Creating a Biofidelic Seating Surrogate

Adams, Dan; Morgan, Gordon B.; Nghi, Thanh; Salloum, Michael; O'Bannon, Terry

doi:10.4271/1999-01-0627

Cited by 12 publications

(6 citation statements)

References 15 publications

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“…The stiffness of the human soft tissues was increased and decreased by a factor 10 with respect to the reference model, i.e. similar with the variation in human soft tissue properties reported in literature [1,2,6,20,22,29]. The stiffness of the cushion was decreased a factor 10 4 from 2.0 GPa to 0.2 MPa for simulation of a soft cushion with respect to the rigid seat simulation.…”

Section: Simulation Set-upsupporting

confidence: 69%

“…Chow and Odell [9] and Lizee et al [20] reported consistent values. However, the studies of Bader and Bowker [2] and Adams et al [1] reported much lower values, while Todd and Thacker [35] described larger values. In their studies, Setyabudhy et al…”

Section: Materials Modelsmentioning

confidence: 93%

“…The values for A 1 , A 2 and n have been set to: A 1 ¼ 1:65 kPa; A 2 ¼ 3:35 kPa and n ¼ 0:49: These values fall in the range for human soft tissues properties reported in literature [1,2,6,9,20,23,30].…”

Section: Materials Modelsmentioning

confidence: 99%

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A Finite Element Model of the Human Buttocks for Prediction of Seat Pressure Distributions

Verver¹,

Hoof²,

Oomens³

et al. 2004

Computer Methods in Biomechanics and Biomedical Engineering

102

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Seating comfort is becoming increasingly important for the automotive industry. Car manufacturers use seating comfort to distinguish their products from those of competitors. However, the development and design of a new, more comfortable seat is time consuming and costly. The introduction of computer models of human and seat will accelerate this process. The contact interaction between human and seat is an important factor in the comfort sensation of subjects. This paper presents a finite element (FE) model of the human buttocks, able to predict the pressure distribution between human and seating surface by its detailed and realistic geometric description. A validation study based on volunteer experiments shows reasonable correlation in pressure distributions between the buttocks model and the volunteers. Both for simulations on a rigid and a soft cushion, the model predicts realistic seat pressure distributions. A parameter study shows that a pressure distribution at the interface between human and seat strongly depends on variations in human flesh and seat cushion properties.

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Section: Simulation Set-upsupporting

confidence: 69%

Section: Materials Modelsmentioning

confidence: 93%

See 1 more Smart Citation

A Finite Element Model of the Human Buttocks for Prediction of Seat Pressure Distributions

Verver¹,

Hoof²,

Oomens³

et al. 2004

Computer Methods in Biomechanics and Biomedical Engineering

102

View full text Add to dashboard Cite

show abstract

“…In the literature, it is well-established that the non-linear hyperelastic isotropic material model is the best compromise between physical reality and computational efficiency when dealing with the human-body soft tissue. However, the type(s) of the hyperelastic isotropic material model and their parameterizations varies widely [19,[21][22][23][24][25][26]. Many studies used a Mooney-Rivlin hyperelastic isotropic material model which was capable of accounting for large (non-linear) elastic deformations.…”

Section: B Materials Propertymentioning

confidence: 99%

The Finite Element Model of Seated Whole Human Body for Vibration Investigations of Lumbar Spine in Complex System

et al. 2020

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The dynamic of human body with three-dimensional (3D) anatomical structure is not considered in the vehicle system dynamics. Moreover, the dynamic of the lumbar spine is not studied in the finite element (FE) model of the seated human, and the influence of external conditions on it is not considered. The aim of the study is to propose a comprehensive dynamic model and an analysis method to study the dynamic of the lumbar spine in a complex system. It is investigated by extracting the first six modals of different lumbar spine FE models (eight models), and the dynamic responses of the lumbar spine under white noise excitation are analyzed by random response method. It is found that the mode deformation and the resonant frequencies of the lumbar spine in vivo and vitro model are significantly different, and the peak response value of the lumbar spine is at the resonant frequency. It is concluded that the influence of vibration on the lumbar spine could be more comprehensively and visually studied by analyzing the displacement response power spectrum of FE model of the seated human body. This study provides a new method and reference for the subsequent study of the vibration behavior of the lumbar spine in complex system (especially in vehicle system dynamics), and the finding is helpful for us to find more and better protection methods of human body. INDEX TERMS seated human body model, dynamic mechanical behavior, vibration, complex system, random response analysis.

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“…According to medical research, the thickness of skin was set to 1 mm, and the mechanical properties of material of skin were linear elastic, isotropic, and approximately incompressible. [30][31][32] Reasonable simplification for the materials of human body must be conducted because of different material properties in different tissues of human body. For example, the material property of viscera was assumed to be linear and isotropic.…”

Section: Materials Properties Of Human Bodymentioning

confidence: 99%

Human body modeling method to simulate the biodynamic characteristics of spine in vivo with different sitting postures

Dong

Guo

2017

Numer Methods Biomed Eng

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The aim of this study is to model the computational model of seated whole human body including skeleton, muscle, viscera, ligament, intervertebral disc, and skin to predict effect of the factors (sitting postures, muscle and skin, buttocks, viscera, arms, gravity, and boundary conditions) on the biodynamic characteristics of spine. Two finite element models of seated whole body and a large number of finite element models of different ligamentous motion segments were developed and validated. Static, modal, and transient dynamic analyses were performed. The predicted vertical resonant frequency of seated body model was in the range of vertical natural frequency of 4 to 7 Hz. Muscle, buttocks, viscera, and the boundary conditions of buttocks have influence on the vertical resonant frequency of spine. Muscle played a very important role in biodynamic response of spine. Compared with the vertical posture, the posture of lean forward or backward led to an increase in stress on anterior or lateral posterior of lumbar intervertebral discs. This indicated that keeping correct posture could reduce the injury of vibration on lumbar intervertebral disc under whole-body vibration. The driving posture not only reduced the load of spine but also increased the resonant frequency of spine.

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Creating a Biofidelic Seating Surrogate

Cited by 12 publications

References 15 publications

A Finite Element Model of the Human Buttocks for Prediction of Seat Pressure Distributions

A Finite Element Model of the Human Buttocks for Prediction of Seat Pressure Distributions

The Finite Element Model of Seated Whole Human Body for Vibration Investigations of Lumbar Spine in Complex System

Human body modeling method to simulate the biodynamic characteristics of spine in vivo with different sitting postures

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