Zoology 427 Biomechanics
Problem Set 6. Some basic relationships: Assume induced grad is negligible for all that follows. Lift = L = 0.5 S CL U2 Drag = D = 0.5 S CD U2 For gliders: L = m g cos() D = m g sin() = glide angle Animal Data (there are m
Biology 427 Biomechanics 2007 Lecture 13. Finite elements, joints and skeletons Recap FEM and stress distributions. Finite Element Analyses in Evolution Motion is permitted at joints with several degrees of freedom and low EI Mechanical advantage an
Biology 427 Bimechanics 2007 Lift and circulation Recap drag, shape, and the Reynolds number Return to lift and Bernoulli Basic definitions of wing shape The relationship between lift and circulation Mechanisms that promote or maintain circulation. T
Zoology 440 Biomechanics 2007 Lecture 21. Flapping flight fundamentals. Recap lift coefficients, gliding and soaring. Differentiating steady, quasi-steady and unsteady flows. Circulation takes time to develop. Methods of analysis. Wed - comments on p
Biology 427 Biomechanics Lecture 20. Gliding flight: a soar topic Recap basics of lift and circulation The consequences of aspect ratio The lift coefficient (CL) Drag coefficients for wings Drag and lift together (polar plots) Gliding flight
Lift an
Biology 427 2007 Lecture 23. Life at Low Reynolds Numbers Recap High Re Number Swimming Low Reynolds Number Phenomena Ciliary locomotion Dilemmas about force generation Regulation of cilia and flagella
Balance of forces (thrust and "drag")for a swim
Zoology 440 Biomechanics 2008 Lecture 17. Drag and the Reynolds number. ! ecap conservation of energy and mass R ! 'Alembert's Paradox and the missing energy D ! wake is a separate issue A ! he Reynolds number measures the relevance of viscous T and
Zoology 440 Biomechanics 2008 Lecture 16. Basic fluid dynamics: defining properties of fluids. ! ecap definition of a fluid and Newton's law of viscosity. R ! onservation of mass and continuity C ! n applicaion of continuity A ! onservation of energy
Zoology 440 Biomechanics 2007 Lecture 11. More on shape and stress: architecture in biology and the design of bones Recap flexural stiffness,I, and biological beam examples. The stress distribution on a beam. The design of mammalian long bones.
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Biology 427 Biomechanics 2008 Lecture 12. Less simple structures: dealing with anisotropy, inhomogeneity, and scaling in biological structures.
Project proposals: DUE MAY 5 Names of participants Title of the project Abstract (tentative) ! learly exp
Zoology 440 Biomechanics 1999 Problem Set 5. Some useful data: water density = 1000 kg/m3 viscosity of water = 0.0011 kg/ (m s)
1. Human aortas have a diameter of about 1 cm and the average speed of blood moving in these tubes is 20 cm/s. The averag
Biology 427 Problem Set 4
Resources: Web link entitled "Beam Basics" on class syllabus shows various formulas for second moment of area (I) for a variety of beam cross sections. Stress distribution (s) in a beam: s = M y / I where M is the applied
Biology 427 Problem Set 2 Here are some interesting and useful data for this second problem set. You may not need all of this stuff. As usual, we have also provided you with another article for your insightful commentary. Raw data Peak human running
Zoology 440 Biomechanics 2008 Lecture 15. Basic fluid dynamics: defining properties of fluids. ! here we have been and where we are going W ! he formal definition of a fluid T ! iscosity and its determinants: temperature, V concentration of dissolved
Biology 427 Biomechanics For this problem set assume that all biological materials are Hookean that is they have a linear stress strain relationship. Data Human mass = 100 kg Hobbit mass = 25 kg Bumblebee mass = 0.005 kg Human Achilles tendon length
Biology 427 Lecture 7. Strength and toughness of biological materials
Recap stress, strain, stiffness and strength of biomaterials: measures of material properties Strength revisited and the limits to the size of terrestrial vertebrates Energy relat
Welcome to Biology 427 Biomechanics 2008
Lecture 1: An introduction to Biomechanics: Jumping right in.
! hat's the course about? W ! ow is the course organized? H ! hat physics basics need I review? W ! umping right into it: the mechanics of ballist
Biology 427 Problem Set 2 Here are some interesting and useful data for this second problem set. You may not need all of this stuff. As usual, we have also provided you with another article for your insightful commentary. Raw data Peak human running
Biology 427 Biomechanics Lecture 5. Terrestrial locomotion II: mechanical analysis of gaits and jumpiness. Recap: gaits and ballistic walking When the Froude Number (V2/g L) is greater than 1, simple ballistic walking is no longer possible. The ju