00044___d87fd7338e0faec7d622cec05575291a

00044___d87fd7338e0faec7d622cec05575291a - Sec. 1.7...

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Sec. 1.7 BIOMECHANICS 23 Biomechanics has the following salient features: (1) Material Constitution Every living organism has a solid structure that gives it a unique shape and size, and an internal fluid flow that transports materials and keep the organism alive. Hence biosolid mechanics is inseparable from biofluid me- chanics. The cells make new materials. Hence the composition, structure, and ultrastructure of biomaterials change dynamically. (2) The Constitutive Equations Blood is a non-Newtonian fluid. Synovial fluid in the knee joint, and body fluid in the abdominal cavity are also non-Newtonian. The bone obeys Hooke’s law. The blood vessel, the skin and most other soft tissues in the body do not obey Hooke’s law. We must know the constitutive equations of biological tissues, whose determination was a major task of the early biomechanics. When attention is focused on cells, the determination of the constitutive equations of DNA and other molecules becomes a primary task.
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This note was uploaded on 01/04/2012 for the course ENG 501 taught by Professor Thomson during the Fall '05 term at MIT.

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