Lateral Abdomen Force

 

The Lateral Abdomen Force tool in Metriks reports peak and time-history data of the resultant force in the oblique region between the iliac crest and ribcage. The forces are output by a contact force transducer. The risk of injury of the abdomen was developed from cadaver drop tests into rigid and padded arm rests by Walfisch et al. (1980). The force in the abdomen is one of the injury measures evaluated in the side impact of the ES-2re dummy. Metriks reports the risk of AIS3+ injury in the abdomen.

Outputs Example

Panel Descriptions
3D Representation of force transducers used for processing	Summary Tables with Risk of AIS 3+ Injury and Peak Resultant Force Information
Time-History Plot of resultant force in the left and right oblique	Injury Risk Curve for Resultant Force in the left and right oblique

Instrumentation Summary

Calculation Methods

Force transducers on the interior of left and right oblique abdomen flesh are included in the default instrumentation of the detailed occupant models. The force transducer outputs include solid and shell element force and moment contributions from each force transducer. The resultant force for each force transducer is plotted in Metriks.

1.Extract X, Y, and Z force from each force transducer output. Contact force transducer IDs can be offset in Human Body Model Settings but are not yet able to be manually modified.

2. Filter each trace individually. The default filter frequency can be modified in Calculation Settings

3. Calculate the resultant force.

  Injury Risk Calculation

 

Obtain risk of AIS3+ abdomen injury using the calculated maximum resultant force (kN) according to the following equation:

 

1. Walfisch, G., Fayon, C., Terriere, J., et al., “Designing of a Dummy’s Abdomen for Detecting Injuries in Side Impact Collisions,” 5th International IRCOBI Conference, 1980.