The present study aims to evaluate thin plate-injected polypropylene (PP) composites containing short aramid fibers (AF) and graphene nanoplatelets (GNPs). were manually cut a length of 10 mm added the matrix at concentration wt.%. Additionally, GNPs incorporated concentrations 0.1, 0.25, 0.5 Maleic anhydride grafted (MAPP) was used 2 wt.% improve adhesion compatibility between polymer fillers. Thermal analyses, tensile flexural tests, dynamic mechanical thermal analysis performed, followed...

This study focused on evaluating mechanical and dynamic-mechanical properties of polyaramid/vinyl ester composites, as a function the fiber content. Furthermore, split Hopkinson pressure bar technique V 50 Ballistic limit tests were performed. Composites prepared by resin transfer molding (RTM) with different content, samples being identified AD4, AD5 AD6 (with 4, 5 6 polyaramid layers, respectively). Initially, fiber, void matrix contents calculated statistically analyzed, in regions...

Abstract Nanostructured thermoplastic consisting of high‐density polyethylene (HDPE) modified with exfoliated montmorillonite (MMT) was successfully used as the matrix for development composite ballistic applications. The effect HDPE and HDPE/MMT on mechanical properties para‐aramid plain‐woven fabric‐based composites compared commercial constituted by polyvinyl‐butyral–phenolic resin matrix. dynamic compressive tests using split Hopkinson pressure bar equipment revealed a remarkable...

The application of aramid fiber composites for ballistic purposes has increased in recent years. addition graphene a polymeric matrix could boost the energy absorption and protection these composites. This study aims to investigate performance fabric multi-laminar panels with high-density polyethylene (HDPE) films containing nanoplatelets (GNP). Mechanical, dynamic-mechanical (DMA), impact, split Hopkinson pressure testing were conducted. All obtained level III-A, HDPE-0.5% GNP HDPE-1%...

Abstract Laminated polymer composites are widely used in ballistic barriers where polyethylene can be applied. The mechanical properties of polymers improved with the addition nanofillers. Therefore, this work evaluates effect combination montmorillonite Cloisite 30B (OMt) and graphene (Gr) on dynamics compression obtained from a split‐Hopkinson pressure bar (SHPB) test for nanostructured maleinized high‐density (HDPE). nanofillers incorporated into polymeric matrix its molten state, their...

The development of impact resistant hybrid composites for ballistic applications is a recent trend. increased energy absorption and reduced weight are some the advantages using these composites. Hybrid constituted ultra-high molecular polyethylene (UHMWPE) laminates aramid fiber fabrics were obtained by autoclave molding. dynamic compression test was performed Split Hopkinson pressure bar with standard deformation rate. V 50 limit carried out following military MIL-STD-662F. table NIJ...

ABSTRACT Three different ultrahigh‐molecular‐weight polyethylene (UHMWPE)–clay nanocomposites (Muscovite, Cloisite 30B and amphiphilic clay/carbon nanofibers) were investigated with the nanocomposite nanomorphology studied before after dynamic mechanical compressive tests at high strain rates. Their material structure thermal properties using techniques such as step‐scan differential scanning calorimetry, split Hopkinson pressure bar, synchrotron small angle X‐ray scattering (SAXS),...

Continuous development, improvement and innovation of ballistic material systems with superior energy absorption performance has been the subject numerous works nowadays. Some research carried out objective replacing traditional metallic ceramic materials composites high-performance polymeric composites. Due to their excellent properties, multi-scale polymer have used in most varied segments industry, being recently researched applications such as materials. This work promotes combination...

Ballistic helmets are individual armor equipment designed to protect a soldier's head from projectiles and fragments. Although very common, these responsible for several causalities due their low ballistic resistance large back face deformation stop the projectile. Therefore, enhance helmet performance, studies have focused on development of new materials protection solutions. The purpose this study was develop evaluate solution using thermoplastic-based matrices. first matrix based...

Ballistic helmets are individual pieces of armor equipment designed to protect a soldier’s head from projectiles and fragments. Although very common, these responsible for several casualties due their significant back face deformation low ballistic resistance projectiles. Therefore, enhance helmet performance, studies have focused on the development new materials protection solutions. The purpose this study was develop evaluate solution using thermoplastic-based matrices. first matrix based...

Abstract Nanofillers incorporated into polymeric matrices have gained attention for enhancing the properties of materials, particularly nanocomposites, with improvements observed in mechanical and dynamic thermal properties. Among nanofillers, calcium carbonate (NCC), montmorillonite‐type clays (MMT), graphene nanoplatelets (GNP) are prominent. The novelty this study lies investigating compression behavior using split‐Hopkinson pressure bar (SHPB) method on laminated composites prepared...

Ultra-high molecular weight polyethylene samples were submitted to dynamical compressive test in a split Hopkinson Pressure Bar. Three thickness/diameter ratio (0.11, 0.44 and 0.64) two strain rates (3250 s-1 6500 s-1) used understand how the set-up influences stress equilibrium constancy of rate during impact. Concepts equilibrium, rate, stressstrain curves mechanical properties material evaluated. All studied achieved but with smaller it more easily. Nevertheless, smallest not able achieve...

This article presents a review of the split Hopkinson pressure bar uses on evaluation polymer composites ballistic material’s dynamic mechanical properties A small introduction concerning equipment is given, followed by summarization most recent published studies relating to compressive tests used study polymeric such as Young's modulus, maximum stress, strain at tenacity and strain, well sensitivity these changes in applied rate.