Validation of a path-dependent constitutive model for FCC and BCC metals using "symmetric" Taylor impact

Walley, S. M.; Church, P.; Townsley, R.; Field, J. E.

doi:10.1051/jp4:2000912

Cited by 10 publications

(10 citation statements)

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“…However, recently there has been renewed interest in Taylor impact or its variants (such as rodon-rod impact [118]) as a method of 'exercising' constitutive relations [119,120] for a wide range of materials (see Fig. 15).…”

Section: Article In Pressmentioning

confidence: 99%

Review of experimental techniques for high rate deformation and shock studies

Field¹,

Walley²,

Proud³

et al. 2004

International Journal of Impact Engineering

663

296

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Section: Article In Pressmentioning

confidence: 99%

Review of experimental techniques for high rate deformation and shock studies

Field¹,

Walley²,

Proud³

et al. 2004

International Journal of Impact Engineering

663

296

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“…A modified path-dependent Armstrong-Zerilli constitutive model was used (Gould & Goldthorpe 2000;Walley et al 2000). The following description of the model was first published in Church et al (1999).…”

Section: (D ) Modelling Of Taylor Impactmentioning

confidence: 99%

Symmetrical Taylor impact studies of copper

2008

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An integrated investigation of rod-on-rod (symmetric Taylor) impact of annealed copper was conducted using the single-stage gas-gun facility at the Cavendish Laboratory as a validation study of the Armstrong-Zerilli constitutive model, as modified by Goldthorpe. Two main techniques were used for obtaining data from the experiments: high-speed photography (up to 20 million frames s K1 framing rate) and a velocity interferometer system for any reflector (VISAR). The symmetric configuration was used to minimize friction effects and eliminate target indentation seen in classic Taylor tests, where a rod is fired against a massive target block. However, the need for coaxial alignment of the two rods made the experiments considerably more challenging to perform than the classic case. The propagation of plasticity along the rods was monitored using high-speed photography and VISAR. It was found to propagate with a logarithmically decelerating velocity. The rod profiles and VISAR traces can be understood in terms of material properties such as strain hardening. No asymmetry between the responses of the two rods involved (moving and stationary) was observed within the resolution of the techniques employed. A modified Armstrong-Zerilli material model for copper predicted intermediate profiles well, but slightly overestimated the material strength.

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“…However, about 80 µs after impact (frame (d)) the rod begins to bulge outwards plastically some distance back from the impact face. This phenomenon has been seen before for copper [4] and is characteristic of fcc materials. In the full sequence, the rods can visibly be seen to start to separate about 200 µs after impact (340 µs after trigger) and continue to draw apart as the sequence continues (see Fig.…”

Section: Experimental Designmentioning

confidence: 71%

“…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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Validation of a path-dependent constitutive model for FCC and BCC metals using "symmetric" Taylor impact

Cited by 10 publications

References 0 publications

Review of experimental techniques for high rate deformation and shock studies

Review of experimental techniques for high rate deformation and shock studies

Symmetrical Taylor impact studies of copper

A novel technique for performing symmetric Taylor impact

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