Ultra High Strength, High Modulus Polyethylene Spectra Fibers and Composites

Kavesh, S.; Prevoršek, D. C.

doi:10.1080/00914039508031459

Cited by 69 publications

(53 citation statements)

References 19 publications

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“…At ballistic loading rates the fiber modulus values obtained were about half those obtained by Prevorsek et al [20] and Field and Sun [27], though were consistent with the high strain-rate values obtained by Lim et al [13]. Later on, Kavesh and Prevorsek [28] referred to an unpublished report wherein a Young's modulus of 230 GPa was calculated from a directly measured, tensile wave-speed in Spectra ® fiber, though the exact version and level of pre-tension was not specified.…”

Section: Experiments On Ballistically Measured Yarn Modulus and Strensupporting

confidence: 67%

Modeling and Experiments on Ballistic Impact into UHMWPE Yarns Using Flat and Saddle-Nosed Projectiles

Phoenix

Heisserer

Werff

et al. 2017

Fibers

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Abstract:Yarn shooting experiments were conducted to determine the ballistically-relevant, Young's modulus and tensile strength of ultra-high molecular weight polyethylene (UHMWPE) fiber. Target specimens were Dyneema ® SK76 yarns (1760 dtex), twisted to 40 turns/m, and initially tensioned to stresses ranging from 29 to 2200 MPa. Yarns were impacted, transversely, by two types of cylindrical steel projectiles at velocities ranging from 150 to 555 m/s: (i) a reverse-fired, fragment simulating projectile (FSP) where the flat rear face impacted the yarn rather than the beveled nose; and (ii) a 'saddle-nosed projectile' having a specially contoured nose imparting circular curvature in the region of impact, but opposite curvature transversely to prevent yarn slippage off the nose. Experimental data consisted of sequential photographic images of the progress of the triangular transverse wave, as well as tensile wave speed measured using spaced, piezo-electric sensors. Yarn Young's modulus, calculated from the tensile wave-speed, varied from 133 GPa at minimal initial tension to 208 GPa at the highest initial tensions. However, varying projectile impact velocity, and thus, the strain jump on impact, had negligible effect on the modulus. Contrary to predictions from the classical Cole-Smith model for 1D yarn impact, the critical velocity for yarn failure differed significantly for the two projectile types, being 18% lower for the flat-faced, reversed FSP projectile compared to the saddle-nosed projectile, which converts to an apparent 25% difference in yarn strength. To explain this difference, a wave-propagation model was developed that incorporates tension wave collision under blunt impact by a flat-faced projectile, in contrast to outward wave propagation in the classical model. Agreement between experiment and model predictions was outstanding across a wide range of initial yarn tensions. However, plots of calculated failure stress versus yarn pre-tension stress resulted in apparent yarn strengths much lower than 3.4 GPa from quasi-static tension tests, although a plot of critical velocity versus initial tension did project to 3.4 GPa at zero velocity. This strength reduction (occurring also in aramid fibers) suggested that transverse fiber distortion and yarn compaction from a compressive shock wave under the projectile results in fiber-on-fiber interference in the emerging transverse wave front, causing a gradient in fiber tensile strains with depth, and strain concentration in fibers nearest the projectile face. A model was developed to illustrate the phenomenon.

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Section: Experiments On Ballistically Measured Yarn Modulus and Strensupporting

confidence: 67%

Modeling and Experiments on Ballistic Impact into UHMWPE Yarns Using Flat and Saddle-Nosed Projectiles

Phoenix

Heisserer

Werff

et al. 2017

Fibers

View full text Add to dashboard Cite

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“…Presumably, incorporation of uniformly dispersed and aligned CNTs in polymer matrix can provide polymer composites with dramatically improved strength and modulus in their machine direction. These expectations have recently been confirmed by a number of studies [26][27][28][29][30][31][32][33][34][35]. Our recent investigation [32][33][34] found that the achievable draw ratios (D ra ) of UHMWPE/carbon nanotubes (CNTs) asprepared fibers prepared near the optimal UHMWPE concentration improve consistently and reach a maximal value as their CNT and/or functionalized CNT contents increase up to an optimal value, respectively.…”

Section: Introductionsupporting

confidence: 56%

“…Several authors [16,[18][19][20][21][22] reported that the drawing temperature and rate could markedly affect the maximal achievable draw ratio and tensile properties of solution-grown UHMWPE samples. In addition to the gel solution compositions and drawing conditions, it is generally recognized that the conditions used in the formation process after spinning and/or solution casting of gel solutions can also have a significant influence on the morphology, microstructure and drawing properties of the specimens formed during the above mentioned processes [2,19,[23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Ultradrawing properties of ultra-high molecular weight polyethylene/hydrochloric acid treated attapulgite fibers

et al. 2013

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“…Ultra high molecular weight polyethylene (UHMWPE) has been extensively used for various high performance application areas as biomedical, defence, etc [1,2]. However, its adverse properties such as creep, abrasion resistance, etc.…”

Section: Introductionmentioning

confidence: 99%

Graphene reinforced ultra high molecular weight polyethylene with improved tensile strength and creep resistance properties

Bhattacharyya¹,

Chen²,

Zhu³

2014

Express Polym. Lett.

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Abstract. Reduced graphene oxide or graphene was dispersed in ultra high molecular weight polyethylene (UHMWPE) using two methods to prepare nanocomposite films. In pre-reduction method, graphite oxide (GO) was exfoliated and dispersed in organic solvents and reduced to graphene before polymer was added, while reduction of graphene oxide was carried out after polymer addition for in situ reduction method. Raman spectroscopic study reveals that the second method results in better exfoliation of graphene but it has more amorphous content as evident from selected area electron diffraction (SAED) pattern, wide angle X-ray and differential scanning calorimetry (DSC). The nanocomposite film produced by prereduction method possesses higher crystallinity (almost the same as that of the pure film) as compared to the in situ method. It shows better modulus (increased from 864 to 1236 MPa), better strength (increased from 12.6 to 22.2 MPa), network hardening and creep resistance (creep strain reduced to 9% from 50% when 40% of maximum load was applied for 72 h) than the pure film. These findings show that graphene can be used for reinforcement of UHMWPE to improve its tensile and creep resistance properties.

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Ultra High Strength, High Modulus Polyethylene Spectra Fibers and Composites

Cited by 69 publications

References 19 publications

Modeling and Experiments on Ballistic Impact into UHMWPE Yarns Using Flat and Saddle-Nosed Projectiles

Modeling and Experiments on Ballistic Impact into UHMWPE Yarns Using Flat and Saddle-Nosed Projectiles

Ultradrawing properties of ultra-high molecular weight polyethylene/hydrochloric acid treated attapulgite fibers

Graphene reinforced ultra high molecular weight polyethylene with improved tensile strength and creep resistance properties

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