Thoracic response targets for a computational model: A hierarchical approach to assess the biofidelity of a 50th-percentile occupant male finite element model

Poulard, David; Kent, Richard W.; Kindig, Matthew W.; Li, Zuoping; Subit, Damien

doi:10.1016/j.jmbbm.2015.01.017

Cited by 34 publications

(19 citation statements)

References 20 publications

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“…The total number of elements was reduced to 354,000, including 205,000 rigid elements and 149,000 deformable elements, compared to the detailed M50-O, which has 2.2 million. The resulting components of the model are shown in Table A1 (see online supplement), organized by body structure, and the uniaxial compression tests The simplified model denuded rib loading simulations were completed on the M50-OS, compared to experimental data (Kindig et al 2013;Poulard et al 2014) and the M50-O. The overall response showed good agreement with the experimental corridors and closely followed the response of the M50-O (see Figure A1).…”

Section: Resultsmentioning

confidence: 71%

“…The simplified model rib cage was subjected to denuded rib point-loading simulations at 7 locations on the rib cage. The methods follow those of Kindig et al (2013) and Poulard et al (2014), who performed a similar validation of the M50-O. Because the rib meshes were altered, this work was completed on the M50-OS to ensure biofidelity and demonstrate a consistent response, despite the change in mesh density to a coarser mesh.…”

Section: Methodsmentioning

confidence: 99%

“…Because the rib meshes were altered, this work was completed on the M50-OS to ensure biofidelity and demonstrate a consistent response, despite the change in mesh density to a coarser mesh. An elastic sphere and rigid plate setup was used as shown in the bottom right of Figure A1 (see online supplement; Poulard et al 2014). The impactor's normal direction was such that it was perpendicular to the sphere and it translated inward, causing rib deformation at a constant, quasistatic rate throughout the simulations.…”

Section: Methodsmentioning

confidence: 99%

“…Cross-sectional planes were defined to investigate neck forces (White et al 2015). The ribs were tested in a hierarchical fashion (Kindig et al 2015;Poulard et al 2014) under anterior-posterior bending loads, and the effect of cortical thickness and material properties were evaluated (Li, Kindig, Kerrigan, et al 2010;Li, Kindig, Subit, and Kent 2010). A new cortical thickness mapping technique was applied to the coxal bone from CT images and the effects of posture on hip injury tolerance were analyzed (Kim et al 2012;Yue et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Development of a Computationally Efficient Full Human Body Finite Element Model

Schwartz

Guleyupoglu

Koya

et al. 2015

Traffic Injury Prevention

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Introduction:A simplified and computationally efficient human body finite element model is presented. The model complements the Global Human Body Models Consortium (GHBMC) detailed 50th percentile occupant (M50-O) by providing kinematic and kinetic data with a significantly reduced run time using the same body habitus.Methods: The simplified occupant model (M50-OS) was developed using the same source geometry as the M50-O. Though some meshed components were preserved, the total element count was reduced by remeshing, homogenizing, or in some cases omitting structures that are explicitly contained in the M50-O. Bones are included as rigid bodies, with the exception of the ribs, which are deformable but were remeshed to a coarser element density than the M50-O. Material models for all deformable components were drawn from the biomechanics literature. Kinematic joints were implemented at major articulations (shoulder, elbow, wrist, hip, knee, and ankle) with moment vs. angle relationships from the literature included for the knee and ankle. The brain of the detailed model was inserted within the skull of the simplified model, and kinematics and strain patterns are compared.Results: The M50-OS model has 11 contacts and 354,000 elements; in contrast, the M50-O model has 447 contacts and 2.2 million elements. The model can be repositioned without requiring simulation. Thirteen validation and robustness simulations were completed. This included denuded rib compression at 7 discrete sites, 5 rigid body impacts, and one sled simulation. Denuded tests showed a good match to the experimental data of force vs. deflection slopes. The frontal rigid chest impact simulation produced a peak force and deflection within the corridor of 4.63 kN and 31.2%, respectively. Similar results vs. experimental data (peak forces of 5.19 and 8.71 kN) were found for an abdominal bar impact and lateral sled test, respectively. A lateral plate impact at 12 m/s exhibited a peak of roughly 20 kN (due to stiff foam used around the shoulder) but a more biofidelic response immediately afterward, plateauing at 9 kN at 12 ms. Results from a frontal sled simulation showed that reaction forces and kinematic trends matched experimental results well. The robustness test demonstrated that peak femur loads were nearly identical to the M50-O model. Use of the detailed model brain within the simplified model demonstrated a paradigm for using the M50-OS to leverage aspects of the M50-O. Strain patterns for the 2 models showed consistent patterns but greater strains in the detailed model, with deviations thought to be the result of slightly different kinematics between models. The M50-OS with the deformable skull and brain exhibited a run time 4.75 faster than the M50-O on the same hardware.Conclusions: The simplified GHBMC model is intended to complement rather than replace the detailed M50-O model. It exhibited, on average, a 35-fold reduction in run time for a set of rigid impacts. The model can be used in a modular fashion with the M50-O and more broadly can...

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Section: Resultsmentioning

confidence: 71%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a Computationally Efficient Full Human Body Finite Element Model

Schwartz

Guleyupoglu

Koya

et al. 2015

Traffic Injury Prevention

View full text Add to dashboard Cite

show abstract

“…The M50-P model has similar material properties as the M50-O model. The M50-O model’s main body regions were independently validated 30–45 and the whole body model was validated in various occupant loading scenarios. 16,28,46–49 The meshes and material properties of the M50-P model’s boney structures were almost identical to the M50-O’s model.…”

Section: Methodsmentioning

confidence: 99%

A detailed finite element model of a mid-sized male for the investigation of traffic pedestrian accidents

Grindle

Pak

Guleyupoglu

et al. 2020

Proc Inst Mech Eng H

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The pedestrian is one of the most vulnerable road users and comprises approximately 23% of the road crash-related fatalities in the world. To protect pedestrians during Car-to-Pedestrian Collisions (CPC), subsystem impact tests are used in regulations. These tests provide insight but cannot characterize the complex vehicle-pedestrian interaction. The main purpose of this study was to develop and validate a detailed pedestrian Finite Element (FE) model corresponding to a 50th percentile male to predict CPC induced injuries. The model geometry was reconstructed using a multi-modality protocol from medical images and exterior scan data corresponding to a mid-sized male volunteer. To investigate injury response, this model included internal organs, muscles and vessels. The lower extremity, shoulder and upper body of the model were validated against Post Mortem Human Surrogate (PMHS) test data in valgus bending, and lateral/anterior-lateral blunt impacts, respectively. The whole-body pedestrian model was validated in CPC simulations using a mid-sized sedan and simplified generic vehicles bucks and previously unpublished PMHS coronal knee angle data. In the component validations, the responses of the FE model were mostly within PMHS test corridors and in whole body validations the kinematic and injury responses predicted by the model showed similar trends to PMHS test data. Overall, the detailed model showed higher biofidelity, especially in the upper body regions, compared to a previously reported simplified pedestrian model, which recommends using it in future pedestrian automotive safety research.

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Biomechanical response of human rib cage to cardiopulmonary resuscitation maneuvers: Effects of the compression location

Suazo

Herrero

Fortuny

et al. 2022

Numer Methods Biomed Eng

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The biomechanical response of a human rib cage to cardiopulmonary resuscitation maneuvers was investigated by means of finite element simulations. We analyzed the effect of the location where the force was applied on the achieved compression depths and stress levels experienced by the breastbone and ribs. For compression locations on the breastbone, a caudal shift of the application area toward the breastbone tip resulted in a 17% reduction of the force required to achieve a target 5 cm compression depth. We found that the use of compression regions located on the costal cartilages would involve higher risk of rib fractures.

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Thoracic response targets for a computational model: A hierarchical approach to assess the biofidelity of a 50th-percentile occupant male finite element model

Cited by 34 publications

References 20 publications

Development of a Computationally Efficient Full Human Body Finite Element Model

Development of a Computationally Efficient Full Human Body Finite Element Model

A detailed finite element model of a mid-sized male for the investigation of traffic pedestrian accidents

Biomechanical response of human rib cage to cardiopulmonary resuscitation maneuvers: Effects of the compression location

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