Quasi-static and high strain rate response of Kevlar reinforced thermoplastics

Chouhan, Hemant; Bhalla, Neelanchali Asija; Bandaru, Aswani Kumar; Gebremeskel, Shishay Amare; Bhatnagar, Naresh

doi:10.1016/j.polymertesting.2020.106964

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…[ 37–40 ] However, the efficacy of PEI as a matrix material for ballistic materials development is established in the literature. [ 41 ]…”

Section: Introductionmentioning

confidence: 99%

“…[37][38][39][40] However, the efficacy of PEI as a matrix material for ballistic materials development is established in the literature. [41] UHMWPE is a low-density composite system possessing excellent ballistic resistance. [14,42] Testing of UHMWPE and aramid fabrics of different grades of Dyneema and Twaron revealed that UHMWPE fibers are better for ballistic resistance over other types of fibers.…”

Section: Introductionmentioning

confidence: 99%

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An experimental investigation into the mechanical behavior of UHMWPE and basalt polyetherimide bonded composites at high strain rates

et al. 2022

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Material systems capable of handling both the ballistic impact and blast waves are necessary for security forces. In this study, the high strain rate performance of monolithic and bonded ultra-high molecular weight polyethylene (UHMWPE) with high-temperature resistant basalt/polyetherimide (B/PEI) composite is presented. Individual composite laminates were fabricated using vacuum-assisted compression molding. Subsequently, cylindrical test coupons were cut using a high-pressure waterjet. A suitable adhesive grade was used for the bonding of two different composite types. The dynamic compression studies were conducted on a split-Hopkinson pressure bar (SHPB). For identical incident energies, the range of strain rates attained by monolithic UHMWPE, B/PEI and bonded composites differed significantly. Monolithic UHMWPE achieved the highest rates of loading, whereas higher stresses were recorded for the B/PEI composite. Yet, monolithic UHMWPE, owing to higher constant stress plastic flow, results in higher toughness. Bonded composites revealed hybrid properties with delamination of UHMWPE as the primary failure mode. High-speed imaging exposed severe deformation of UHMWPE during dynamic compression. SEM micrographs revealed fiber pull-out and deforming behavior of UHMWPE and brittle failure of B/PEI composite. B/PEI in a bonded composite system never failed under dynamic compression within the experimental range, thus providing a window of opportunity to tailor-make better ballistic and blast protection materials.

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“…[ 37–40 ] However, the efficacy of PEI as a matrix material for ballistic materials development is established in the literature. [ 41 ]…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An experimental investigation into the mechanical behavior of UHMWPE and basalt polyetherimide bonded composites at high strain rates

et al. 2022

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“…The HSR properties, including peak stress, increased with higher strain rates while strain at peak stress decreased. Few researchers studied the HSR response of thermoplastic composites considering E-glass/polypropylene [19] Kevlar/ polyethylene, [20,21] Kevlar/polypropylene, [1,22,23] and a hybrid combination of Kevlar/basalt with polypropylene, [2] UHMWPE. [24,25] In all these studies, the thermoplastic polymers considered were polyethylene, polypropylene and polyurethane.…”

Section: Introductionmentioning

confidence: 99%

Effect of weave pattern on high strain rate performance of glass/polytetrafluoroethylene composites

et al. 2022

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An investigation of the effect of strain rate on the dynamic compressive behavior of glass/polytetrafluoroethylene (PTFE) composite is presented. Experimental studies were carried out on two dimensional (2D), satin weave (SW) and three dimensional (3D) woven glass/PTFE composites using split Hopkinson pressure bar (SHPB) apparatus. Commercial grades of glass/PTFE fabrics were autoclaved to prepare the composite laminates and circular specimens were cut out using a high-pressure water jet. High strain rate studies confirmed the rate-dependent behavior of all the woven composite systems under consideration. The highest rates of loading were attained by 3D woven specimens for identical incident energies. The highest peak stress attained by 3D woven specimens was 501 MPa, which was trailed by 2D woven specimens with 482 MPa stress. The advantage of satin weave was not reflected in the small specimens as the peak stress attained for identical loading was limited to 405 MPa. Similarly, the highest strain and toughness were recorded for 3D woven composites. However, the SW pattern unlocked a new possibility of controlling the primary damage axis. Furthermore, an analytical method is presented based on variable rate power law to predict the dynamic compressive stress of glass/PTFE.

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Mechanical behavior of hybrid glass‐flax‐carbon fiber‐reinforced polymer composites under static and dynamic loading

Mabrouk,

Khair‐Eldeen,

Hassanin

et al. 2024

Polymer Composites

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The present study investigates the quasi‐static and dynamic mechanical properties of the composite laminates reinforced by flax hybridized with E‐glass and/or carbon fabrics. Epoxy resin was used as the polymeric matrix. Three different hybrid composite laminates were prepared: Glass/flax (HGF), carbon/flax (HCF), and carbon/glass/flax (HCGF) composite laminates. Non‐hybrid flax composite laminate (NHF) was prepared as a reference material. The quasi‐static mechanical properties were investigated by performing tensile and flexural tests. The dynamic mechanical behavior was evaluated using the split Hopkinson pressure bar test and dynamic mechanical analysis technique. The results showed that hybridizing flax with glass and/or carbon fibers significantly enhanced both the quasi‐static and dynamic mechanical properties of the composite system. Due to hybridization, the tensile strength increased from 50.5 MPa for NHF to 71.5, 162, and 107 MPa for HGF, HCF, and HCGF, respectively. Similarly, the flexural strength increased from 33.4 MPa for NHF to 104, 149, and 112 MPa for HGF, HCF, and HCGF, respectively. All the composite laminates showed a strain rate‐dependent behavior when tested using the SHPB test. Moreover, the dynamic compressive strength was substantially improved due to hybridization. DMA results showed that hybridization significantly improved the storage modulus and loss modulus of hybrid composites.Highlights Polymer composites reinforced with flax fabric hybridized with glass and/or carbon fabrics were fabricated. The fabricated hybrid composites were subjected to quasi‐static mechanical tests (tensile and flexural) and dynamic mechanical tests (DMA and SHPB). The hybridization approach was effective in improving the static and dynamic mechanical properties of hybrid composites. The static and dynamic behavior of hybrid composites can be tailored by controlling the type of synthetic fibers hybridized with natural ones.

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Quasi-static and high strain rate response of Kevlar reinforced thermoplastics

Cited by 11 publications

References 22 publications

An experimental investigation into the mechanical behavior of UHMWPE and basalt polyetherimide bonded composites at high strain rates

An experimental investigation into the mechanical behavior of UHMWPE and basalt polyetherimide bonded composites at high strain rates

Effect of weave pattern on high strain rate performance of glass/polytetrafluoroethylene composites

Mechanical behavior of hybrid glass‐flax‐carbon fiber‐reinforced polymer composites under static and dynamic loading

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