A non-linear orthotropic hydrocode model for ultra-high molecular weight polyethylene in impact simulations

Lässig, Torsten; Nguyen, Long H.; May, Michaël; Riedel, Werner; Heisserer, Ulrich; Werff, H. van der; Hiermaier, Stefan

doi:10.1016/j.ijimpeng.2014.07.004

Cited by 129 publications

(128 citation statements)

References 34 publications

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“…Green-elastic curve for 1% plastic strain, assuming the Young modulus from the first unload-second load and the directions perpendicular to it are, on average, zero. Thus, we confirm the assumption made in [3] and the data of [5], 1 and contradict the data of [4], who gave the value 0.3 for this coefficient.…”

Section: Zero Degree Tension Experimentssupporting

confidence: 87%

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On the Constitutive Law for the Mechanical Quasi-static Response of Criss-Cross Composites (on the Example of UHMWPE)

Alil

Арригони

Badea³

et al. 2017

Hum Factors Mech Eng Def Saf

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-significantly different Poisson ratios between the fibre direction/perpendicular-to-the-fibre direction and the two perpendiculars to the fibre directions; -ply thicknesses between 30 and 70 μm.A constitutive anisotropic elasto-plastic law for this class of materials is proposed, and its validity with reference to Tensylon™ is verified experimentally. Satisfactory agreement is reached, and the viscous nature of the deviations between the model proposed and the experimental results is revealed.

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Section: Zero Degree Tension Experimentssupporting

confidence: 87%

“…ν = 0.31 ± 0.03, that is to be compared with the guess 0.5 in [3] and 0.4 in [4]. The measured value is non-negligibly lower than 0.5 proposed by [5].…”

Section: Zero Degree Tension Experimentsmentioning

confidence: 50%

On the Constitutive Law for the Mechanical Quasi-static Response of Criss-Cross Composites (on the Example of UHMWPE)

Alil

Арригони

Badea³

et al. 2017

Hum Factors Mech Eng Def Saf

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“…[9], numerical simulations of 15 kg/m 2 Dyneema® HB26 panels impacted by 6 mm diameter aluminum spheres between 2052 m/s to 6591 m/s were shown to provide very good agreement with experimental measurements of the panel ballistic limit and residual velocities, see Fig. 4.…”

Section: Modellingsupporting

confidence: 56%

“…Lässig et al [9] conducted extensive experimental characterization of Dyneema® HB26 UHMW-PE composite for application in the continuum non-linear orthotropic material model, and validated the derived material parameters through simulation of spherical projectile impacts at hypervelocity. The target geometry is homogenized.…”

Section: Introductionmentioning

confidence: 99%

“…Nguyen et al [10] evaluated and refined the modeling approach and material model parameter set developed in [9] for the simulation of impact events from 400 m/s to 6600 m/s. Across this velocity range, the sensitivity of the numerical output is driven by different aspects of the material model, e.g., the strength model in the ballistic regime and the equation of state (EoS) in the hypervelocity regime.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of simulation methodologies for ultra-high–molecular-weight polyethylene

Ramezani¹,

Rothe²

2018

Int. J. SAFE

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This work deals with numerical simulations of impact problems on fiber-based composite armor using the commercial finite-element-code ANSYS AUTODYN. Having presented some basic knowledge on the theory of numerical simulation in AUTODYN, two recently published approaches for modeling impact on the selected composite (Dyneema® HB26) are explained. Although both of them make use of a nonlinear-orthotropic material model implemented in the AUTODYN-code, they differ in the way how the highly inhomogeneous microstructure of HB26 is represented geometrically. Lässig chooses a fully homogeneous description, whereas Nguyen discretizes the composite into sublaminates, which are kinematically joined at the surfaces and breakable when a certain contact-stress is reached. In order to validate the two approaches, the response of HB26-samples impacted by handgun-projectiles was determined experimentally and compared to the corresponding numerical results. Unfortunately, a poor agreement between experimental and numerical results was found, which gave rise to the development of an alternative modeling approach. In doing so, the composite was subdivided into alternating layers of two different types. While the first type of layers was modeled with open-literature properties of UHMWPE-fibers, polymer-matrix-behavior was assigned to the second type. Having adjusted some of the parameters, good agreement between experiment and simulation was found with respect to residual velocity and depth of penetration for the considered impact situations.

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Study on the Effect of the Molding Process and Service Temperature on the Mechanical Properties and Low‐Velocity Impact Performance of the Ultra‐High Molecular Weight Polyethylene Fiber Laminates

Bao,

Yan,

Wang

et al. 2024

Adv Eng Mater

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The ultra‐high molecular weight polyethylene fiber laminates were prepared by hot pressing at temperatures ranging from 120 °C to 140 °C and pressures of 15 MPa and 25 MPa. Mechanical test results demonstrated that increasing the molding temperature improved the interlaminar shear strength, in‐plane shear strength, and bending strength of the laminates. Additionally, the in‐plane tensile properties of the laminate were influenced by both the positive effect of increased bond strength and the negative effect of reduced fiber strength. The mechanical properties of the laminate showed improvements at −50 °C but decreased at 70 °C. Low‐velocity impact tests revealed that higher molding temperature and pressure enhanced the dynamic bending stiffness and peak force while reducing the bulge in the laminate’s back. Remarkably different low‐velocity impact performance was observed in the laminate at −50° C and 70° C compared to room temperature.This article is protected by copyright. All rights reserved.

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A non-linear orthotropic hydrocode model for ultra-high molecular weight polyethylene in impact simulations

Cited by 129 publications

References 34 publications

On the Constitutive Law for the Mechanical Quasi-static Response of Criss-Cross Composites (on the Example of UHMWPE)

On the Constitutive Law for the Mechanical Quasi-static Response of Criss-Cross Composites (on the Example of UHMWPE)

Investigation of simulation methodologies for ultra-high–molecular-weight polyethylene

Study on the Effect of the Molding Process and Service Temperature on the Mechanical Properties and Low‐Velocity Impact Performance of the Ultra‐High Molecular Weight Polyethylene Fiber Laminates

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