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Introduction to Biomechanics ISE789 Spring 2010 Dr. R. A. Wysk.

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Presentation on theme: "Introduction to Biomechanics ISE789 Spring 2010 Dr. R. A. Wysk."— Presentation transcript:

1 Introduction to Biomechanics ISE789 Spring 2010 Dr. R. A. Wysk

2 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

3 Examples

4 Flow of joint position from a camera

5 The Arm

6 Joint Replacement Design

7 Arm and Humerus

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11 Design considerations Human body is a very complex system Bones are very strong mechanical members Self healing Can be very slippery

12 Hip Implants What makes they of value? –Pain free –Ambulation –Short recovery

13 Implants What are the down sides? –Cost –Infection –Repair

14 Examples

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16 More examples

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21 So what can we do? Systematic approach New materials Better design Better surgical tools Efficiency Variance reduction

22 An Elbow Joint

23 Use a free-body diagram

24 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

25 Our diagram The  equations for static equilibrium are:  M = 0  F x = 0  F y = 0

26 Our problem

27 Hip Biomechanics


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