Development and Validation of Subject-Specific Finite Element Models for Blunt Trauma Study
- 1 April 2008
- journal article
- Published by ASME International in Journal of Biomechanical Engineering
- Vol. 130 (2), 021022
- https://doi.org/10.1115/1.2898723
Abstract
This study developed and validated finite element (FE) models of swine and human thoraxes and abdomens that had subject-specific anatomies and could accurately and efficiently predict body responses to blunt impacts. Anatomies of the rib cage, torso walls, thoracic, and abdominal organs were reconstructed from X-ray computed tomography (CT) images and extracted into geometries to build FE meshes. The rib cage was modeled as an inhomogeneous beam structure with geometry and bone material parameters determined directly from CT images. Meshes of soft components were generated by mapping structured mesh templates representative of organ topologies onto the geometries. The swine models were developed from and validated by 30 animal tests in which blunt insults were applied to swine subjects and CT images, chest wall motions, lung pressures, and pathological data were acquired. A comparison of the FE calculations of animal responses and experimental measurements showed a good agreement. The errors in calculated response time traces were within 10% for most tests. Calculated peak responses showed strong correlations with the experimental values. The stress concentration inside the ribs, lungs, and livers produced by FE simulations also compared favorably to the injury locations. A human FE model was developed from CT images from the Visible Human project and was scaled to simulate historical frontal and side post mortem human subject (PMHS) impact tests. The calculated chest deformation also showed a good agreement with the measurements. The models developed in this study can be of great value for studying blunt thoracic and abdominal trauma and for designing injury prevention techniques, equipments, and devices.Keywords
This publication has 37 references indexed in Scilit:
- A model of blast overpressure injury to the lungJournal of Biomechanics, 1996
- Automatic generation of hexahedral finite element meshesComputer Aided Geometric Design, 1995
- Progress of Research on Impact BiomechanicsJournal of Biomechanical Engineering, 1993
- A model for studies of the deformable rib cageJournal of Biomechanics, 1992
- Non-homogeneous analysis of three-dimensional transmural finite deformation in canine ventricular myocardiumJournal of Biomechanics, 1991
- Orthotic Stabilization of Thoracolumbar InjuriesSpine, 1990
- The Biomechanical Response of the Lower Abdomen to Belt Restraint LoadingThe Journal of Trauma and Acute Care Surgery, 1989
- A Hypothesis on the Mechanism of Trauma of Lung Tissue Subjected to Impact LoadJournal of Biomechanical Engineering, 1988
- A Finite Element Model for Macroscopic Deformation of the LungJournal of Biomechanical Engineering, 1980
- Finite element analysis of the human thoraxJournal of Biomechanics, 1977