Introduction to Biomechanics - PowerPoint

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					Introduction to Biomechanics

       ISE789
    Spring 2010
   Dr. R. A. Wysk
      What is Biomechanics?
• The process of describing, analyzing and
  assessing human motion
• Some focus on handicapped
  – Gate of motion
• Joints and joint replacement
  – Stable and sustainable
Examples
Flow of joint position from a camera
The Arm
Joint Replacement Design
Arm and Humerus
Design considerations


• Human body is a very complex system
• Bones are very strong mechanical
  members
• Self healing
• Can be very slippery
              Hip Implants
• What makes they of value?
  – Pain free
  – Ambulation
  – Short recovery
                Implants
• What are the down sides?
  – Cost
  – Infection
  – Repair
Examples
More examples
More examples
More examples
More examples
More examples
          So what can we do?
•   Systematic approach
•   New materials
•   Better design
•   Better surgical tools
•   Efficiency
•   Variance reduction
An Elbow Joint
Use a free-body diagram
         Free-body diagrams
• Shows all forces and kinematic points
  – Draw a representative free-body diagram
• Equilibrium mapping
  – Write the equations of static equilibrium
• Solve/analyze the system
              Our diagram
The equations for static equilibrium are:

SM =0
S Fx = 0
S Fy = 0
Our problem
Hip Biomechanics

				
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