Validated thoracic vertebrae and costovertebral joints increase biofidelity of a human body model in hub impacts

Traffic Injury Prevention
Jazmine AiraF Scott Gayzik

Abstract

Objective: A recent emphasis on nontraditional seating and omnidirectional impact directions has motivated the need for deformable representation of the thoracic spine (T-spine) in human body models. The goal of this study was to develop and validate a deformable T-spine for the Global Human Body Models Consortium (GHBMC) M50-O (average male occupant) human model and to demonstrate improved biofidelity.Methods: Eleven functional spinal units (FSUs) were developed with deformable vertebrae (cortical and trabecular), spinal and costovertebral ligaments, and intervertebral discs. Material properties for all parts were obtained from the literature.FSUs were subjected to quasistatic loads per Panjabi et al. (1976) in 6 degrees of freedom. Stiffness values were calculated for each moment (Nm/°) and translational force (N/µm). Updated costovertebral (CV) joints of ribs 2, 6, and 10 were subjected to moments along 3 axes per Duprey et al. (2010). The response was optimized by maximum force and laxity in the ligaments. In both cases, updated models were compared to the baseline approach, which employed rigid bodies and joint-like behavior. The deformable T-spine and CV joints were integrated into the full M50-O model Ver. 5.0β and 2 ful...Continue Reading

References

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Aug 21, 2013·Computer Methods in Biomechanics and Biomedical Engineering·Matthew KindigDamien Subit
Mar 6, 2015·Annals of Biomedical Engineering·Nicholas A VavalleF Scott Gayzik
Jul 18, 2015·Journal of Biomechanics·Jason FormanTim Walilko
Mar 28, 2018·Traffic Injury Prevention·B GuleyupogluF S Gayzik
Oct 13, 2018·Annals of Biomedical Engineering·James P GaewskyJoel D Stitzel
Nov 20, 2018·Computer Methods in Biomechanics and Biomedical Engineering·Benedikt SchlagerHans-Joachim Wilke
Dec 14, 2018·Annals of Biomedical Engineering·Jeremy M SchapF Scott Gayzik

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