IMPACT SIMULATOR DESIGN AND MODELLING Dr. Kontulainen and Dr.Lanovaz College of Kinesiology

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IMPACT SIMULATOR DESIGN AND MODELLING Dr.
Kontulainen and Dr.LanovazCollege of Kinesiology

• Group 11
• Jon Aydt
• Yi Liu
• Devin Glennie
• Faculty Advisor
• James D. Johnston

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Problem

• The College of Kinesiology is currently
  researching risk factors which contribute to
  fractures of the distal radius in adolescent
  children.
• Distal radius fractures commonly occur during
  falls on the outstretched hand when external
  loads applied to the radius exceed the bone
  strength.
• Currently, there exists no suitable test
  apparatus for predicting the magnitude of
  external loads applied to the wrist during a fall.

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Project Objectives

1. Design a safe fall release apparatus to conduct
   fall tests of children during different
   scenarios.
2. Develop a mathematical model to correlate
   measured safe-fall data with predictions for
   forces experienced during a real fall.
3. Select an appropriate wireless tri-axial,
   accelerometer to be attached to test subjects
   during fall tests.

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• Conducted fall tests on October 3.

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Preliminary Testing

• Accelerometer Range 100Gs
• Safe Fall Height 5-10cm

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Preliminary Apparatus Design

• Brainstormed 5 apparatus designs.
• Dimensioned the Biomechanics Lab.

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Schedule

• October Early November
• Finish design of test apparatus and generate cost
  estimate.
• Perform stress analysis of test apparatus.
• Develop mass-spring models and Matlab program.
• November and December
• Conduct pilot tests of proposed fall scenarios.
• Analyze test data and adjust mass-spring models.
• Perform feasibility study for scaled model of
  testing apparatus.

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Schedule

• January
• Prepare appendices of final report.
• Write MatLab instruction manual.
• February
• Write and proofread final report.
• Prepare for final presentation.

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QUESTIONS?