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Published byBrian Hamilton Modified over 7 years ago
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Introduction to Biomechanics ISE789 Spring 2010 Dr. R. A. Wysk
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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
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Examples
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Flow of joint position from a camera
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The Arm
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Joint Replacement Design
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Arm and Humerus
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Design considerations Human body is a very complex system Bones are very strong mechanical members Self healing Can be very slippery
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Hip Implants What makes they of value? –Pain free –Ambulation –Short recovery
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Implants What are the down sides? –Cost –Infection –Repair
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Examples
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More examples
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So what can we do? Systematic approach New materials Better design Better surgical tools Efficiency Variance reduction
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An Elbow Joint
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Use a free-body diagram
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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
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Our diagram The equations for static equilibrium are: M = 0 F x = 0 F y = 0
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Our problem
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Hip Biomechanics
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