On analysis of deformation and damage mechanisms of DYNEEMA composite under ballistic impact

Gilson, L.; Imad, A.; Rabet, L.; Coghe, F.

doi:10.1016/j.compstruct.2020.112791

Cited by 26 publications

(11 citation statements)

References 16 publications

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“…(i) edge-pull, (ii) crease formation, (iii) folding, and (iv) dishing; are present for the 360 mm 1L-SBSL. Similar deformation patterns have been reported in Gilson et al and Hazzard et al 7,10 in modeling transverse impact on hard ballistic soft laminates using solid elements.…”

Section: Variable Velocity Transverse Impact On a Finite Size Single ...supporting

confidence: 86%

“…A body armor system is essential for the protection of soldiers from high velocity projectile impacts, 1–6 which comprises three major components (i) a hard armor plate (HAP) as the strike face, (ii) a hard ballistic soft composite laminate (HBSCL) as a backing to the HAP, 3,7–12 and (iii) a soft armor pack (SAP) or insert (SAI) within a nylon bag; integrated in a polyester garment. 1 Focus of the present paper is the soft armor pack (SAP) or soft ballistic armor pack (SBAP).…”

Section: Introductionmentioning

confidence: 99%

“…There are several review articles, 1,4–6 on the soft body armor which provide the overall aspects of soft body armor technology and the progress made so far. There is a good body of literature on HBSCL, 7,9–11,22–24 woven fabric based SAP with and without shear thickening fluid. 14–16,25,26 However, ballistic performance of soft body armor pack (SBAP/SAP) is not available in the open literature because of the sensitive nature of the data.…”

Section: Introductionmentioning

confidence: 99%

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Perforation mechanics of UHMWPE soft ballistic sub-laminate and soft ballistic armor pack: A finite element study

Haque

Gillespie

2021

Journal of Thermoplastic Composite Materials

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Soft-ballistic sub-laminate (SBSL) made from ultra-high molecular weight polyethylene (UHMWPE) fibers in [0/90] stacking sequence are the building block of a multi-layer soft-ballistic armor pack (SBAP, aka Soft Armor). A systematic study of the perforation dynamics of a single layer SBSL and several multi-layer SBAPs (2, 3, 4, 8, 16, 24, 32 layers) is presented for the first time in the literature. A previously validated finite element model of transverse impact on a single layer is used to study the perforation mechanics of multi-layer SBAPs with friction between individual layers. Following the classical definition of ballistic limit velocity, a minimum perforation velocity has been determined for free-standing single layer SBSL and multi-layer SBAPs. For the multi-layer SBAPs, complete perforations have been identified as progressive perforation of individual layers through the thickness. The minimum perforation velocities of multi-layer SBAPS is linear with the areal density for the eight (8) layer target and thicker. Large deformation behavior and perforation mechanics of the SBAPs is discussed in detail.

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Section: Variable Velocity Transverse Impact On a Finite Size Single ...supporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Perforation mechanics of UHMWPE soft ballistic sub-laminate and soft ballistic armor pack: A finite element study

Haque

Gillespie

2021

Journal of Thermoplastic Composite Materials

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“…The fibers used in ballistics are characterized by a low density, a high tensile strength, and the ability to absorb high levels energy [ 9 ]. High-strength poly(phenylene-terephthalate-amide) fibers (Kevlar ® , Twaron ® ), polyethylene fibers (HPPE) (Dyneema ® , Spectra ® ), glass fibers (S-2 Glass), and products based on poly(p-phenylene-benzobisoxasole) (PBO) fibers (Zylon ® ) are commonly used [ 4 , 10 , 11 , 12 ]. Para-aramid fibers were first made in the 1960s by scientists from the DuPont company.…”

Section: Introductionmentioning

confidence: 99%

Fragment-Resistant Property Optimization within Ballistic Inserts Obtained on the Basis of Para-Aramid Materials

et al. 2022

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A high protection level without an excessive weight is a basic assumption in the design of modern armors and protection systems. Optimizing armors is a task of development of the utmost importance, and is the subject of the work contained within this article. Optimization of ballistic inserts was carried out using multicriterial analysis (MCA), which enables the selection of the optimal composition, taking into account properties such as ballistic resistance, physicomechanical, and/or functional properties. For this purpose, various types of composite systems were produced and tested in terms of their fragment-resistant properties according to STANAG 2920 and the composite areal density of different ballistic inserts: Soft inserts made of Twaron® para-aramid sheets, hard ballistic inserts made of multilayer hot-pressed preimpregnated sheets, and hybrid hard ballistic inserts prepared on the basis of multilayer hot-pressed preimpregnated sheets and ceramics. The application of MCA and performance of experimental fragment resistance tests for a wide spectrum of para-aramid inserts are part of the novelty of this work. The obtained test results showed that depending on the composition of the composite system, we could obtain a wide range of fragmentation resistance in the range of 300 to >1800 m/s, which depended on the areal density and type of composite system used. The results also confirmed that MCA is a good computational tool to select the optimal design of para-aramid ballistic inserts.

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“…Furthermore, the internal damage of the panel can be difficult to inspect, [34][35][36] except directly by means of X-ray tomography, or after transversally cutting the impacted target using optical inspection or scanning electron microscopy (SEM). 2 A considerable and growing body of literature has focused on the increase of sandwich panels' efficiency against perforation loadings, and researchers continue to develop new panels with higher performances. For example, Vaidya et al 37 studied the perforation resistance of aluminium foam sandwich (AFS) panels with S2-glass, E-glass, aramid and carbon fibre-reinforced vinyl ester resin at 5 m/s and 100 m/ s. The authors found that samples with S2-glass face sheet material showed the most significant impact resistance with reduced damages.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the perforation behaviour of sandwich panels with hybrid composite face sheets and cellular aluminium core using quasi-static and instrumented inverse impact methods

Derbala

Tria

Gilson

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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With the rising demand for lightweight and high-performance shielding systems, sandwich panels made of thin rigid face sheets and cellular material cores have recently received much attention. The present study aims to investigate the perforation behaviour of lightweight sandwich panels made of fibre reinforced composite face sheets and aluminium foam core under quasi-static and dynamic testing conditions. A particular focus is made on the fibre hybridization effect on the overall panel behaviour. Impact perforation tests were conducted using an inverse perforation technique. Instead of conventional free-flying projectile impact tests, studied samples are fixed in a hollow projectile. Then, this assembly is accelerated toward an instrumented steel perforator replacing the incident bar of a split Hopkinson pressure bar. Consequently, this modified split Hopkinson pressure bar system can be used as both a perforator and a measuring device. Therefore, the piercing force-displacement curves, the energy absorption capability as well as the penetration and damage mechanisms of the tested panels was analysed and compared to quasi-static perforating tests. To better assess the testing results, quasi-static tensile and bending tests were carried out on the face sheets materials. Moreover, quasi-static and dynamic compression tests were performed on the aluminium foam core using conventional test methods and direct split Hopkinson pressure bar. Unlike the aluminium alloy face sheets, the experimental findings revealed that the sandwich panels with composite face sheets demonstrated higher rate sensitivity, better perforation resistance and specific energy absorption capability. Results have also shown that the hybridization of carbon and glass fabrics combined their best tension and bending properties as well as their higher dynamic strength, which has increased the sandwich panel's perforation resistance.

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On analysis of deformation and damage mechanisms of DYNEEMA composite under ballistic impact

Cited by 26 publications

References 16 publications

Perforation mechanics of UHMWPE soft ballistic sub-laminate and soft ballistic armor pack: A finite element study

Perforation mechanics of UHMWPE soft ballistic sub-laminate and soft ballistic armor pack: A finite element study

Fragment-Resistant Property Optimization within Ballistic Inserts Obtained on the Basis of Para-Aramid Materials

Experimental investigation on the perforation behaviour of sandwich panels with hybrid composite face sheets and cellular aluminium core using quasi-static and instrumented inverse impact methods

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