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Spring-1996-EMA6166-Exam-1

Spring-1996-EMA6166-Exam-1 - Page 1 EMA 6166 Polymer...

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Page 1 Name: EMA 6166 Polymer Composites Soc. Sec. No. _____________________ Dr. A. Brennan EXAM I (120 minutes) Thursday, February 15, 1996 HONOR CODE : We, the members of the University of Florida community, pledge to hold ourselves and our peers to the highest standards of honesty and integrity * . Part I: Definitions (20 pts) Give a brief, succinct description of the term(s) listed using only the space provided. Use equations where appropriate. 1. HDT: 2. IFSS: 3. roving: 4. lamina: 5. orthotropic: 6. critical v f : 7. DGEBA: 8. PEEK:
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Page 2 Name: 9. B-Staged Epoxy: 10. DDS: Part II: Indicate whether the following statements are TRUE or FALSE . Give an explanation if the statement is false. (12 pts) 1. Stress at failure increases linearly with volume fraction of fiber (transverse loading). 2. Stress at break of Kapton increases linearly with dose (gamma). 3. Critical fiber length is directly proportional to effective fiber diameter. 4. Oxygen plasma treatments increase adhesion and ultimate strength of polyethylene fibers..
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Page 3 Name: Part III: Plot the appropriate relationships on the axes provided.
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