Finite Element Modeling of Direct Head Impact

Ruan, Jesse; Khalil, Tawfik B.; King, Albert I.

doi:10.4271/933114

Cited by 106 publications

(54 citation statements)

References 5 publications

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“…and to investigate the protection effect of safety countermeasures (e.g. [16][17][18][19][20][21]). These FE model-predicted internal responses require a confirmed injury mechanism and accurate tissue-level injury thresholds to properly predict the location and severity of brain injuries.…”

Section: Introductionmentioning

confidence: 99%

Investigation of brain contusion mechanism and threshold by combining finite element analysis with in vivo histology data

Mao

Yang

2011

Numer Methods Biomed Eng

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SUMMARYA previously validated, highly detailed three-dimensional finite element (FE) rat brain model was used to correlate FE model-predicted intracranial responses with experimentally measured brain contusions. In the published in vivo experimental study, the animals were injured via a controlled cortical impact device at two different severities and the location and volume of contusion measured at 24 h post injury. Brain internal responses, including the maximum principal strain (MPS), maximum shear strain (MSS), shear strain (SS) in the coronal plane, strain energy density (SED), and intracranial pressure (ICP), were investigated through FE simulations. Distributions of MPS, MSS, and SED were comparable with the shapes of contusion observed experimentally. However, the regions with high positive ICP were not found to correlate with the regions of brain contusion. Locations of high SS were in the vicinity of the experimental contusion region, but the shallow shape of the SS distribution differed greatly from contusion observed experimentally. This study suggests that MPS, MSS, and SED are candidate injury mechanisms for brain contusion, and the corresponding threshold for predicting the contusion volume measured at 24 h post injury is 0.265 MPS, 0.281 MSS, or 1.72E−5 (J/mm 3 ) SED based on the current FE model.

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Section: Introductionmentioning

confidence: 99%

Investigation of brain contusion mechanism and threshold by combining finite element analysis with in vivo histology data

Mao

Yang

2011

Numer Methods Biomed Eng

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“…Since the neck was excluded in this simulation, a free-boundary condition was applied to the head-neck joint. This constraint is justified by the findings of Willinger et al (1999) and Ruan et al (1993) who showed that the neck does not influence the kinematic head response during the pulse duration. The impact was delivered by a pendulum along the axis inclined at about 45°to the Frankfort plane in midsagittal plane (Fig.…”

Section: Frontal Pendulum Impact Simulationmentioning

confidence: 85%

“…Relative movement of brain inside the skull, mainly caused by its inertia, would cause vascular injury on the connecting vessels and also may induce a negative pressure in subarachnoidal space, which result in axonal injuries. These understanding of basic injury mechanisms of human head-neck complex, however, are quite limited to some extent and many studies are under going both experimentally (Nahum, 1977;Bandak, 1996;Donnelly, 1997) and analytically (Claessens, 1997;Willinger, 1999;Ruan, 1993;Zhou, 1995;Zhou, 1994;Bandak, 1994;Kim, 1998;Voo, 1996). Recently numerical simulations, especially using the finite element method, have been utilized to investigate the hypothetical theories based on experiments and clinical findings.…”

Section: Introductionmentioning

confidence: 99%

Numerical human head model for traumatic injury assessment

Choi

2001

KSME International Journal

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“…The three-dimensional carpal tunnel had a 19.7 mm major diameter, a 9.7 mm minor diameter, and was 30 mm in length (Figure 3.) Visco-elastic material properties from the literature [4] were applied as baseline conditions for the nerve and tendons. Shear modulus (G) was estimated by Equation (1).…”

Section: Methodsmentioning

confidence: 99%

A fluid-immersed multi-body contact finite element formulation for median nerve stress in the carpal tunnel

Ko¹,

Brown

2007

Computer Methods in Biomechanics and Biomedical Engineering

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Carpal tunnel syndrome (CTS) is among the most important of the family of musculoskeletal disorders caused by chronic peripheral nerve compression. Despite the large body of research in many disciplinary areas aimed at reducing CTS incidence and/or severity, means for objective characterization of the biomechanical insult directly responsible for the disorder have received little attention.In this research, anatomical image-based human carpal tunnel finite element (FE) models were constructed to enable study of median nerve mechanical insult. The formulation included largedeformation multi-body contact between the nerve, the nine digital flexor tendons, and the carpal tunnel boundary. These contact engagements were addressed simultaneously with nerve and tendon fluid-structural interaction (FSI) with the synovial fluid within the carpal tunnel. The effects of pertinent physical parameters on median nerve stress were explored. The results suggest that median nerve stresses due to direct structural contact are typically far higher than those from fluid pressure.

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Finite Element Modeling of Direct Head Impact

Cited by 106 publications

References 5 publications

Investigation of brain contusion mechanism and threshold by combining finite element analysis with in vivo histology data

Investigation of brain contusion mechanism and threshold by combining finite element analysis with in vivo histology data

Numerical human head model for traumatic injury assessment

A fluid-immersed multi-body contact finite element formulation for median nerve stress in the carpal tunnel

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