Finite Element Modelling of a Hybrid III Dummy and Material Identification for Validation

Yi, Seho; Mohan, Pradeep; Kan, C-D; Park, G-J

doi:10.1243/09544070jauto1568

Cited by 7 publications

(2 citation statements)

References 16 publications

(16 reference statements)

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“…The biofidelity of the ATDs has been extensively studied for use in vehicular crash tests. [45][46][47][48] Kendall et al 49 compared the response of the Hybrid-III head to the Hodgson-WSU head form typically used in NOCSAE testing and observed significant differences in peak linear and peak angular accelerations. In their study the nineaccelerometer array was used for both linear and angular measures.…”

Section: Impact Testing Methodsmentioning

confidence: 99%

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

et al. 2016

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A test method based upon a Hybrid-III head and neck assembly that includes measurement of both linear and angular acceleration is investigated for potential use in impact testing of protective headgear. The test apparatus is based upon a twin wire drop test system modified with the head/ neck assembly and associated flyarm components. This study represents a preliminary assessment of the test apparatus for use in the development of protective headgear designed to prevent injury due to falls. By including angular acceleration in the test protocol it becomes possible to assess and intentionally reduce this component of acceleration. Comparisons of standard and reduced durometer necks, various anvils, front, rear, and side drop orientations, and response data on performance of the apparatus are provided. Injury measures summarized for an unprotected drop include maximum linear and angular acceleration, head injury criteria (HIC), rotational injury criteria (RIC), and power rotational head injury criteria (PRHIC). Coefficient of variation for multiple drops ranged from 0.4 to 6.7% for linear acceleration. Angular acceleration recorded in a side drop orientation resulted in highest coefficient of variation of 16.3%. The drop test apparatus results in a reasonably repeatable test method that has potential to be used in studies of headgear designed to reduce head impact injury.

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Section: Impact Testing Methodsmentioning

confidence: 99%

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The biofidelity of the ATDs has been extensively studied for use in vehicular crash tests. 45–48 Kendall et al 49 compared the response of the Hybrid-III head to the Hodgson-WSU head form typically used in NOCSAE testing and observed significant differences in peak linear and peak angular accelerations. In their study the nine-accelerometer array was used for both linear and angular measures.…”

Section: Introductionmentioning

confidence: 99%

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

et al. 2014

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A test method based upon a Hybrid-III head and neck assembly that includes measurement of both linear and angular acceleration is investigated for potential use in impact testing of protective headgear. The test apparatus is based upon a twin wire drop test system modified with the head/neck assembly and associated flyarm components. This study represents a preliminary assessment of the test apparatus for use in the development of protective headgear designed to prevent injury due to falls. By including angular acceleration in the test protocol it becomes possible to assess and intentionally reduce this component of acceleration. Comparisons of standard and reduced durometer necks, various anvils, front, rear, and side drop orientations, and response data on performance of the apparatus are provided. Injury measures summarized for an unprotected drop include maximum linear and angular acceleration, head injury criteria (HIC), rotational injury criteria (RIC), and power rotational head injury criteria (PRHIC). Coefficient of variation for multiple drops ranged from 0.4 to 6.7% for linear acceleration. Angular acceleration recorded in a side drop orientation resulted in highest coefficient of variation of 16.3%. The drop test apparatus results in a reasonably repeatable test method that has potential to be used in studies of headgear designed to reduce head impact injury.

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A Constitutive Model to Characterize In Vivo Human Palmar Tissue

Shojaeizadeh

Spartacus

Sparrey

2022

Journal of Biomechanical Engineering

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In vivo characteristics of palmar soft tissue can be used to improve the accuracy of human models to explore and simulate a range of contact scenarios. Tissue characteristics can help to assess injury prevention strategies and designing technologies that depend on quantified physical contacts such as prosthetics, wearables, and assistive devices. In this study, a simplified quasi-linear viscoelastic (QLV) model was developed to quantify large deformation, in-vivo palmar tissue relaxation characteristics. We conducted relaxation tests on 11 young adults (6 males, 5 females, 18<age<30, mean age: 25±4yr) and 9 older adults (6 males, 3 females, age>50, mean age: 61.5±11.5yr) using a 3mm indenter to a depth of 50% of each participant's soft tissue thickness. The relaxation parameters of the QLV model were found to differ with age and sex, emphasizing the importance of using targeted material models to represent palmar soft tissue mechanics. Older adults showed on average 2.3-fold longer relaxation time constant compared to younger adults. It took 1.2-fold longer for young males to reach equilibrium than for young females; however, young females had a higher level of relaxation (36%) than young males (33%). Differences in specific QLV model parameters, P1, P2, and a were also found between age and sex groups. QLV characteristics differentiated by age and sex, add bio-fidelity to computational models which can provide a better representation of the diversity of tissue properties in the population.

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Finite Element Modelling of a Hybrid III Dummy and Material Identification for Validation

Cited by 7 publications

References 16 publications

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

Response of an Impact Test Apparatus for Fall Protective Headgear Testing Using a Hybrid-III Head/Neck Assembly

A Constitutive Model to Characterize In Vivo Human Palmar Tissue

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