IMPACT SIMULATOR DESIGN AND MODELLING

Dr. Kontulainen and Dr.LanovazCollege of Kinesiology

Group 11:Jon AydtYi LiuDevin Glennie

Faculty Advisor:James D. Johnston

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.

Project Objectives1. 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.

Conducted fall tests on October 3.

Preliminary Testing

Accelerometer Range: ±100G’sSafe Fall Height: 5-10cm

Preliminary Apparatus Design

•Brainstormed 5 apparatus designs.

•Dimensioned the Biomechanics Lab.

ScheduleOctober – 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.

ScheduleJanuary•Prepare appendices of final report.•Write MatLab instruction manual.

February•Write and proofread final report.•Prepare for final presentation.

QUESTIONS?