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scoundrel [369]
3 years ago
9

For an isotropic material, E and ν are often chosen as the two independent engineering constants. There are other elastic consta

nts: the shear modulus G, the bulk modulus K, and the Lames’ constants, μ and λ.
Suppose that G = E/[2(1+v)].
Prove that μ and λ, and K, satisfy the following relations:

μ = G = 3K(1-2v)/[2(1+v)], λ = Ev/ [(1+v)(1-2v)] = 2vG/ (1-2v),
K = E/ 3(1-2v) = λ+(2/3)μ

To prove it, apply pure shear stress τ, and connect it to pure shear strain γ by G, ie. τ = Gγ. Then in the 45° orientation, consider its normal stresses σ, and σ: are related to its normal strains ε, and e, through E and v in Hooke's law. We can easily establish this relation.
Engineering
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

khgy

Explanation:

nbv

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Consider laminar, fully developed flow in a channel of constant surface temperature Ts. For a given mass flow rate and channel l
Pachacha [2.7K]

Answer:

Please see attachment.

Explanation:

8 0
3 years ago
Air is saturated with water vapor at 35.0 oC and a total pressure of 1.50 atmospheres. If the molar flow rate of the dry air in
Marizza181 [45]

Answer:

11.541 mol/min

Explanation:

temperature = 35°C

Total pressure = 1.5 * 1.013 * 10^5 = 151.95 kPa

note : partial pressure of water in mixture = saturation pressure of water at T = 35°c )

from steam table it is = 5.6291 Kpa

calculate the mole fraction of H_{2}o ( YH_{2}o )

= 5.6291 / 151.95

= 0.03704

calculate the mole fraction of air ( Yair )

 = 1 - mole fraction of water

= 1 - 0.03704 = 0.9629

Now to determine the molar flow rate of water vapor in the stream

lets assume N = Total molar flow rate

NH_{2}o = molar flow rate of water

Nair = molar  flow rate of air = 300 moles /min

note : Yair * n = Nair

therefore n = 300 / 0.9629 = 311.541  moles /min

Molar flowrate of water

=  n -  Nair

= 311.541 - 300 = 11.541 mol/min

4 0
3 years ago
Match the words with their definitions
Pavlova-9 [17]

Wooden 2 X 8's, 10's, or 12's that run parallel to one another and support a floor or ceiling, and supported in turn by larger beams, girders, or bearing walls- <u>Joist</u>

Explanation:

  1. Wooden 2 X 8's, 10's, or 12's that run parallel to one another and support a floor or ceiling, and supported in turn by larger beams, girders, or bearing walls- <u>Joist</u>
  2. A point where a bearing/structural weight is concentrated and transferred to the foundation-<u>Point Load</u>
  3. Includes all exterior walls and any interior wall that is aligned above a support beam or girder-<u>Load Bearing Wall</u>
  4. Plywood substitute made of coarse sawdust that is mixed with resin and pressed into sheets-<u>Particleboard</u>
  5. The replacement of excavated earth into a trench around or against a basement/crawl space foundation wall- <u>Backfill</u>
  6. Continuous 8m" or 10" thick concrete pad installed before and supports the foundation wall or monopost-<u>Footing</u>
  7. Ribbed steel bars installed in foundation concrete walls, footers and poured in place concrete structures designed to strengthen concrete-<u>Rebar</u>
  8. The end, upper, triangular area of a home, beneath the roof-<u>Gable</u>
  9. A manufactured 4X8 wood panel made out of 1-2 wood chips and glue. Often used as a substitute for plywood-<u>OSB</u>
  10. The incline slope of a roof or the ratio of the total width of a house-<u>Pitch</u>
  11. A manufactured structual wood beam. It is constructed of pressure and adhesive wood strands of wood-<u>Microlam</u>

5 0
2 years ago
For every 3 people at the concert singing along, there are 5 people not singing along. If there are 180 more people not singing
Ymorist [56]

Answer:

The total people are at the concert

= 296

Explanation:

a) Data and Calculations:

Ratio of the number of people singing along at the concert to the number of people not singing along

= 3:5

The number of more people not singing along = 180

Therefore, the total number of people not singing along = 185 (180 +5)

Every person singing along = 185/5 * 3 = 111

Total number of people at the concert = number of people not singing along plus number of people singing along

= 185 + 111

= 296

6 0
2 years ago
How does geothermal work
puteri [66]

Answer:

geothermal heating works by moving temperature-conducting fluid through an underground loop of pipes beneath or near your home. This allows the fluid to collect the thermal energy deposited in the earth from the sun.

Explanation:

5 0
3 years ago
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