SLIDE 1:
NHTSA CIREN team PowerPoint presentation - april 2002


SLIDE 2:
SIMon
Simulated Injury Monitor
A next generation (G2) human injury assessment tool


SLIDE 3:
SIMon Evaluates injury potential by:

- Directly imposing crash dummy responses on body-region-specific finite element (FE) models

- Utilizing biomechanically-based injury measures


SLIDE 4:
<flowchart>
Development of SIMon Concept


SLIDE 5:
SIMon Heat Injury Assessment:
SIMon uses biomechanical measures and dynamic head responses from crash tests to assess head injury 

SLIDE 6:
Instrumentation
Standard Nine-Accelerometer Package (NAP) provides full 3-D kinematic dummy head response


SLIDE 7:
Instrumented Crash-Test Dummies
Provide raw NAP data for SIMon Head Injury Assessment

SLIDE 8:
Raw NAP Data
Nine acceleration-time histories are input to SIMon


SLIDE 9:
SIMon Processes NAP Data
To drive head model


SLIDE 10:
SIMon Generates Loading
Applied to FE model of the head to calculate biomechanical injury measures


SLIDE 11:
SIMon Produces an Injury Summary
Based on three types of head injury mechanisms:
                                                            - - Diffuse axonal and microvascular injuries, tracked using a
Cumulative Strain Damage Measure (CSDM)

- Focal lesions occuring in regions of extreme low pressure, tracked by the Dilatation Damage Measure (DDM)

- Acute subdural hematoma reflecting relative tissue displacement, given by Relative Motion Damage Measure (RMDM)





SLIDE 12:
Sample SIMon Procedure
Step One:  Select the Dummy Used


SLIDE 13:
Step Two:  Select Body Region


SLIDE 14:
Step Three:  Add or select test


SLIDE 15:
Step Four:  Calculate Dummy Head Response


SLIDE 16:
Step Five:  Assess Brain Injury


SLIDE 17:
Potential Applications
SIMon can be used for injury assessment of other body regions, and can be applied to tests utilizing crash dummies of any size