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# HW2 - a Calculate the force that breaks the thermoplastic...

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Full name:________________________________ Lab group: L 5 _ _ (-5 pt for wrong info) HW2, ET181, Fall 11. Due by 6 pm on Friday, Sep 16. Cited problems are from the 4th edition of textbook. The Grader is not responsible for missing paper; please use both sides of your papers and staple your sheets. 1) Multiple choice questions Page 39 Page 63-64 Question Answer Question Answer 2.1 A 3.1 A, D, E 2.3 D, E, G 3.2 C 2.5 A, C, D 3.5 B 2.6 E * 3.7 B 2.11 B, F 3.10 B * can be 4 for 14, depending on how you count Page 134-135 Page 185-186 Question Answer Question Answer 6.4 C 8.1 A 6.6 B 8.3 A 6.8 E 8.7 A 6.11 B 8.9 B 6.16 B, E 8.15 B 2) An ABS plastic rivet is used to secure two 6061-T6 aluminum plates. The rivet diameter is Ø1/4 inch, while the aluminum plates are 1x6 inch with 1/8 inch thick. The aluminum plates are pulled apart as shown until breaking of the rivet. Properties of plastics can be found in Chapter 8.

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Unformatted text preview: a) Calculate the force that breaks the thermoplastic ABS rivet. b) Calculate the difference (%) of breaking force if the rivet material is changed to thermoset Phenol Formaldehyde (epoxy). Note: The rivet diameter is fractured in this case. The force is a shearing force since the fracture surface is parallel to it. Al rivet Force Force Al p1/2 Full name:________________________________ Lab group: L 5 _ _ (-5 pt for wrong info) p2/2 3) Drawing Referring to the attached figure, sketch on a single sheet of square-grid paper the orthographic (2 dimensional) drawings of: a) front view b) top view, sectioned though centers of the two Ø32 mm holes c) left side view, sectioned through center of the Ø30 mm hole. You must position your drawings at the correct locations. All units are in mm. No dimensioning is required and all holes are through the part thickness. Show all lines. No computer plot, please! FRONT...
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HW2 - a Calculate the force that breaks the thermoplastic...

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