The use of symmetric Taylor impact to validate constitutive models for an fcc metal (copper) and a bcc alloy (RHA steel)

Forde, L.C.; Walley, S. M.; Peyton-Jones, M.; Proud, W. G.; Cullis, I.G.; Church, P.

doi:10.1051/dymat/2009175

Cited by 6 publications

(6 citation statements)

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“…This technique was originally developed during the Second World War for estimating the dynamic compressive mechanical properties of metals . In its modern use for validating constitutive models, high‐speed photography is used in order to follow the progress of the deformation . High‐speed photography is essential if relaxation occurs after impact such as occurs with polymers .…”

Section: Methods Of Studying the Dynamic Properties Of Glassmentioning

confidence: 99%

“…At present, the only data obtainable from the Taylor test for validating constitutive models for both brittle and ductile materials are (i) the specimen profile as a function of time (see also Figures and ) and (ii) post‐test examination of void growth and other damage . However, it is possible that various X‐ray techniques may soon provide data on internal damage mechanisms as they are occurring .…”

Section: Methods Of Studying the Dynamic Properties Of Glassmentioning

confidence: 99%

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An Introduction to the Properties of Silica Glass in Ballistic Applications

Walley

2013

Strain

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The purpose of this review is to introduce the interested reader to the literature on the use of silica glasses in ballistic applications. These applications include optically transparent windows (where their amorphous nature, appropriate band gap, and cheapness make them ideal window materials) as well as layers in opaque armours designed to be resistant to shaped charges. In the latter application, their increase in volume (bulking) on fracture disrupts the shaped charge jet. Other topics covered in this review include low‐velocity damage by windborne debris, liquid and solid impact, dynamic methods of testing (Hopkinson pressure bar, Taylor impact, and plate impact shock loading), and constitutive models. The use of glass as a shaped charge is also discussed.

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Section: Methods Of Studying the Dynamic Properties Of Glassmentioning

confidence: 99%

Section: Methods Of Studying the Dynamic Properties Of Glassmentioning

confidence: 99%

An Introduction to the Properties of Silica Glass in Ballistic Applications

Walley

2013

Strain

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“…Previous researchers have used sabots to deliver the projectile rod to the target [3][4][5][6][7][8]. However, a sabot that only contains the rear section of a rod [9] will need to hold the rod firmly.…”

Section: Experimental Designmentioning

confidence: 99%

A novel technique for performing symmetric Taylor impact

Walley

Taylor

Williamson

et al. 2015

EPJ Web of Conferences

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Abstract.A novel spring tensioned wire cradle arrangement has been developed to hold the target rod lightly but firmly in place when performing rod-on-rod (symmetric Taylor) impact in a vacuum. In addition, a soft capture system has been designed and used to decelerate both rods while reducing the chance of them colliding a second time. High-speed photography was used to obtain the profile of a pure aluminium target rod as a function of time. Photon Doppler Velocimetry (PDV) was also deployed to record the velocity of the rear of the target rod as a function of time. Voiding in the interior of recovered rods was investigated non-destructively using X-ray tomography. The data provides comprehensive validation information for predictive constitutive models.

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“…2 Recently, one of the main purposes of the Taylor's test has been to validate the constitutive relations used in explicit finite element solvers such as LS-DYNA and ABAQUS/Explicit by comparing the predicted postimpact deformation behaviour of the Taylor projectile with experiment. Forde et al 3 outlined the use of symmetric Taylor impact tests for the validation of constitutive models of copper and Rolled Homogeneous Armour steel. They also made predictions of rod/projectile deformation profiles using the Armstrong-Zerilli constitutive model within a Lagrangian finite element code and found excellent correlation between test and computed results for both materials.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the effect of the yield drop phenomenon on the deformation behaviour of a Taylor projectile

Munusamy

Barton

Childs

2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article deals with the effects of parameters relating to the yield drop phenomenon on the deformation of Taylor projectiles. The numerical modelling approach performed using LS-DYNA was validated by considering a solid cylindrical projectile made of AA7010 aluminium alloy impacted against a massive, rigid target as described in the literature. Both the projectile and target were modelled using three-dimensional brick elements. A popular strain rate and temperature-dependent constitutive relation known as the Johnson–Cook model was used to represent the alloy projectile material behaviour, whilst the target plate was assumed to be rigid. A generally good agreement between test and numerical results was found. A steel projectile was then considered using a simple piecewise linear plasticity model which has provision for introducing the yield drop effect and in which temperature effects were ignored. The impact velocities varied from 200 to 1000 m/s. Significant influence of the yield drop on the deformation behaviour of the projectile at low impact velocities was found. However, the effect was far less significant at higher impact velocities (>400 m/s).

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The use of symmetric Taylor impact to validate constitutive models for an fcc metal (copper) and a bcc alloy (RHA steel)

Cited by 6 publications

References 0 publications

An Introduction to the Properties of Silica Glass in Ballistic Applications

An Introduction to the Properties of Silica Glass in Ballistic Applications

A novel technique for performing symmetric Taylor impact

Numerical study of the effect of the yield drop phenomenon on the deformation behaviour of a Taylor projectile

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