Ballistic performance of aramid composite combat helmet for protection against small projectiles

Rubio, Ignacio; Rodríguez-Millán, M.; Marco, Miguel; Olmedo, A.; Loya, J.A.

doi:10.1016/j.compstruct.2019.111153

Cited by 38 publications

(15 citation statements)

References 83 publications

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“…The helmet shell is the most external part and constitutes the principal structural element of the EOD helmet. It is made of composite based on aramid fiber, which is widely used in the field of personal protection [21,22,[28][29][30][31][32] due to the excellent resistance to weight ratio. Helmet shell thickness is 4 mm.…”

Section: Helmet Assembly Modelmentioning

confidence: 99%

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Numerical Analysis of EOD Helmet under Blast Load Events Using Human Head Model

et al. 2020

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Brain injury resulting from improved explosives devices (IEDs) is identified as a challenge for force securities to improve protection equipment. This paper focuses on the mechanical response of explosive ordnance disposal (EOD) helmet under different blast loadings. Limited published studies on this type of helmet are available in the scientific literature. The results obtained show the blast performance of the EOD helmet because a decrease in the maximum values in the measured damage parameters is found. Therefore, an EOD helmet minimizes the risks of the severity of injuries on the user showing a low probability of injury.

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Section: Helmet Assembly Modelmentioning

confidence: 99%

“…Helmet shell thickness is 4 mm. *MAT_COMPOSITE_DAMAGE (MAT_022) has been used to define the mechanical behavior model of aramid composite, where it is defined as orthotropic material (9 elastic constants) and assumes a linear elastic behavior until failure [31].…”

Section: Helmet Assembly Modelmentioning

confidence: 99%

Numerical Analysis of EOD Helmet under Blast Load Events Using Human Head Model

et al. 2020

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“…Palta et al [23] performed a visual inspection of the damage in the combat helmet in case of a rifle impact and numerical analysis of the different failure modes: fibre breakage, matrix cracking, compressive matrix damage, and delamination. Recently, I. Rubio et al [24] developed a damage analysis of combat helmets submitted to several projectile perforating impacts by computed tomography.…”

Section: Introductionmentioning

confidence: 99%

Postmortem Analysis Using Different Sensors and Technologies on Aramid Composites Samples after Ballistic Impact

Rubio

Díaz-Álvarez

Bernier

et al. 2020

Sensors

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This work focuses on the combination of two complementary non-destructive techniques to analyse the final deformation and internal damage induced in aramid composite plates subjected to ballistic impact. The first analysis device, a 3D scanner, allows digitalising the surface of the tested specimen. Comparing with the initial geometry, the permanent residual deformation (PBFD) can be obtained according to the impact characteristics. This is a significant parameter in armours and shielding design. The second inspection technique is based on computed tomography (CT). It allows analysing the internal state of the impacted sample, being able to detect possible delamination and fibre failure through the specimen thickness. The proposed methodology has been validated with two projectile geometries at different impact velocities, being the reaction force history on the specimen determined with piezoelectric sensors. Different loading states and induced damages were observed according to the projectile type and impact velocity. In order to validate the use of the 3D scanner, a correlation between impact velocity and damage induced in terms of permanent back face deformation has been realised for both projectiles studied. In addition, a comparison of the results obtained through this measurement method and those obtained in similar works, has been performed in the same range of impact energy. The results showed that CT is needed to analyse the internal damage of the aramid sample; however, this is a highly expensive and time-consuming method. The use of 3D scanner and piezoelectric sensors is perfectly complementary with CT and could be relevant to develop numerical models or design armours.

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“…However, it is not a trivial task to improve the protective performance of a combat helmet without losing the real purpose of using composite materials, which is a decrease in weight. Traditionally, combat helmets have to be subjected to ballistic standards such as STANAG 2920 [5] or NIJ 0106.01 [6] and, consequently, they are analyzed at high impact velocities for the different ammunition [7][8][9][10][11][12], also under blast loadings [13][14][15][16][17][18]. However, the military industry has not focused on analyzing the Appl.…”

Section: Introductionmentioning

confidence: 99%

“…Figure11. PLA of both head models and experimental data for each impact location using the head surrogate, the human head model, experimental data, and an advanced combat helmet (ACH).…”

mentioning

confidence: 99%

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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Ballistic performance of aramid composite combat helmet for protection against small projectiles

Abstract: El modelo presentado resulta una herramienta de gran potencial para el diseño y fabricación de cascos de combate debido a la versatilidad de aplicación que posee, permitiendo ajustar el número de capas exacto atendiendo al nivel de protección a alcanzar.

Cited by 38 publications

References 83 publications

Numerical Analysis of EOD Helmet under Blast Load Events Using Human Head Model

Numerical Analysis of EOD Helmet under Blast Load Events Using Human Head Model

Postmortem Analysis Using Different Sensors and Technologies on Aramid Composites Samples after Ballistic Impact

Evaluation of Combat Helmet Behavior under Blunt Impact

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