Finite element analysis of the Advanced Combat Helmet under various ballistic impacts

Palta, Emre; Fang, Hsu Wei; Weggel, David C.

doi:10.1016/j.ijimpeng.2017.10.010

Cited by 63 publications

(29 citation statements)

References 17 publications

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“…The mechanism of BABT is related to the pressure wave and stress wave generated by the instantaneous deformation of BCS, and on the other hand, it is created by the energy transmitted to the human by BCS [39]. The pressure wave can cause impact injury to the human organs near the impact point.…”

Section: Resultsmentioning

confidence: 99%

Numerical simulation for behind armor blunt trauma of human torso under non-penetrating ballistic impact

Tang

Guo

Yuan

et al. 2019

Preprint

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A human torso finite element model with high bio-fidelity was developed to study the 2 behind armor blunt trauma (BABT) of pistol cartridge on human torso with bulletproof composite 3 structure (BCS) and the effect of buffer layer (expandable polyethylene, EPE) on BABT. The 4 bulletproof structure was made of multilayered composite of aluminum alloy (AlSi 10 Mg) and 5 thermoplastic polyurethanes (TPU), and the ANSYS/LS-DYNA software was used to simulate the 6 blunt ballistic impact process of pistol cartridge on human torso. Results indicated that the BCS 7 could resist the shooting speed of 515 m/s without being broken. During the process of pistol 8 cartridge shooting the BCS, the energy of pistol cartridge was transmitted to the human organs 9 through the BCS, thereby causing human injury. Moreover, the mechanical response parameters 10 of various organs were determined by the distance between the human organs and the impact point. 11The sternal fracture and liver rupture were not produced based on the threshold stress of sternum 12 and liver injury, no matter whether the buffer layer was added or not. According to the Axelsson 13 injury model, a slight to moderate injury was created when there was no buffer layer, but the injury 14 level was trace to slight caused by the buffer layer with thickness of 1.0 mm, and the buffer layer 15 with thickness of 2.5 mm and 5.0 mm caused subtle BABT. It was concluded that the buffer layer 16 could effectively reduce the BABT, and the reduction was related to the thickness of the buffer 17 layer. This study reveals the mechanism of the BABT, which can provide a theoretical basis for 18 the design of the bulletproof structure and the evaluation of structural bulletproof performance and 19 protection performance. 20

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Section: Resultsmentioning

confidence: 99%

Numerical simulation for behind armor blunt trauma of human torso under non-penetrating ballistic impact

Tang

Guo

Yuan

et al. 2019

Preprint

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“…e experimental test has been done for different samples as shown in Section 2. It was chosen to model two samples of different thicknesses for each layer to investigate the ballistic behavior of the whole system because the exact measurements of deformation and stress of the armor were difficult to obtain [6,13]. e geometry of the stack has been modeled into Ansys Design Modeler as solid materials with a different thickness of each layer.…”

Section: Ballistic Armormentioning

confidence: 99%

“…Different simulations have been performed to conduct the modeling conditions of Kevlar woven fabric. In the literature, it was found that Kevlar 29, Kevlar 149, and Kevlar 49 were the most relevant materials tested as Kevlar in terms of mechanical and ballistic properties [6,13,14]. In stack simulation, Kevlar 29 was modeled as orthotropic elasticity mechanical properties following the MAT_054/055 composite material standard [14] which also includes fiber and matrix failure conditions [6,14].…”

Section: Fiber-cementmentioning

confidence: 99%

Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

Soydan

Tunaboylu

Elsabagh

et al. 2018

Advances in Materials Science and Engineering

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is paper presents the experimental testing and simulation results of ballistic impact tests on laminated armor samples that consist of three layers of different materials: fiber-cement, Kevlar fabric, and steel. In experimental tests, a 9 mm FMJ bullet was launched towards a 100 cm 2 sample of the armor from the fiber-cement side. Ansys Workbench Explicit Dynamics and Ansys AUTODYN 3D were used to model and simulate the ballistic impact. Experimental testing and simulation results were compared to analyze the behavior of composite armor designs, and a good agreement was observed.

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“…Accurate modelling of the volumetric behaviour of materials like soft foams and lattices is of interest since it is relevant to the design of support structures (see review [11]), such as foam cushions and seats [12,13,14,15], helmets [16], and shoes and insoles ( [17,18,19]). Furthermore compliant lattices and foams are also employed in the design of soft robotics [20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Novel hyperelastic models for large volumetric deformations

Moerman

Fereidoonnezhad

McGarry

2020

International Journal of Solids and Structures

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Materials such as elastomeric foams, lattices, and cellular solids are capable of undergoing large elastic volume changes. Although many hyperelastic constitutive formulations have been proposed for deviatoric (shape changing) behaviour, few variations exist for large deformation volumetric behaviour. The first section of this paper presents a critical analysis of current volumetric hyperelastic models and highlights their limitations for large volumetric strains. In the second section of the paper we propose three novel volumetric strain energy density functions, which: 1) are valid for large volumetric deformations, 2) offer separate control of the volumetric strain stiffening behaviour during shrinkage (volume reduction) and expansion (volume increase), and 3) provide precise control of non-monotonic volumetric strain stiffening. To illustrate the ability of the novel formulations to capture complex volumetric material behaviour they are fitted and compared to a range of published experimental data.

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Finite element analysis of the Advanced Combat Helmet under various ballistic impacts

Cited by 63 publications

References 17 publications

Numerical simulation for behind armor blunt trauma of human torso under non-penetrating ballistic impact

Numerical simulation for behind armor blunt trauma of human torso under non-penetrating ballistic impact

Simulation and Experimental Tests of Ballistic Impact on Composite Laminate Armor

Novel hyperelastic models for large volumetric deformations

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