Abdominal injury analysis of a 6-year-old pedestrian finite element model in lateral impact

2016 ◽  
Vol 9 (1) ◽  
pp. 85 ◽  
Author(s):  
Wenle Lv ◽  
June Ruan ◽  
Haiyan Li ◽  
Shihai Cui ◽  
Lijuan He ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Abdominal Injury ◽  
Lateral Impact ◽  
Injury Analysis

Lateral Impact Validation of a Probabilistic Statistical Shape Finite Element Model of the Head and Neck

2013 ◽  
Author(s):  
Travis Eliason ◽  
Loren Francis ◽  
Todd Bredbenner ◽  
Brian Stemper ◽  
Dan Nicolella ◽  
...  
Keyword(s):  
Finite Element ◽  
Cervical Spine ◽  
Finite Element Model ◽  
Element Model ◽  
Cumulative Distribution ◽  
High Fidelity ◽  
Lateral Impact ◽  
Injury Prediction ◽  
Statistical Shape ◽  
Probabilistic Response

Injury prediction and mitigation are common overarching goals of modern biomechanical research. This research is fundamental to preventing and mitigating injuries sustained by those exposed to dangerous conditions including but not limited to occupational hazards, warfighter risks, automotive accidents, etc. Unlike traditional mechanical system research, biological systems are difficult and costly to test resulting in a need for robust and accurate numerical simulations. Models of the cervical spine are complex, nonlinear systems that must accurately model dynamic loading, large deflections, elastic, and viscoelastic behavior. In addition to individual complexities, population variance in both material properties and shape must be taken into account for accurate injury prediction. As part of a hierarchical validation and verification (V&V) methodology, lateral impact cadaveric cervical spine experiments were compared to a high fidelity statistical shape finite element model (SSFEM) of the cervical spine and head. Specimens were mounted to a sled and accelerated using a pendulum impact with 1, 2, and 3 m/s impact velocities. The kinematics of the head and all individual cervical vertebrae were recorded with a Vicon motion capture system along with sled acceleration data. Sled accelerations were used as input boundary conditions for the probabilistic study using the SSFEM. Head and vertebrae rotations between the experimental and model responses were then compared. A latin hypercube probabilistic analysis was performed for each impact velocity to determine the probabilistic response of each rotation metric. When comparing these responses, both the average and variation must be taken into consideration. This is accomplished using a quantitative validation metric based on the area between the cumulative distribution functions (CDF) of experimental response and the computed probabilistic response. Our results showed a very good match between the model and experiment at the higher impact velocities and a slightly stiffer response at lower rates. These results are consistent with previous validation studies performed with this SSFEM. By expanding the validation data set with lateral impact loading, greater confidence in the model is obtained under different loading modes. This confidence allows the model to be used for probability of injury predictions as well as to identify important system variables in preventing injuries. High fidelity numeric modeling allows for rapid and cost effective assessment of hazardous loading conditions and safety equipment compared to experimental modeling. The knowledge gained from these modeling studies is fundamental and necessary for safe and effective design and injury mitigation.

Development of a detailed human neck finite element model and injury risk curves under lateral impact

2021 ◽  
Vol 116 ◽  
pp. 104318
Author(s):  
Frank Meyer ◽  
John Humm ◽  
Narayan Yoganandan ◽  
Aleksander Leszczynski ◽  
Nicolas Bourdet ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Injury Risk ◽  
Element Model ◽  
Lateral Impact ◽  
Risk Curves

Lateral Impact Validation of a Geometrically Accurate Full Body Finite Element Model for Blunt Injury Prediction

2012 ◽  
Vol 41 (3) ◽  
pp. 497-512 ◽  
Author(s):  
Nicholas A. Vavalle ◽  
Daniel P. Moreno ◽  
Ashley C. Rhyne ◽  
Joel D. Stitzel ◽  
F. Scott Gayzik
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Blunt Injury ◽  
Lateral Impact ◽  
Injury Prediction ◽  
Full Body

The Effect of Impactor Location on the Validation of a Full Body Finite Element Model in Two Loading Cases

2012 ◽  
Author(s):  
Nicholas A. Vavalle ◽  
Daniel P. Moreno ◽  
Joel D. Stitzel ◽  
F. Scott Gayzik
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Complex Loading ◽  
Element Model ◽  
Sensitivity Study ◽  
Oblique Impact ◽  
Lateral Impact ◽  
Element Analysis ◽  
The Right ◽  
Full Body

Finite element analysis (FEA) is a tool used by many in the injury biomechanics field. FEA allows researchers to study the stresses and strains in complex loading scenarios that would be impossible to determine experimentally. A vital step toward ensuring accurate results is validation of the finite element model (FEM), which is often based on matching model results to experimental results. While care is taken in performing experiments, there are still sources of variance in empirical results like experimental error and cadaver variation. In order to mimic these, location variations of two validation cases were studied, an oblique impact to the right thoracoabdominal region and a lateral impact to the right shoulder. Five locations were studied for each case, the nominal and four variations. The object of this study was to determine model robustness, conduct a sensitivity study of the model, and to simulate experimental subject variation without the use of subject-specific models. This study utilizes the Global Human Body Models Consortium (GHBMC) midsized male model. The model reflects a global effort to develop a set of state-of-the-art full body finite element models.

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