Biomechanics - PowerPoint PPT Presentation

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Biomechanics

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'Biomechanics is the science that examines forces acting upon and within a ... Galileo Galilei, 1564-1642. William Harvey, 1578-1658. Ren Descartes, 1596-1650 ... – PowerPoint PPT presentation

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Title: Biomechanics


1
Biomechanics
  • applies mechanics to biology
  • physiological and medical applications are the
    main points in this course

2
Biomechanics
  • Biomechanics is the science that examines forces
    acting upon and within a biological structure and
    effects produced by such forces.
  • B.M.
    Nigg

3
Historical background
  • Leonardo da Vinci, 1452-1519
  • Andreas Vesalius, 1514-1564
  • Galileo Galilei, 1564-1642
  • William Harvey, 1578-1658
  • René Descartes, 1596-1650
  • Giovanni Alfonso Borelli, 1608-1679
  • Robert Boyle, 1627-1691
  • Robert Hooke, 1635-1703
  • Isac Newton, 1642-1727
  • Leonard Euler, 1707-1783
  • Thomas Young, 1773-1829
  • Jean Poiseuille, 1797-1869
  • Adolf Fick, 1829-1901
  • ....

4
Leonardo da Vinci
5
(No Transcript)
6
Andreas Vesalius
7
Giovanni Alfonso Borelli
8
The way of solving a Biomechanical problem
0. Description of the anatomy, the CAD-drawing.
  1. How does the construction work mechanically ?

Kinematics
Anatomy
Limitations
9
2. What about the loading ?
Equations of equilibrium (moments)
Equations of equilibrium (forces)
Outer forces
10
2. What about the loading?
Loading
Compression
Tension
Ligament
Bending
Cartilage
Loading
Compression
Tension
Bending
  • Internal forces

11
It is not obvious that the position follows
unambiguous from the loading
ONLY PASSIVE ELEMENTS The position is given from
the loading
WITH ACTIVE ELEMENTS The position can be
com- pletely different even if the loading is
the same
12
3. Constitutive relations
Mechanical properties of the most important
constituents of bone, muscles, tendons,
ligaments, cartilage etc.
STRESS
STRAIN
COMPACT BONE (APATITE AND COLLAGEN
STRESS
TENDON (COLLAGEN)
STRAIN
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