ema6580-spring-2010-exam1

ema6580-spring-2010-exam1 - SCIENCE OF BIOMATERIALS Spring...

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Unformatted text preview: SCIENCE OF BIOMATERIALS Spring 2010 STUDENT UFID#:______________________ EMA 6580 - EXAM 1 (use the NEW UF ID No.) INSTRUCTIONS: Read the entire exam carefully. Answer every question to the best of your ability, based upon the available information. State all assumptions you use in answers. Section I: General Applications/Characteristics of Biomaterials. Give brief descriptions/short answers to each question below. (24 pts) 1. Identify 3 materials used in bone replacement therapy. 2. Identify 3 materials used in vascular implants. 3. Identify 2 materials used in heart valve replacement therapy 4. Three types of chemical bonds of materials 5. Alloys used in total hip arthroplasty 6. Free radical or addition polymerization. 7. Surface energy sessile drop method 8. Austenitic versus Martensitic Phase Transformations 9. Super hydrophobic versus super hydrophoci. 10. S-N Curves 11. Thermoplastic versus thermoset plastic 12. Grain boundaries SCIENCE OF BIOMATERIALS- Spring 2010 EMA 6580 - EXAM 1 2 Section II: Concepts. Answer the following statements with TRUE or FALSE . If the statement is false, state the reason(s). If you believe a statement can be made TRUE by a simple qualifier, then state it clearly. (Normally only a single word change is required.) (12 pts) 13. The difference between the infinite stress at break versus the stress at break for a given molar mass is directly proportional to the molar mass. 14. The modulus of an austenitic stainless steel increases with the heat applied and time at heat. 15. XPS is used typically to probe the chemical structure of polymeric materials to a depth of 1 micron. 16. The AFM scanning of a surface induces a potential force displacement proportional to the probe position on the material. 17. Grain orientation is increased with annealing of austenitic steels such as 316L after work hardening. 18. The propagation step of an addition polymerization results in the combination of two radicals at the ends of polymer chains. SCIENCE OF BIOMATERIALS- Spring 2010 EMA 6580 - EXAM 1 3 Section III: Graphical Relationships. 1. Each plot should be represented as a linear function if possible through algebraic manipulation. 2. You must select and show all equations used to create the plot. 3. Label all axes appropriately, i.e., provide units and orders of magnitude. 4. STATE ALL ASSUMPTIONS required. 19. Shift factor versus reduced temperature (T-T ref ) for a semi-crystalline polymer. (2pts) 20. Recovery stress versus elongation ratio biaxial orientation for an ideal elastomer. (2pts) SCIENCE OF BIOMATERIALS- Spring 2010 EMA 6580 - EXAM 1 4 SECTION IV: Definitions/Concepts....
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ema6580-spring-2010-exam1 - SCIENCE OF BIOMATERIALS Spring...

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