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Lower Extremity Response to Blast Loading: A Computational Study.

Aman Vikram1, Anoop Chawla1, Sudipto Mukherjee1

  • 1Department of Mechanical Engineering, Indian Institute of Technology, Delhi 110016, India.

Journal of Biomechanical Engineering
|December 13, 2022
PubMed
Summary
This summary is machine-generated.

This study simulated blast impacts on the Total Human Model for Safety (THUMS) lower extremity. The finite element model accurately predicted foot injuries from landmine explosions, showing localized damage to the hindfoot and midfoot.

Keywords:
antipersonnel land mine explosionblastlower extremityunderbody blast

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Area of Science:

  • Biomechanics
  • Computational modeling
  • Injury analysis

Background:

  • Blast injuries pose a significant threat, particularly to military personnel.
  • Understanding lower extremity injury mechanisms is crucial for developing protective measures.
  • Finite element models offer a way to simulate complex injury scenarios.

Purpose of the Study:

  • To investigate the response of the Total Human Model for Safety (THUMS) lower extremity finite element model under blast loading.
  • To assess the model's accuracy in simulating underbody blast (UBB) and landmine explosions.
  • To predict injury patterns and severity in the lower extremities due to blast events.

Main Methods:

  • Utilized the THUMS lower extremity finite element model.
  • Simulated underbody blast (UBB) loading with varying floorplate impact velocities.
  • Modeled antipersonnel landmine explosions to assess nearfield blast effects.
  • Validated numerical responses against available experimental data using Correlation and Analysis (CORA) ratings.
  • Quantified bone damage by measuring percentage change in mass and element erosion.

Main Results:

  • The THUMS model demonstrated good correlation with experimental data for UBB loading.
  • The model remained stable in nearfield blast simulations but was sensitive to threat definition.
  • Predicted lower extremity injury, specifically to the hindfoot and midfoot, when detonation occurred below the heel.
  • Observed minimal damage to the forefoot, aligning with existing literature findings.

Conclusions:

  • The THUMS lower extremity finite element model is a viable tool for investigating blast-induced injuries.
  • The model accurately predicts injury localization in the foot, particularly the hindfoot and midfoot, under specific blast scenarios.
  • Further refinement of threat definition in simulations can enhance prediction accuracy for lower extremity blast injuries.