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Normalized frontal impact biofidelity kinematic corridors using post mortem human surrogates.

Mike W J Arun1, Prasannaah Hadagali1, Frank Pintar1

  • 1Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States.

Journal of the Mechanical Behavior of Biomedical Materials
|December 19, 2017
PubMed
Summary

This study provides normalized biofidelity corridors for human body models using postmortem human subject (PMHS) data. These validated corridors are crucial for evaluating the accuracy of both finite element human body models (FEHBM) and anthropomorphic test devices (ATDs).

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Area of Science:

  • Biomechanics
  • Computational Modeling
  • Injury Biomechanics

Background:

  • Finite element human body models (FEHBM) offer realistic human response prediction, increasingly replacing mechanical surrogates.
  • Validation of FEHBMs and Anthropomorphic Test Devices (ATDs) requires biofidelity corridors derived from postmortem human subject (PMHS) responses.
  • Standardized validation metrics are essential for advancing human body modeling in safety research.

Purpose of the Study:

  • To present normalized biofidelity corridors for key human body locations (head CG, T1, T12, sacrum) using PMHS frontal sled test data.
  • To establish validation criteria for both FEHBMs and ATDs based on experimental human subject responses.
  • To include head rotational accelerations and displacements in the biofidelity assessment.

Main Methods:

  • Utilized experimental data from four PMHS specimens subjected to frontal sled tests at low (3.6 m/s) and medium (6.9 m/s) velocities.
  • Normalized acceleration and displacement data using a mass-based technique to represent a mid-sized US population.
  • Generated average and +/- one standard deviation response corridors for kinematic validation.

Main Results:

  • Developed normalized biofidelity corridors for head CG, T1, T12, and sacrum linear accelerations.
  • Presented normalized head rotational accelerations and displacements.
  • The generated corridors provide a quantitative basis for evaluating model biofidelity.

Conclusions:

  • The presented normalized biofidelity corridors are essential for validating FEHBMs and ATDs.
  • These corridors facilitate more realistic human body response predictions in safety simulations.
  • This work supports the advancement of computational human body modeling for injury assessment.