bioe119-sp01-final-Keaveny-exam

Assume concentric circular cross sections of the bone

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Unformatted text preview: ralized, assume its elastic modulus is 12 GPa. Assume concentric circular cross-sections of the bone and implant. Page 5 of 10 ME/BioE C176 Final Exam, Spring 2001 Page 6 of 10 Name:__________________________________ ME/BioE C176 Final Exam, Spring 2001 Page 7 of 10 Name:__________________________________ ME/BioE C176 Final Exam, Spring 2001 Name:__________________________________ 4. Miscellaneous [28 points total] A. [5 points] Fill in the following table of elastic modulus properties with approximate values: Material Young’s modulus (MPa) Cortical bone † Trabecular bone† Young hip Trabecular bone† Old spine Tendon UHMWPE PMMA Ti-6Al-4V alloy CoCr alloy, cast CoCr alloy, forged CoCr alloy, HIPed†† † for bone, give a typical mean value for the longitudinal direction. †† HIPed — hot isostatically pressed. B. [15 points] The general time-dependent behavior of many soft tissues, and even bone, can be modeled approximately using spring-dashpot models, such as that shown below. E KV EH m Show that the governing differential equation relating stress s to strain e for this model is of the form: ∂s ∂e + as= b + ce ∂t ∂t by deriving expressions for the constants a, b, and c in terms of EH, EK V, and m. Page 8 of 10 ME/BioE C176 Final Exam, Spring 2001 Page 9 of 10 Name:__________________________________ ME/BioE C17...
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This document was uploaded on 03/08/2014 for the course BIOE 119 at University of California, Berkeley.

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