Assessment of the shock adsorption properties of bike helmets: a numerical/experimental approach

In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests were carried out on samples of expanded polystyrene (EPS) and polycarbonate (PC), respectively constituting the internal shock absorption layer...

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Published inComputer methods in biomechanics and biomedical engineering Vol. 23; no. 5; pp. 169 - 181
Main Authors Bocciarelli, Massimiliano, Carvelli, Valter, Mariani, Stefano, Tenni, Matteo
Format Journal Article
LanguageEnglish
Published England Taylor & Francis 03.04.2020
Taylor & Francis Ltd
Subjects
Absorption
Acceleration
Compression
Compression tests
Computer simulation
Constitutive models
Failure mechanisms
Finite element method
Helmets
impacts
Localization
Mathematical models
numerical modelling
Polycarbonate
Polystyrene
Polystyrene resins
Product design
Protective equipment
Tensile tests
traumatic brain injury (TBI)
helmets
numerical modelling
traumatic brain injury (TBI)
impacts
Online AccessGet full text
ISSN1025-5842
1476-8259
1476-8259
DOI10.1080/10255842.2019.1709451

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Abstract In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests were carried out on samples of expanded polystyrene (EPS) and polycarbonate (PC), respectively constituting the internal shock absorption layer and the external hard shell of composite helmets. The measured responses of the two materials were then exploited to calibrate the relevant elasto-plastic constitutive models, adopted in full-scale finite element analyses of a helmet subject to standardized impacts. The simulations allowed assessing the time evolution of the acceleration measured inside the headform (according e.g., to EN 1078) and the failure mechanisms of the helmet, if any, as induced by the localization of plastic deformations.
AbstractList In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests were carried out on samples of expanded polystyrene (EPS) and polycarbonate (PC), respectively constituting the internal shock absorption layer and the external hard shell of composite helmets. The measured responses of the two materials were then exploited to calibrate the relevant elasto-plastic constitutive models, adopted in full-scale finite element analyses of a helmet subject to standardized impacts. The simulations allowed assessing the time evolution of the acceleration measured inside the headform (according e.g., to EN 1078) and the failure mechanisms of the helmet, if any, as induced by the localization of plastic deformations.
In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests were carried out on samples of expanded polystyrene (EPS) and polycarbonate (PC), respectively constituting the internal shock absorption layer and the external hard shell of composite helmets. The measured responses of the two materials were then exploited to calibrate the relevant elasto-plastic constitutive models, adopted in full-scale finite element analyses of a helmet subject to standardized impacts. The simulations allowed assessing the time evolution of the acceleration measured inside the headform (according e.g., to EN 1078) and the failure mechanisms of the helmet, if any, as induced by the localization of plastic deformations.In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests were carried out on samples of expanded polystyrene (EPS) and polycarbonate (PC), respectively constituting the internal shock absorption layer and the external hard shell of composite helmets. The measured responses of the two materials were then exploited to calibrate the relevant elasto-plastic constitutive models, adopted in full-scale finite element analyses of a helmet subject to standardized impacts. The simulations allowed assessing the time evolution of the acceleration measured inside the headform (according e.g., to EN 1078) and the failure mechanisms of the helmet, if any, as induced by the localization of plastic deformations.
Author Bocciarelli, Massimiliano
Mariani, Stefano
Tenni, Matteo
Carvelli, Valter
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Snippet In this paper, a numerical and experimental study of the shock absorption properties of bike helmets is presented. Laboratory compression and tensile tests...
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SubjectTerms Absorption
Acceleration
Compression
Compression tests
Computer simulation
Constitutive models
Failure mechanisms
Finite element method
Helmets
impacts
Localization
Mathematical models
numerical modelling
Polycarbonate
Polystyrene
Polystyrene resins
Product design
Protective equipment
Tensile tests
traumatic brain injury (TBI)
Title Assessment of the shock adsorption properties of bike helmets: a numerical/experimental approach
URI https://www.tandfonline.com/doi/abs/10.1080/10255842.2019.1709451
https://www.ncbi.nlm.nih.gov/pubmed/31905291
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