scholarly journals Modification and integration of shear thickening fluids into high performance fabrics

2021 ◽  
Author(s):  
Jakub Mikolaj Szczepanski
Keyword(s):  
High Performance ◽  
Chemical Properties ◽  
Shear Thickening ◽  
Innovative Technology ◽  
Chemical Compositions ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Great interest has aroused in developing the next generation body armour based on the incorporation of a Shear Thickening Fluid (STF) into high performance fabrics (Kevlar®, UHMWPE). This innovative technoloy allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. This innovative technology allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. The furrent research was undertaken to evaluate the stab resistance and the chemical properties of types of high performance fabrics, Kevlar and Ultra Hight Molecular Weight Polyethylene (UHMWPE), impregnated with several types of shear thickening fluids. The stab resistance properties of all samples were tested using drop tower and quasistatic testing apparatuses. Chemical compositions and microscopic structures were analyzed with Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The current study demonstrated the importance of incorporating Shear Thickening Fluid into woven high performance fibres. The results clearly display a significant enhancement in puncture resistance ony of Kevlar® fabrics impregnated with different combination of STFs.

scholarly journals Modification and integration of shear thickening fluids into high performance fabrics

2021 ◽  
Author(s):  
Jakub Mikolaj Szczepanski
Keyword(s):  
High Performance ◽  
Chemical Properties ◽  
Shear Thickening ◽  
Innovative Technology ◽  
Chemical Compositions ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Great interest has aroused in developing the next generation body armour based on the incorporation of a Shear Thickening Fluid (STF) into high performance fabrics (Kevlar®, UHMWPE). This innovative technoloy allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. This innovative technology allows for the production of comfortable, flexible, lightweight, stab and ballistic resistant protective garments. The furrent research was undertaken to evaluate the stab resistance and the chemical properties of types of high performance fabrics, Kevlar and Ultra Hight Molecular Weight Polyethylene (UHMWPE), impregnated with several types of shear thickening fluids. The stab resistance properties of all samples were tested using drop tower and quasistatic testing apparatuses. Chemical compositions and microscopic structures were analyzed with Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy Dispersive Spectroscopy. The current study demonstrated the importance of incorporating Shear Thickening Fluid into woven high performance fibres. The results clearly display a significant enhancement in puncture resistance ony of Kevlar® fabrics impregnated with different combination of STFs.

scholarly journals Dynamic/quasi-static stab-resistance and mechanical properties of soft body armour composites constructed from Kevlar fabrics and shear thickening fluids

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39803-39813 ◽  
Author(s):  
Jianbin Qin ◽  
Guangcheng Zhang ◽  
Lisheng Zhou ◽  
Jiantong Li ◽  
Xuetao Shi
Keyword(s):  
Mechanical Properties ◽  
Shear Thickening ◽  
Soft Body ◽  
Shear Thickening Fluid ◽  
Body Armour ◽  
Shear Thickening Fluids ◽  
Stab Resistance

Soft body armour composites were constructed by combining Kevlar fabrics with different quantities of shear thickening fluid (STF).

The cut resistant characteristics of organic high-performance yarns and STF/yarns

2018 ◽  
Vol 49 (10) ◽  
pp. 1317-1333 ◽  
Author(s):  
Lijuan Wang ◽  
Kejing Yu ◽  
Diantang Zhang ◽  
Kun Qian
Keyword(s):  
Synergistic Effect ◽  
Energy Conversion ◽  
High Performance ◽  
Shear Thickening ◽  
Theoretical Relation ◽  
Shear Thickening Fluid ◽  
Fracture Surfaces ◽  
Shear Thickening Fluids ◽  
External Forces

This paper mainly investigated the cut resistant property of shear thickening fluid enhanced organic high-performance yarn. Cut tests of neat yarn and shear thickening fluids/yarn were performed with two cutting angles. External forces involved in the cutting were analyzed. A simple theoretical relation was established based on the principle of the energy conversion. Two types of shear thickening fluids were prepared. Compared to neat yarn, the shear thickening fluids/yarn exhibited extremely high cut resistant property, especially, shear thickening fluids/yarn with graphene, indicating a synergistic effect. Fracture surfaces of fibers after yarns cut off were initially studied, which verified the cut resistant characteristics of organic high-performance yarns and shear thickening fluids/yarn.

Investigating the quasi-static puncture resistance of p-aramid nanocomposite impregnated with the shear thickening fluid

2014 ◽  
Vol 33 (22) ◽  
pp. 2064-2072 ◽  
Author(s):  
Hamid Reza Baharvandi ◽  
Peiman Khaksari ◽  
Morteza Alebouyeh ◽  
Masoud Alizadeh ◽  
Jalal Khojasteh ◽  
...  
Keyword(s):  
Particle Size ◽  
Shear Thickening ◽  
Mechanical Mixing ◽  
Shear Thickening Fluid ◽  
Puncture Resistance ◽  
Viscosity Increase ◽  
Fluid Concentration ◽  
Shear Thickening Fluids ◽  
The Difference ◽  
American Society

The effect of impregnating p-aramid fabrics with shear thickening fluids on their quasi-static puncture resistance performance has been investigated. To prepare the shear thickening fluid, 12 and 60-nm silica particles have been dispersed in polyethylene glycol by means of mechanical mixing. The results of rheological tests indicate that the reduction of particle size leads to the increase of suspension viscosity, increase of critical shear rate, and the diminishing of the frequency of transition to elastic state for the shear thickening fluids. Samples of p-aramid impregnated fabrics were subjected to the quasi-static puncture resistance test according to the American Society for Testing and Materials standard D6264. The quasi-static puncture resistance increased 4.5 times for samples with 35 wt% silica concentration relative to the neat sample. In particular, with the reduction of particle size, the samples undergo less deformation and can withstand larger loads at each shear thickening fluid concentration. However, at low and medium concentrations (15 and 25 wt%), the reduction in the particle size has a large effect on the load-bearing capacity of the fabrics. But in the case of 35 wt% concentration for both the 12- and 60-nm particles, the difference between maximum loads withstood by the fabric is negligible.

Incorporation of shear thickening fluid effects into computational modelling of woven fabrics subjected to impact loading: A review

2019 ◽  
Vol 11 (3) ◽  
pp. 340-378 ◽  
Author(s):  
Dakshitha Weerasinghe ◽  
Damith Mohotti ◽  
Jeremy Anderson
Keyword(s):  
Numerical Modelling ◽  
High Performance ◽  
Impact Resistance ◽  
Computational Modelling ◽  
Shear Thickening ◽  
Woven Fabrics ◽  
Shear Thickening Fluid ◽  
Shear Thickening Fluids ◽  
Layered Fabric ◽  
The Impact

Soft armour consisting of multi-layered high-performance fabrics are a popular choice for personal protection. Extensive work done in the last few decades suggests that shear thickening fluids improve the impact resistance of woven fabrics. Shear thickening fluid–impregnated fabrics have been proven as an ideal candidate for producing comfortable, high-performance soft body armour. However, the mechanism of defeating a projectile using a shear thickening fluid–impregnated multi-layered fabric is not fully understood and can be considered as a gap in the research done on the improvement of soft armour. Even though considerable progress has been achieved on dry fabrics, limited studies have been performed on shear thickening fluid–impregnated fabrics. The knowledge of simulation of multi-layered fabric armour is not well developed. The complexity in creating the geometry of the yarns, incorporating friction between yarns and initial pre-tension between yarns due to weaving patterns make the numerical modelling a complex process. In addition, the existing knowledge in this area is widely dispersed in the published literature and requires synthesis to enhance the development of shear thickening fluid–impregnated fabrics. Therefore, this article aims to provide a comprehensive review of the current methods of modelling shear thickening fluid–impregnated fabrics with a critical analysis of the techniques used. The review is preceded by an overview of shear thickening behaviour and related mechanisms, followed by a discussion of innovative approaches in numerical modelling of fabrics. A novel state-of-the-art means of modelling shear thickening fluid–impregnated fabrics is proposed in conclusion of the review of current methods. A short case study is also presented using the proposed approach of modelling.

Dynamic compressive response of 3D GFRP composites with shear thickening fluid (STF) matrix as cushioning materials

2021 ◽  
pp. 002199832098424
Author(s):  
Mohsen Jeddi ◽  
Mojtaba Yazdani
Keyword(s):  
Shear Thickening ◽  
Low Velocity Impact ◽  
Gfrp Composites ◽  
High Concentration ◽  
Low Velocity ◽  
Shear Thickening Fluid ◽  
Compressive Response ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Shear Thickening Fluids

Whereas most previous studies have focused on improving the penetration resistance of Shear Thickening Fluids (STFs) treated composites, in this study, the dynamic compressive response of single and multi-ply 3 D E-Glass Fiber Reinforced Polymer (GFRP) composites with the STF matrix was investigated by using a drop-weight low-velocity impact test. The experimental results revealed the STF improved the compressive and cushioning performance of the composites such that with increasing its concentration, further improvement was observed. The five-ply composite containing the STF of 30 wt% silica nanoparticles and 1 wt% carbon nanotubes (CNTs) reduced the applied peak force by 56% and 26% compared to a steel plate and five-ply neat samples, respectively. A series of repeated impacts was performed, and it was found that the performance of high-concentration composites is further decreased under this type of loading.

Optimal designing of soft body armour materials using shear thickening fluid

2013 ◽  
Vol 46 ◽  
pp. 191-198 ◽  
Author(s):  
Abhijit Majumdar ◽  
Bhupendra Singh Butola ◽  
Ankita Srivastava
Keyword(s):  
Shear Thickening ◽  
Soft Body ◽  
Shear Thickening Fluid ◽  
Body Armour ◽  
Optimal Designing
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