Abstract
The modeling of human body biomechanics resulting from blast exposure poses great challenges because of the complex geometry and the substantial material heterogeneity. We developed a detailed human body finite element model representing both the geometry and the materials realistically. The model includes the detailed head (face, skull, brain and spinal cord), the neck, the skeleton, air cavities (lungs) and the tissues. Hence, it can be used to properly model the stress wave propagation in the human body subjected to blast loading. The blast loading on the human was generated from a simulated C4 explosion. We used the highly scalable solvers in the multi-physics code CoBi for both the blast simulation and the human body biomechanics. The meshes generated for these simulations are of good quality so that relatively large time-step sizes can be used without resorting to artificial time scaling treatments. The coupled gas dynamics and biomechanics solutions were validated against the shock tube test data. The human body models were used to conduct parametric simulations to find the biomechanical response and the brain injury mechanism due to blasts impacting the human body. Under the same blast loading condition, we showed the importance of inclusion of the whole body.
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Acknowledgements
This work has resulted from the research project “Physics and Physiology Based Human Body Model of Blast Injury and Protection” (Contract # W81XWH-14-C-0045) managed by the DoD Blast Injury Research Program Coordinating Office. The authors would like to express their appreciation to the DoD Congressionally Directed Medical Research Programs (Contract # W81XWH-09-2-0168) for supporting the initial work. The content included in this work does not necessarily reflect the position or policy of the US government. The authors are very grateful to the reviewers and Amit Bagchi for their careful and meticulous reading of the paper. The reviews were helpful to finalize the manuscript. The authors would like to kindly acknowledge them.
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Communicated by O. Petel and S. Ouellet.
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Tan, X.G., Przekwas, A.J. & Gupta, R.K. Computational modeling of blast wave interaction with a human body and assessment of traumatic brain injury. Shock Waves 27, 889–904 (2017). https://doi.org/10.1007/s00193-017-0740-x
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DOI: https://doi.org/10.1007/s00193-017-0740-x