Design of a Helmet Liner for Improved Low Velocity Impact Protection

Fitek, John; Meyer, Erin

doi:10.21236/ada578032

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…The differences observed on frontal and rear impacts with the experimental test can be due to the different possible adjustments of the pads and the support system or also due to the location of impact, which can vary significantly depending on the exact location when striking against the anvil. However, these values are similar to those obtained in simulations with the ACH helmet in front, rear, and side impact, carried out by Fitek and Meyer [23], as shown in Figure 11.…”

Section: Effectiveness Of Current Standards To Prevent Head Injuriessupporting

confidence: 88%

“…However, standards with low impact conditions such as the ECE R22/05 standard [19] and the NHTSA [43] have not been sufficiently studied and reveal specific considerations. The results obtained with simulations for the surrogate configuration carried out in this paper show a good correlation with data provided by a helmet manufacturer and the results from [23]. The differences observed on frontal and rear impacts with the experimental test can be due to the different possible adjustments of the pads and the support system or also due to the location of impact, which can vary significantly depending on the exact location when striking against the anvil.…”

Section: Effectiveness Of Current Standards To Prevent Head Injuriessupporting

confidence: 77%

“…It follows that the results obtained from the configurations are compared in terms of PLA with data provided by the combat helmet manufacturer and ACH military combat helmet used by Fitek and Meyer [23]. All the tests were carried out according to the ECE R22.05 standard and an impact velocity of 4.4 m/s.…”

Section: Peak Linear Acceleration (Pla)mentioning

confidence: 99%

“…In 2012, Fitek and Moyes [23] realized an investigation for the Natick Soldier Research, Development and Engineering Centre in which they tested different foam materials and configurations for the design of combat helmets. They developed a finite element model in LS-Dyna, validated previously with experimental test, which combined different foam configurations, and subjected the helmet to different velocity and impact locations.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Combat Helmet Behavior under Blunt Impact

et al. 2020

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New threats are a challenge for the design and manufacture of modern combat helmets. These helmets must satisfy a wide range of impact velocities from ballistic impacts to blunt impacts. In this paper, we analyze European Regulation ECE R22.05 using a standard surrogate head and a human head model to evaluate combat helmet performance. Two critical parameters on traumatic brain analysis are studied for different impact locations, i.e., peak linear acceleration value and head injury criterion (HIC). The results obtained are compared with different injury criteria to determine the severity level of damage induced. Furthermore, based on different impact scenarios, analyses of the influence of impact velocity and the geometry impact surface are performed. The results show that the risks associated with a blunt impact can lead to a mild traumatic brain injury at high impact velocities and some impact locations, despite satisfying the different criteria established by the ECE R22.05 standard. The results reveal that the use of a human head for the estimation of brain injuries differs slightly from the results obtained using a surrogate head. Therefore, the current combat helmet configuration must be improved for blunt impacts. Further standards should take this into account and, consequently, combat helmet manufacturers on their design process.

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Section: Effectiveness Of Current Standards To Prevent Head Injuriessupporting

confidence: 88%

Section: Effectiveness Of Current Standards To Prevent Head Injuriessupporting

confidence: 77%

Section: Peak Linear Acceleration (Pla)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of Combat Helmet Behavior under Blunt Impact

et al. 2020

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“…They used the collected acceleration data to calculate the different brain strains using the SIMon Finite Element brain model. Fitek et Meyer [14] tested different polymeric foams and configurations for the ACH padding system developing prototypes with the aim of investigating possible improvements for offering low-velocity impact protection in ambient and hot conditions. Kayhart et al [15] organized a study on the feasibility of adopting an external blunt impact attenuator.…”

Section: Introductionmentioning

confidence: 99%

Modeling of composite combat helmet subjected to blunt impacts

Shehu,

Ferrari,

Jiménez

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Combat helmets are a complex system that is crucial for users in different adverse scenarios. Historically, the primary focus in the development of these items has been on compliance with high-velocity impact requirements, such as bullets or blast loads. In recent years, the investigation of blunt impact scenarios has gained momentum. Consequently, standards have been updated; however, they still lack a consolidated methodology for assessing helmet safety. A virtual testing approach is designed to replicate experimental tests. The main advantage of this model is its ability to assess loading conditions of interest and evaluate existing engineering solutions against new standards requirements.

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