Comput Methods Programs Biomed - Anthropometric dependence of the response of a thorax FE model under high speed loading: validation and real world accident replication.

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Resumo

Finite element analysis is frequently used in several fields such as automotive simulations or biomechanics. It helps researchers and engineers to understand the mechanical behaviour of complex structures. The development of computer science brought the possibility to develop realistic computational models which can behave like physical ones, avoiding the difficulties and costs of experimental tests. In the framework of biomechanics, lots of FE models have been developed in the last few decades, enabling the investigation of the behaviour of the human body submitted to heavy damage such as in road traffic accidents or in ballistic impact. In both cases, the thorax/abdomen/pelvis system is frequently injured. The understanding of the behaviour of this complex system is of extreme importance. In order to explore the dynamic response of this system to impact loading, a finite element model of the human thorax/abdomen/pelvis system has, therefore, been developed including the main organs: heart, lungs, kidneys, liver, spleen, the skeleton (with vertebrae, intervertebral discs, ribs), stomach, intestines, muscles, and skin. The FE model is based on a 3D reconstruction, which has been made from medical records of anonymous patients, who have had medical scans with no relation to the present study. Several scans have been analyzed, and specific attention has been paid to the anthropometry of the reconstructed model, which can be considered as a 50th percentile male model. The biometric parameters and laws have been implemented in the dynamic FE code (Radioss, Altair Hyperworks 11?) used for dynamic simulations. Then the 50th percentile model was validated against experimental data available in the literature, in terms of deflection, force, whose curve must be in experimental corridors. However, for other anthropometries (small male or large male models) question about the validation and results of numerical accident replications can be raised.

Resumo Limpo

finit element analysi frequent use sever field automot simul biomechan help research engin understand mechan behaviour complex structur develop comput scienc brought possibl develop realist comput model can behav like physic one avoid difficulti cost experiment test framework biomechan lot fe model develop last decad enabl investig behaviour human bodi submit heavi damag road traffic accid ballist impact case thoraxabdomenpelvi system frequent injur understand behaviour complex system extrem import order explor dynam respons system impact load finit element model human thoraxabdomenpelvi system therefor develop includ main organ heart lung kidney liver spleen skeleton vertebra intervertebr disc rib stomach intestin muscl skin fe model base d reconstruct made medic record anonym patient medic scan relat present studi sever scan analyz specif attent paid anthropometri reconstruct model can consid th percentil male model biometr paramet law implement dynam fe code radioss altair hyperwork use dynam simul th percentil model valid experiment data avail literatur term deflect forc whose curv must experiment corridor howev anthropometri small male larg male model question valid result numer accid replic can rais

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