Impact of complex blast waves on the human head: a computational study.

Area of Science:

• Biomechanics
• Trauma research
• Computational modeling

Background:

• Limited research exists on head injuries from complex blast impacts.
• Previous studies focused on single planar blast waves.
• Complex blasts involve multiple simultaneous or consecutive impacts, potentially causing more severe injuries.

Purpose of the Study:

• To demonstrate a head-helmet model for analyzing complex blast impacts.
• To validate the model against existing literature.
• To investigate the mechanics of blast wave interaction with the head.

Main Methods:

• Utilized a head-helmet model in Abaqus(TM) for blast impact analysis.
• Validated the computational model against published studies.
• Simulated various complex blast scenarios (consecutive, concurrent).

Main Results:

• The skull transmits blast impacts, leading to high intracranial pressures (ICPs).
• Blast waves can enter helmets at the sides and impact the rear.
• Consecutive frontal blasts caused higher ICPs than single blasts; unhelmeted heads exceeded injury thresholds.
• Concurrent front/side blasts resulted in lower ICPs than consecutive blasts.

Conclusions:

• Recommendations for enhanced helmet protection at the sides and rear using foam pads.
• Complex blast scenarios, particularly consecutive ones, increase brain injury severity.
• Understanding blast wave-head interaction mechanics is crucial for mitigating head injuries.