Protective performance and dynamic behavior of composite body armor with shear stiffening gel as buffer material under ballistic impact

Tang, Fan; Dong, Cheng; Yang, Zhe; Kang, Yuetong; Huang, Xiaoguang; Li, Maohui; Chen, Yuchao; Cao, Wenjian; Huang, Chenguang; Guo, Yacong; Wei, Yanpeng

doi:10.1016/j.compscitech.2021.109190

Cited by 68 publications

(44 citation statements)

References 31 publications

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“…Upon closure, a further immobilisation will take place in which the mechanical properties of the material may be partially or fully restored. In the PBDMS-based proposed materials in this work, the presence of weak B-O crosslink bonds can facilitate this, as these dynamic bonds are constantly in a breaking and reformation reversible process, due to the weak bond energy, thus exhibiting self-healing properties 60 – 62 . A 6-h timelapse microscopy examination on the nNAMeG with where an incision was introduced in the middle of the material was performed, to demonstrate its self-healing properties.…”

Section: Resultsmentioning

confidence: 99%

A multifunctional ultra-thin acoustic membrane with self-healing properties for adaptive low-frequency noise control

Boccaccio

Myronidis

Thielke

et al. 2022

Sci Rep

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This paper proposes a novel multifunctional ultra-thin membrane based on a Polyborosiloxane-based gel with stimuli-responsive sound absorption and sound transmission loss (STL) and characterised by excellent self-healing properties. This adaptive behaviour is the result of a dynamically activated phase transition in the membrane’s polymeric network which is given by the interaction with the travelling sound pressure wave. The presence and the extent of such phase transition in the material was investigated via oscillatory rheological measurements showing the possibility to control the dynamic response by modifying the Boron content within the polymer. Acoustic analyses conducted at different stimuli responses showed high and dynamic absorption (95%) at the absorption coefficient peaks and an adaptive shift to lower frequencies while sound amplitudes were increased. An average STL up to 27 dB in the frequency range between 500 to 1000 Hz was observed and an increased STL above 2 dB was measured as the excitation amplitude was increased. Results demonstrated that the new membrane can be used to develop deep subwavelength absorbers with unique properties (1/54 wavelength in absorption and 1/618 in STL) able to tune their performance in response to an external stimulus while autonomously regaining their properties in case of damage thanks to their self-healing ability.

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Section: Resultsmentioning

confidence: 99%

A multifunctional ultra-thin acoustic membrane with self-healing properties for adaptive low-frequency noise control

Boccaccio

Myronidis

Thielke

et al. 2022

Sci Rep

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“…These results confirm that the SCS@PU developed offers multifunctional performances. To the best of our knowledge, as shown in Table S2, 12,13,16,17,42,44,45,48 a soft body armor with simultaneous strain-sensing ability and superhydrophobicity has never been reported.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In recent years, though various soft body armors with enhanced anti-impact capacity have been developed, most of them are incapable of real-time detection of impact forces to evaluate the injuries. − On the other hand, PU foams modified with conductive nanofillers could be used as wearable strain sensors due to their high strain sensitivity, low density, and outstanding compressibility. , A conductive carbon black/PU foam composite fabricated via a unidirectional freeze-drying process was capable of distinguishing compressive strains up to 80% and accordingly was effective in monitoring various human motions . Intuitively, the combination of an STG and conductive nanofillers in PU foam should be able to realize both anti-impact and sensing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Polyurethane Composite Foam with Outstanding Anti-impact Capacity for Soft Body Armors

Fan

Xue

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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Herein, a multifunctional polyurethane (PU) composite foam with a hierarchical structure is fabricated by dip-coating a carbon nanotube/shear-thickening gel (CNT/STG) and spray-coating nano-SiO 2 /STG on PU foam. The prepared nano-SiO 2 / CNT/STG@PU (SCS@PU) composite foam is lightweight, highly compressive, electrically conductive, superhydrophobic, and impact-energy absorptive. As a result, it possesses an excellent sensing ability to compression with a stable response up to 80% strain, an outstanding linearity of R 2 > 0.99, and a wide response frequency of 0.01 to 1 Hz; it can also be used for effectively detecting impact force and sensing various human motions. Moreover, the superhydrophobicity with a water contact angle up to 154°of SCS@PU composite foam endows it with an excellent resistance to hazardous liquids (strong acid and alkali) to ensure its service reliability under harsh circumstances. In particular, the SCS@PU exhibits an outstanding anti-impact capability with an impact force attenuation rate of SCS@PU as high as 81%. Finally, its applications as soft body armors are demonstrated in protecting a wearer wearing a helmet with the SCS@PU as liner and using the SCS@PU as a smart kneecap against impact. On consideration of its excellent strain-sensing ability, superhydrophobicity, and outstanding anti-impact capability, the multifunctional SCS@PU composite foam developed is promising for personal safety protection.

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“…From the perspective of the panels, Mishra et al [ 81 ], Tang et al [ 18 ], Zhang et al [ 148 ], Olszewska et al [ 168 ], Bajya et al [ 182 ], and Hasan-Nezhad et al [ 178 ] analyzed the ballistic performance of a lightweight armor vest under other condition, namely using UHMWPE or E-Glass fabrics. Further analysis can also be observed in Nayak et al [ 191 ], such as thermogravimetric analysis, rheological tests, and high-strain tests, which are beyond the scope of the present work.…”

Section: State-of-the-artmentioning

confidence: 99%

“…The main objective of this piece of armor is to provide ballistic protection to the user without restraining its mobility. To achieve its goal, high-performance synthetic fibers fabrics are used, such as carbon fibers, aramid, fiberglass, and nylon [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Fabric Impregnation with Shear Thickening Fluid for Ballistic Armor Polymer Composites: An Updated Overview

et al. 2022

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As destructive power of firearms raises over the years, ballistic armors are in continuous need of enhancement. For soft armors, this improvement is invariably related to the increase of stacked layers of high-strength fiber fabrics, which potentially restrains wearer mobility. A different solution was created in the early 2000s, when a research work proposed a new treatment of the ballistic panels with non-Newtonian colloidal shear thickening fluid (STF), in view of weight decreasing with strength reinforcement and cost-effective production. Since then, databases reveal a surge in publications generally pointing to acceptable features under ballistic impact by exploring different conditions of the materials adopted. As a result, several works have not been covered in recent reviews for a wider discussion of their methodologies and results, which could be a barrier to a deeper understanding of the behavior of STF-impregnated fabrics. Therefore, the present work aims to overview the unexplored state-of-art on the effectiveness of STF addition to high-strength fabrics for ballistic applications to compile achievements regarding the ballistic strength of this novel material through different parameters. From the screened papers, SiO2, Polyethylene glycol (PEG) 200 and 400, and Aramid are extensively being incorporated into the STF/Fabric composites. Besides, parameters such as initial and residual velocity, energy absorbed, ballistic limit, and back face signature are common metrics for a comprehensive analysis of the ballistic performance of the material. The overview also points to a promising application of natural fiber fabrics and auxetic fabrics with STF fluids, as well as the demand for the adoption of new materials and more homogeneous ballistic test parameters. Finally, the work emphasizes that the ballistic application for STF-impregnated fabric based on NIJ standards is feasible for several conditions.

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Protective performance and dynamic behavior of composite body armor with shear stiffening gel as buffer material under ballistic impact

Cited by 68 publications

References 31 publications

A multifunctional ultra-thin acoustic membrane with self-healing properties for adaptive low-frequency noise control

A multifunctional ultra-thin acoustic membrane with self-healing properties for adaptive low-frequency noise control

Multifunctional Polyurethane Composite Foam with Outstanding Anti-impact Capacity for Soft Body Armors

Fabric Impregnation with Shear Thickening Fluid for Ballistic Armor Polymer Composites: An Updated Overview

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