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jarptica [38.1K]
3 years ago
10

Is it possible to produce a continuous and oriented aramid fiber-epoxy matrix composite having longitudinal and transverse modul

i of elasticity of 35 GPa and 5.17 GPa, respectively? Assume that the modulus of elasticity of the epoxy is 3.4 GPa and modulus of elasticity for aramid fibers is 131 GPa.
Engineering
1 answer:
OlgaM077 [116]3 years ago
4 0

Answer:

Both value of V are different, therefore, what is proposed in the question is not possible

Explanation:

Given data:

E₁=35 GPa (longitudinal moduli of elasticity)

E₂=5.17 GPa (transverse moduli of elasticity)

Ee=3.4 GPa (elastic modulus epoxi)

Ef=131 GPa (elastic modulus fiber)

To produce a continuous and oriented aramid fiber-epoxy matrix, the volume fraction of the fibers must be the same. Then, we must calculate the volume fraction of the fibers in the longitudinal and transverse:

For the longitudinal:

E_{1} =E_{e} (1-V)+E_{f} V\\35=3.4*(1-V)+131V

Solving for V:

V=0.2476

For the transverse:

E_{2} =\frac{E_{e}E_{f}  }{E_{f}*(1-V)+E_{e}V  } \\5.17=\frac{3.4*131}{131*(1-V)+3.4V}

Solving for V:

V=0.3515

You can see that both value of V are different, therefore, what is proposed in the question is not possible

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What is the primary responsibility of ABET?
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Answer:

C

Explanation:

The ABET (Accreditation Board for Engineering and Technology) is a non-governmental organization that accredits programs in applied science, computing, engineering, and engineering technology, both in the United States and elsewhere.

Give Brainliest pls

5 0
3 years ago
If the dry-bulb temperature is 95°F and the wet-bulb temperature is also 78°F, what is the relative humid- ity? What is the dew
Sidana [21]

Answer:

Relative humidity 48%.

Dew point 74°F

humidity ratio 118 g of moisture/pound of dry air

enthalpy 41,8 BTU per pound of dry air

Explanation:

You can get this information from a Psychrometric chart for water, like the one attached.

You enter the chart with dry-bulb and wet-bulb temperatures (red point in the attachment) and following the relative humidity curves you get approximately 48%.

To get the dew point you need to follow the horizontal lines to the left scale (marked with blue): 74°F

for the humidity ratio you need to follow the horizontal lines but to the rigth scale (marked with green): 118 g of moisture/pound of dry air

For enthalpy follow the diagonal lines to the far left scale (marked with yellow): 41,8 BTU per pound of dry air

5 0
3 years ago
Beryllium (Be) has an HCP unit cell for which the ratio of the lattice parameters c/a is 1.568. If the radius of the Be atom is
sweet-ann [11.9K]

Answer:

Unit cell volume will be

4.866*10^{-2}nm^{3}

8 0
3 years ago
A voltage regulator is to provide a constant DC voltage Vl=10V to a load Rl from a nominal Vcc=15V supply voltage. The load can
Luden [163]

Answer:

Beta values can be from the equation=change in Vcc/nominal Vcc

Beta=16-3/15=3/15=1/5=0.20

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7 0
4 years ago
HW6P2 (20 points) The recorded daily temperature (°F) in New York City and in Denver, Colorado during the month of January 2014
Maurinko [17]

Answer & Explanation:

function Temprature

NYC=[33 33 18 29 40 55 19 22 32 37 58 54 51 52 45 41 45 39 36 45 33 18 19 19 28 34 44 21 23 30 39];

DEN=[39 48 61 39 14 37 43 38 46 39 55 46 46 39 54 45 52 52 62 45 62 40 25 57 60 57 20 32 50 48 28];

%AVERAGE CALCULATION AND ROUND TO NEAREST INT

avgNYC=round(mean(NYC));

avgDEN=round(mean(DEN));

fprintf('\nThe average temperature for the month of January in New York city is %g (F)',avgNYC);

fprintf('\nThe average temperature for the month of January in Denvar is %g (F)',avgDEN);

%part B

count=1;

NNYC=0;

NDEN=0;

while count<=length(NYC)

   if NYC(count)>avgNYC

       NNYC=NNYC+1;

   end

   if DEN(count)>avgDEN

        NDEN=NDEN+1;

   end

   count=count+1;

end

fprintf('\nDuring %g days, the temprature in New York city was above the average',NNYC);

fprintf('\nDuring %g days, the temprature in Denvar was above the average',NDEN);

%part C

count=1;

highDen=0;

while count<=length(NYC)

   if NYC(count)>DEN(count)

       highDen=highDen+1;

   end

   count=count+1;

end

fprintf('\nDuring %g days, the temprature in Denver was higher than the temprature in New York city.\n',highDen);

end

%output

check the attachment for additional Information

8 0
4 years ago
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