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Crash Occupant Modeling

UMTRI researchers have considerable expertise developing and using computational crash-victim-simulation models such as MADYMO to investigate occupant kinetics and kinematics in motor-vehicle crashes. These simulations are used to assess changes in crash dummy design and dynamic performance, to investigate the causes and mechanisms of different types of injuries, and to establish appropriate test conditions for biomechanical testing in the laboratory. LS-DYNA finite element analysis software is also used to study the effects of different occupant loading conditions on tissue stresses and strains. For example, UMTRI researchers developed a finite element model (FEM) of the six-month-old infant head to estimate infant head impact response and injury tolerance using reconstructions of real-world airbag-deployment infant head injury scenarios. Currently, it is being used to study the effects of lower-extremity muscle tension on the risk of knee-thigh-hip injuries in frontal crashes of airbag/knee-bolster equipped vehicles.

Recent Publications

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Does Unbelted Safety Requirement Affect Protection For Belted Occupants?
Hu J, Klinich KD, Manary MA, Flannagan CA, Narayanaswamy P, Reed MP, Andreen M, Neal M, Lin CH

journal article IN: Traffic Injury Prevention

Abstract OBJECTIVE: Federal regulations in the United States require vehicles to meet occupant performance requirements with unbelted...

A statistical human rib cage geometry model accounting for variations by age, sex, stature and body mass index 
Xiangnan Shi, Libo Cao, Matthew P. Reed, Jonathan D. Rupp, Carrie N. Hoff, Jingwen Hu

journal article IN: Journal of Biomechanics Volume 47, Issue 10, 18 July 2014, Pages 2277–2285

In this study, we developed a statistical rib cage geometry model accounting for variations by age, sex, stature and body mass index (...

Development, validation, and application of a parametric finite element femur model
 Katelyn F. Klein, Jonathan D. Rupp, Jingwen Hu

conference paper IN:  Injury Biomechanics Symposium, May 18-20, 2014, Columbus, Ohio

Older, obese, and female occupants have higher risk of serious lower-extremity injuries in frontal crashes. Optimizing vehicle...

Effect of frozen storage on dynamic tensile properties of human placenta
Kathleen D. Klinich, Carl S. Miller, Jingwen Hu, Giseli M. Nazmi, Mark D. Pearlman, Lawrence W. Schneider, Jonathan D. Rupp.

journal article IN: Journal of Biomechanical Engineering. Vol. 134, no. 3 (Mar. 2012), 034501.

Dynamic mechanical properties of placenta tissue are needed to develop computational models of pregnant occupants for use in designing...

A stochastic visco-hyperelasitc model of human placenta tissue for finite element crash simulations
Jingwen Hu, Kathleen D. Klinich, Carl S. Miller, Jonathan D. Rupp, Giseli Nazmi, Mark D. Pearlman, and Lawrence W. Schneider.

journal article IN: Annals of Biomedical Engineering. Vol. 39, no. 3 (2011), p. 1074-1083.

Placental abruption is the most common cause of fetal deaths in motor-vehicle crashes, but studies on the mechanical properties of...