Battlefield Injury Mechanisms

Humans in Extreme Environments

Understanding the mechanisms of human response to high rate ballistic loading.  Develop experimental methods and computational techniques to understand the human response to ballistic loading.  Current research focuses include understanding the response of the brain and the body to ballistic loading conditions including accelerative loading conditions.  Experimental investigations in the response of the brain are designed to elucidate neuronal responses from mechanical loading at different rates.  Computational techniques are required to accurately represent the rate-dependent response of tissue to applied loading.

Principal Investigators: 

Christopher Hoppel,  christopher.p.hoppel.civ@mail.mil, (410) 278-8878;
Tusit Weerasooriya, tusit.weerasooriya@mail.mil, (410) 306-0969;
Sikhanda Satapathy, Sikhanda.S.Satapathy.civ@mail.mil, (410) 278-8565

Supporting Facilities:
Multi-Scale and Multi-Rate Experimental Mechanics Laboratory (APG)
The laboratory has developed numerous unique in situ experimental methods at different length-scales to explore the rate-dependent response of materials (including bio materials) using novel loading methods at different rates.  Response measurement diagnostics include wide-field, fluorescent, confocal, electron microscopy, macro/micro-DIC methods and micro-CT methods. We are also in the process of developing in situ X-ray diffraction microscopy (SAXS and WAXS) methods.  Mechanical loading devices include specially designed Hopkinson bars and other specialized loading devices to apply Army relevant loading to materials scaling from centimeters to sub-micrometers.

Understanding the Mechanisms of Traumatic Brain Injury (APG)

Develop in situ experimental methods to characterize the neuronal response to different rates of loading including ballistic loading.  Develop computational techniques to represent the electrical, mechanical, and chemical responses of the brain to stress waves applied to the body.

Principal Investigators: 

Christopher Hoppel, christopher.p.hoppel.civ@mail.mil, (410) 278-8878;
Tusit Weerasooriya, tusit.weerasooriya@mail.mil, (410) 306-0969;
Sikhanda Satapathy, Sikhanda.S.Satapathy.civ@mail.mil, (410) 278-8565

Computational Methods for Tissues (APG)

Develop numerical methods to capture hierarchy of tissue organization bridging length scales and multi-physics response.  Develop analysis tools to capture biovariability. Develop computational tools to seamlessly process imaging data, produce solid models, and discretize into robust computational models for analysis.

Principal Investigators: 

Sikhanda Satapathy, Sikhanda.S.Satapathy.civ@mail.mil, (410) 278-8565

Deformation and Failure Mechanisms for Army-Relevant Materials (APG)

Understanding the relationship between mechanical, electrical, and chemical response of materials at different length scales to mechanical loading with focus on rates experienced by Soldiers on the battlefield.  Developing in situ experimental methods and conducting investigations to identify associated micro-mechanisms through quantitative visualization.

Principal Investigators: 

Tusit Weerasooriya, tusit.weerasooriya@mail.mil, (410) 306-0969

Supporting Facilities:
Multi-Scale and Multi-Rate Experimental Mechanics Laboratory (APG)
The laboratory has developed many unique in-situ experimental methods at different length-scales to explore the rate-dependent response of materials (including bio materials) using novel loading methods at different rates. Response measuring diagnostics include wide-field, fluorescent, confocal, electron microscopy, macro/micro-DIC methods and micro-CT methods.  This lab is in the process of developing in situ X-ray diffraction microscopy (SAXS and WAXS) methods.  Mechanical loading devices include specially designed Hopkinson bars and other specialized loading devices to apply Army relevant loading to materials scaling from centimeters to sub-micrometers.

Enhanced Prediction of Skeletal Injury Risk Due to Under-Body Blast (UBB)

The Warrior Injury Assessment Manikin (WIAMan) project is developing a new, scientifically valid capability to assess the probability of skeletal injury to occupants of ground vehicles subjected to the effects of an under-body blast (UBB) event such as a Live-Fire test. The project will produce new biomechanics knowledge and an anthropomorphic test device (ATD) designed to have human-like response to vertical, high-energy, high-acceleration conditions. A vast amount of biomechanics test data can be leveraged for test purposes.

The WIAMan Accelerative Loading Fixture (ALF) at Aberdeen Proving Ground is designed to generate predictable and repeatable under-body blast loading conditions to simulated vehicle occupants, both for non-injurious and injurious testing. The ALF, with surrounding facilities at Fuse Range and EF-10, provides a unique biomechanics research and test capability for post-mortem human surrogate (PMHS) and anthropomorphic test device (ATD) experiments.

Principal Investigators: 

Mr. Randy Coates, randolph.s.coates.civ@mail.mil, (410) 278-3498

Equipment Available:
Accelerative Loading Fixture