Back Exam 3B - Please review and complete the required...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Please review and complete the required information on this cover page before answering the questions . Biomechanics BME 4540 Department of Biomedical Engineering Rensselaer Polytechnic Institute In-class closed book Exam III December 8, 2005 Duration : One hour & 50 minutes (2 PM to 3:50 PM) Total points:100 Name : This examination accounts for 15% of your final grade. Please read the instructions carefully and answer each question to the best of your abilities. Total number of pages including cover 11
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
NB: Not all questions carry equal weight. The points are indicated in parenthesis by each question. Allocate your efforts accordingly and do not exceed the space provided. Be specific and brief. 1. Articular cartilage derives its mechanical properties from a complex interaction among its components including collagen, proteoglycans, water, sodium, and calcium ions. Explain how decrease in pH and increase in salt concentration will affect (increase or decrease) the compressive properties of the cartilage . ( 8 p o i n t s ) Salt Concentration pH 2.An unknown disease causes human bone to loose its anisotropic fracture behavior and become isotropic. Using the values of stress intensity factor (K I ), energy release rate (G) and Elastic modulus (E) measured from mechanical tests determine which of the following bone (A or B) is taken from the diseased human donor? Explain your answer giving reason (mathematical reasoning required) (8 points) Bone A K I = 3 M Pa m G = 0.5 N/m E = 18 GPa Bone B K I = 2 M Pa m G = 1.0 N/m E = 16 GPa 2
Background image of page 2
3. Identify (define exactly; no partial credit) the wear mechanism of ultra-high- molecular-weight polyethylene acetabular component shown below: (6 points) (a) (b) (c) 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4. An electrical strain gage rosette was installed on each proximal lateral quadrant
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

Back Exam 3B - Please review and complete the required...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online