Day 13

Intro to Engineering

Allen Sam

6-28-18

Activity 5.6a

Aluminum Object Example 1

1.      What is the volume of the part?

A.     1.875 in.³

B.     1.125 in.³

C.    1.375 in.³

D.    2.125 in.³

c.1.375

                

2.                                                      What is the density of aluminum in grams per cubic centimeter? (This may require research. Be sure to document your source.)

 2.700g/cm^3

3.                                          What is the density of aluminum in pounds per cubic inch? Show your work including all conversion factors. 

 0.0975437 pounds per cubic inch

2.700 x 2.54^3 / 453.592

4.                                          Find the mass of the object (in pounds-mass) if it is made of aluminum.

A.     0.125 lb_m

B.     0.135 lb_m

C.    0.257 lb_m

D.    0.312 lb_m

b. 0.135lb_m

5.      What is the surface area of the part?

A.     7.250 in.²

B.     8.250 in.²

C.    9.250 in.²

D.    10.250 in.²

d.   10.250 in.²

6.      What are the physical properties presented in the CAD software? Include units.

A.  Density ____2.700g/cm^3___________ B.  Mass _____0.1341b__________ C.  Surface Area ____10.250 in^2___________ D.  Volume ___1.375in^3____________

 

7.      If one quart of cleaning solution will clean 14400 in.², how many quarts will be required to clean 3000 parts? Use 3D software physical properties.

A.     2.000

B.     1.500

C.    2.135

D.    2.145

SHOW WORK:

3000 x 10.250 = 30750

1/14400=x/30750

x=2.135 quarts 

Brass Object Example 2

1.      What is the volume of the part?

A.                 2.375 in.³

B.                 3.125 in.³

C.                2.031 in.³

D.                4.125 in.³

c. 2.031 in.³

2.      What is the density of brass in grams per cubic inch?

 8.470 g/cm^3 x 2.54^3 = 138.79843208 grams per cubic inch

3.      What is the density of brass in pounds per cubic inch? Show your work including all conversion factors.

 8.470 x 2.54^3 / 453.592

=0.03059982 lbs per cubic inch

4.      Find the mass of the object if it is made of brass.

A.                 0.621 lb_m

B.                 0.547 lb_m

C.                0.257 lb_m

D.                0.312 lb_m

a. .621 lb_m

5.      What is the surface area of the part?

A.                 6.000 in.²

B.                 8.000 in.²

C.                0.250 in.²

D.                12.000 in.²

d. 12.000 in.²

             

6.      What are the physical properties presented in the CAD software? Include units.

a.                                          Density _____8.470 g/cm^3__________ b.                                          Mass ______0.615 lb_____________ c.                                          Surface Area _____11.934 in^2______________ d.  Volume ___________________

7.      What will be the total cost to ship 100 brass parts if the shipping rate is $4.25 per pound? Use the physical properties from the CAD analysis. SHOW WORK.

High Density Polyethylene Example 3

1.      What are the physical properties presented in the CAD software? Include units.

A.  Density _____0.952 g/cm^3______________ B.  Mass ______0.301 lb_____________ C.  Surface Area ________30.100 in^2___________ D.  Volume ______8.747 in^3_____________

2.      What is the surface area in square centimeters? SHOW WORK.

30.100 x 2.54^2 =194.19316 cm^2

3.      What is the volume in cubic centimeters? SHOW WORK.

8.747 x 2.54^3=143.337648808 cm^3

4.      What is the weight of the high density polyethylene part in pounds? Show your work and include all conversion factors.

w=mg

w= .301 x 9.8 = 2.9498 slugs

5.      How many parts can be made from 152 pounds of high density polyethylene? SHOW WORK.

152 lbs is 4.7243 slugs

4.7423/2.9498= rounds down to one part

Physical Property Analysis of Your Puzzle Cube

1.      What are the physical properties presented in the CAD software? Include units.

a.      Density (from Activity 5.4)  ____.66 g/ cm^3_______________

b.      Mass ______1.6019_lb____________

c.      Surface Area ____65.252 in^2_______________

d.      Volume ______11.391 in^3_____________

If the physical properties are different from hand-calculated values in Activity 5.4 Calculating Properties of Solids, explain why you think they differ.

Physical Property Analysis of Automoblox Vehicle

2.      What are the physical properties presented in the CAD software? Include units.

a.      Density (from Activity 5.3) ______.72 g /cm^3_____________

b.      Mass ____.515 lbs_______________

c.      Surface Area ____193.858 in^2_______________

d.      Volume ______23.311 in^3_____________

3.      If there is a 4% loss of material in the manufacturing process, how much material should be purchased to produce 10,000 connector pieces? SHOW WORK.

23.311 x 10000 x 1.04 = 242,434.4 in^3 of material

4.      If the cost of the plastic to manufacture the connector parts is $0.015 per cubic inch of material, what is the cost to manufacture 10,000 connector pieces? SHOW WORK.

242434.4 x .015= 3636.516 dollars

Conclusion

1.      What do you need to know in order to perform a physical property analysis?

You need to know the density, material, surface area, and volume to perform physical property analysis.

2.      Why is it important to understand the mathematics used in physical property analysis?

It is important to understand mathematics in property analysis because you need to know how to calculate certain dimensional analysis and measurements for property analysis

3.      Why is it important to perform a physical property analysis prior to producing a part?

It is important to perform a physical property analysis because you need to know the logistics of the object you are producing.

4.      The clear enclosure piece and the wheels of the Automoblox are manufactured from polycarbonate. Do you think that the connector pieces are also manufactured from polycarbonate? Justify your answer.
I would say no because according to my physical property analysis, the densities of the two plastics are different.