scholarly journals A high-fidelity human cervical muscle finite element model for motion and injury studies

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Fan Li ◽  
Honggeng Li ◽  
Kang Lei ◽  
Biao Zhang ◽  
Sicheng Su ◽  
...  
Keyword(s):  
Finite Element ◽  
Head And Neck ◽  
Human Head ◽  
Element Model ◽  
Dynamic Responses ◽  
Material Parameters ◽  
Cervical Muscle ◽  
Car Crash ◽  
Key Factor ◽  
Head And Neck Injury

Abstract Active muscle response is a key factor in the motion and injury of the human head and neck. Due to the limitations of experimentation and the shortcomings of previous finite element models, the influence of material parameters of cervical muscle on motions of the head and neck during a car crash have not been comprehensively investigated. In the present work, a model of the cervical muscle in a 50th-percentile adult male was constructed. The muscles were modelled using solid finite elements, with a nonlinear-elastic and viscoelastic material and a Hill material modelling the passive and active parts of each muscle, respectively. The head dynamic responses of the model were validated using results obtained from volunteer sled tests. The influence of the material parameters of a muscle on head and neck motions were determined. Our key finding was that the greater the stiffness and the contraction strength of the neck muscles, the smaller the rotation angle of the head and the neck, and, hence, the lower the risk of head and neck injury to occupants in a car crash.

A New Computer Simulation of Neck Injury Biomechanics

2011 ◽  
Vol 467-469 ◽  
pp. 339-344
Author(s):  
Na Li ◽  
Jian Xin Liu
Keyword(s):  
Finite Element ◽  
Cervical Spine ◽  
Head And Neck ◽  
Traffic Accidents ◽  
Ethical Issues ◽  
Human Head ◽  
Element Model ◽  
Neck Injury ◽  
Element Analysis ◽  
Injury Mechanisms

Head and neck injuries are the most frequent severe injury resulting from traffic accidents. Neck injury mechanisms are difficult to study experimentally due to the variety of impact conditions involved, as well as ethical issues, such as the use of human cadavers and animals. Finite element analysis is a comprehensive computer aided mathematical method through which human head and neck impact tolerance can be investigated. Detailed cervical spine models are necessary to better understand cervical spine response to loading, improve our understanding of injury mechanisms, and specifically for predicting occupant response and injury in auto crash scenarios. The focus of this study was to develop a C1–C2 finite element model with optimized mechanical parameter. The most advanced material data available were then incorporated using appropriate nonlinear constitutive models to provide accurate predictions of response at physiological levels of loading. This optimization method was the first utilized in biomechanics understanding, the C1–C2 model forms the basis for the development of a full cervical spine model. Future studies will focus on tissue-level injury prediction and dynamic response.

THE INFLUENCE OF BRAIN TISSUE MATERIAL PARAMETERS ON THE RESPONSE OF DYNAMIC CHARACTERISTICS BASED ON FINITE ELEMENT MODEL

2019 ◽  
Vol 19 (08) ◽  
pp. 1940058
Author(s):  
BIN YANG ◽  
HAO SUN ◽  
AIYUAN WANG ◽  
QUN WANG
Keyword(s):  
Finite Element ◽  
Head And Neck ◽  
Brain Tissue ◽  
Dynamic Characteristics ◽  
Human Head ◽  
Initial Parameter ◽  
Fe Model ◽  
Nasal Cartilage ◽  
Material Parameters ◽  
Tissue Material

Aiming at the uncertainty of material parameters of human brain tissue, the influence of tissue material performance sensitivity on frequency and mode shape under free vibration is studied. In this paper, the 50th percentile finite element (FE) model of human head and neck with detailed anatomical characteristics has been chosen as the research object, the parameters of skull, cerebrospinal fluid (CSF) and brain tissue materials with high sensitivity are analyzed by orthogonal test design and variance analysis. The results show that the natural frequencies of Group 7, Group 8 and Group 9 are all around 230[Formula: see text]Hz, which are basically consistent with the initial parameter of 229.18[Formula: see text]Hz, and the intracranial displacements of the three groups are also concentrated on the lateral nasal cartilage. The main reason is that the Young’s modulus of the skull used in three groups of experiments is 9780[Formula: see text]Mpa, which is close to the initial parameter of 8000[Formula: see text]Mpa. It indicates that the material parameter of the skull has the greatest influence on the dynamic characteristics of human head and neck, followed by the CSF and brain tissue. This study provides an effective method for vehicle safety and head and neck injury protection, and supplies a reference for FE analysis of head collision damage.

Development of a Finite Element Model for Porcine Scalp

2011 ◽  
Author(s):  
Stephanie Ryland ◽  
Sourav Patnaik ◽  
Rajkumar Prabhu ◽  
M. F. Horstemeyer ◽  
Jun Liao ◽  
...  
Keyword(s):  
Finite Element ◽  
Head Injuries ◽  
Human Head ◽  
Element Model ◽  
The United States ◽  
Human Experimentation ◽  
Fe Model ◽  
Fea Model ◽  
Car Crash ◽  
Control And Prevention

According to the Center for Disease Control and Prevention, head injuries account for 44% of all injury related deaths in the United States. Predictive head injury indicators are being used in car crash evaluations, forensic science investigations, and in research as an alternative to expensive, unpractical, and sometimes unethical animal or human experimentation [1]. The purpose of the present work is to characterize the structural and mechanical properties of the multilayer scalp and create a preliminary FEA model based on our findings. A longer term goal is to develop a high fidelity Finite Element (FE) model of human head.

Separating the Contributions in Localization Methods: A Technique to Enhance Identification of Damping Related Parameters

1999 ◽  
Author(s):  
Hervé Algrain ◽  
Calogero Conti ◽  
Pierre Dehombreux
Keyword(s):  
Finite Element ◽  
Model Updating ◽  
Element Model ◽  
Dynamic Responses ◽  
Finite Element Model Updating ◽  
Global Localization ◽  
Localization Method ◽  
The Family ◽  
Family Based ◽  
The Stability

Abstract Finite Element Model Updating has for objective to increase the correlation between the experimental dynamic responses of a structure and the predictions from a model. Among different initial choices, these procedures need to establish a set of representative parameters to be updated in which some are in real error and some are not. It is therefore important to select the correct properties that have to be updated to ensure that no marginal corrections are introduced. In this paper the standard localization criteria are presented and a technique to separate the global localization criteria in family-based criteria for damped structures is introduced. The methods are analyzed and applied to both numerical and experimental examples; a clear enhancement of the results is noticed using the family-based criteria. A simple way to qualify the stability of a localization method to noise is presented.

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