answer 15

Thanks a lot gluglu

Answer 16

Great, thanks gluglu!
Anyone for last question in Problem 1?

Answer 17

Anyone for last question in Problem 1?

Answer 18

physics

Answer 19

for problem 1,part 4

(rho_2*g*L^2)/(4*E_1)+(rho_2*g*L^2)/(8*E_2)

Answer 20

Thanks S

Answer 21

calculate the x-component of the reaction force at   ,      , and the axial resultant   at section   ,     , for these four bars in axial loading. Submit your answers in Newtons.

(1)    R A x  N
incorrect  N C   N
incorrect

1. HW1_1: Part 2 : 2.0 points
(2)

 R A X   N
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 N C   N
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2. HW1_1: Part 3 : 2.0 points
(3)

 R A X      N
unanswered
 N C   N
unanswered
3. HW1_1: Part 4 : 2.0 points
(4)

R A X        N
unanswered
N C    N
unanswered
plz help