Physical surrogate leg to evaluate blast mine injury

Area of Science:

• Biomechanics
• Trauma research
• Materials science

Background:

• Antipersonnel blast landmines present a significant global threat, frequently causing severe lower extremity injuries and amputations.
• Existing methods for evaluating protective gear and predicting blast injuries are limited in their ability to accurately assess outcomes.
• There is a critical need for advanced injury prediction models and effective protection strategies for blast-exposed individuals.

Purpose of the Study:

• To develop and validate a physical surrogate lower leg model for evaluating blast injury.
• To assess the efficacy of biofidelic and frangible materials in simulating human tissue response to blast loading.
• To identify key injury metrics for predicting the severity of blast-induced trauma.

Main Methods:

• Development of a 50th percentile physical surrogate lower leg incorporating realistic load transmission pathways.
• Evaluation and selection of biofidelic and frangible materials based on high deformation rate properties.
• Experimental blast testing of the surrogate leg to predict injury outcomes.
• Analysis of post-test examination and tissue damage for injury evaluation.

Main Results:

• The surrogate leg model successfully simulated predicted leg injuries consistent with experimental blast testing data.
• Post-test examination of tissue damage emerged as the most reliable method for injury outcome prediction.
• The evaluation method based on tissue damage sensitivity to loading conditions surpassed existing approaches.

Conclusions:

• The severity of calcaneal fracture is the primary determinant of serious injury in blast events.
• Future protective equipment development should prioritize mitigating calcaneal fractures.
• The developed surrogate leg model and evaluation methodology offer a promising approach for advancing blast injury research.