High velocity impact and armour design

Iannucci, L.; Pope, D.J.

doi:10.3144/expresspolymlett.2011.26

Cited by 61 publications

(24 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, tensile tests have been conducted on HB26 (HB26 and HB80 are both made of SK76 yarns) for [0/90] laminate 9 with dog-bone specimens to minimize gripping issues. The tensile strength was found to increase to about 750 MPa; however, the failure strain was lower than the values reported earlier in Iannucci et al 12 and Iannucci and Pope 13 These tests 9 were conducted at low strain rates (10 -4 to 10 -2 /s). Dyneema laminate has a strain-rate-dependent stress-strain curve in the low strain rate regime.…”

Section: 13mentioning

confidence: 65%

Modeling Ballistic Response of Ultra-High-Molecular-Weight Polyethylene (UHMWPE)

Zhang¹,

Satapathy²,

Vargas-Gonzalez³

et al. 2016

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)July 2016 ARL-TR-7723 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis report presents a numerical model that captures various aspects of ballistic behavior of ultra-high-molecular-weight polyethylene, such as ballistic limit V50, back-face deformation (BFD) profile, remaining thickness of intact material, and interior delamination. The roles of fiber tension/shear and crush failure were investigated using a finite element model. Delamination due to matrix material failure at the interface between adjacent layers was investigated using a tiebreak contact algorithm. Parametric analyses were carried out to identify sensitive parameters that affected the material response to ballistic loading conditions. The results suggest that better helmet material needs to have higher interlaminar tensile strength, transverse Young's modulus, and crush strength and smaller transverse shear modulus and damage softening parameters. The parametric study also indicated that higher in-plane shear modulus resulted in lower V50 and lower BFD. A set of material parameters was identified that best fit the V50, BFD profile, remaining thickness of intact composites, and delamination failure observed in the experiments. Approved for public release; distribution is unlimited. SUBJECT TERMSiii

show abstract

Section: 13mentioning

confidence: 65%

Modeling Ballistic Response of Ultra-High-Molecular-Weight Polyethylene (UHMWPE)

Zhang¹,

Satapathy²,

Vargas-Gonzalez³

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The V 50 ballistic limit should be obtained for each of the hybrids, during trials employing larger panels in order to rule out the influence of edge effects. Also, Digital Image Correlation should be implemented in such trials in order to provide more quantitative data for validation of numerical models [25]. Such numerical models may be able to virtually investigate the design space and predict solutions which may not be obvious.…”

Section: Discussionmentioning

confidence: 99%

Design and Ballistic Performance of Hybrid Composite Laminates

Ćwik¹,

Iannucci²,

Curtis

et al. 2016

Appl Compos Mater

View full text Add to dashboard Cite

This paper presents an initial design assessment of a series of novel, cost-effective, and hybrid composite materials for applications involving high velocity impacts. The proposed hybrid panels were designed in order to investigate various physical phenomenon occurring during high velocity impact on compliant laminates from a previous study on Dyneema® and Spectra®. In the first, screening phase of the study twenty different hybrid composite laminates were impacted with 20 mm Fragment Simulating Projectiles at 1 km/s striking velocity. The best performing concepts were put forward to phase II with other hybrid concepts involving shear thickening fluids, commonly used in low velocity impacts. The results indicated that it is possible to design hybrid laminates of similar ballistic performance as the reference Dyneema® laminate, but with lower material costs. The optimal hybrid concept involves a fibre reinforced Polypropylene front and a Dyneema® backing.

show abstract

“…Such measurements have been used to develop continuum models (e.g. [35,40,41]) to enable the modelling of the penetration resistance, but these typically have a narrow range of validity in terms of projectile type, armor geometry, etc. and more importantly give little insight into the physical basis of the scaling relation proposed by…”

Section: Impact Response Of Polymer Matrix Compositesmentioning

confidence: 99%

Mechanisms of Dynamic Deformation and Failure in Ultra-High Molecular Weight Polyethylene Fiber-Polymer Matrix Composites

O’Masta¹

View full text Add to dashboard Cite

i Ultra-high molecular weight polyethylene (UHMWPE) molecules, with molecular weights approaching 10 7 Da and lengths approaching 10 μm, can be gel spun and drawn into highly crystalline fibers with more than 95% of the molecules oriented in the fiber direction. The very high tensile strength (approaching 4 GPa) and elastic modulus (200 GPa) combined with a very low density (970 kg m -3 ) result in a fiber with very high specific strength and modulus. While the strength per unit mass of the materials in the fiber direction is ~25 times greater than that of conventional steels, weak (van der Waals) bonds between molecules leads to strengths transverse to the fibers of only a thousandth that in the fiber direction. This weak intermolecular strength also leads to creep deformation under prolonged loading at ambient temperatures, and complete failure of the polymer when the intermolecular bonds "melt" at 155°C. These materials are therefore used in weight sensitive applications, where a high uniaxial stress must be supported for relatively short periods of time. Examples include mooring cables, the sails of racing ships and ballistic impact protection panels. For ballistic applications, the The dissertation also investigated the mechanisms of projectile penetration during impact of UHMWPE fiber-reinforced composites with a spherical projectile using model targets designed to dynamically load the laminates in different ways. The response of the samples were studied using a combination of synchronized high speed photography with three cameras, and 3D digital image correlation together with post-test characterization via X-ray tomography and optical microscopy. It was found that a rear supported laminate, which was prevented from deflecting, was progressively penetrated by the projectile. Since the projectile applied only a compressive pressure to the laminate, it is To my wife, Brenna, you have sacrificed more than anyone in this pursuit. I can never repay all that you have given, your love, affection, advice and support, and all of the sleep, weekends and time apart (both physically and mentally) that we have lost. Igive you my deepest and most humble thank you.

show abstract

High velocity impact and armour design

Cited by 61 publications

References 13 publications

Modeling Ballistic Response of Ultra-High-Molecular-Weight Polyethylene (UHMWPE)

Modeling Ballistic Response of Ultra-High-Molecular-Weight Polyethylene (UHMWPE)

Design and Ballistic Performance of Hybrid Composite Laminates

Mechanisms of Dynamic Deformation and Failure in Ultra-High Molecular Weight Polyethylene Fiber-Polymer Matrix Composites

Contact Info

Product

Resources

About