Ductility of selected metals under electromagnetic ring test loading conditions

Janiszewski, Jacek

doi:10.1016/j.ijsolstr.2012.01.005

Cited by 70 publications

(32 citation statements)

References 10 publications

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“…From the pioneering work of Niordson (1965), the capability of the expanding rings method to determine fragmentation characteristics of ductile materials has been exploited by several laboratories (Grady and Brenson, 1983;Gourdin, 1989;Altynova et al, 1996;Hu and Daehn, 1996;Juanicotena and Llorca, 1997;Grady and Olsen, 2003;Ravi-Chandar, 2006, 2008;Janiszewski and Pichola, 2009;Janiszewski, 2012). Within the typical range of expansion velocities attained in this test -from 50 to 300 m/s -the experimental results show that the strain to failure of ductile materials is enhanced by the expansion velocity Altynova et al, 1996;Janiszewski, 2012). Moreover, the failure pattern is revealed velocity dependent too, leading to an increasing number of necks and fragments with testing velocity.…”

Section: Introductionmentioning

confidence: 99%

Identification of the critical wavelength responsible for the fragmentation of ductile rings expanding at very high strain rates

Rodríguez-Martínez

Vadillo

Fernández-Sáez

et al. 2013

Journal of the Mechanics and Physics of Solids

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A. (2013). Identification of the critical wavelength responsible for the fragmentation of ductile rings expanding at very high strain rates. Solids, 61, 6, 1357- Journal of the Mechanics and Physics of ández-Sáez tériaux UniversitéThis work examines the mechanisms governing the fragmentation of ductile rings expanding at very high strain rates. Based on previous works three different methodologies have been addressed, namely: fully 3D finite element computations of the radial expansion of ductile rings, numerical simulations of unitary axisymm etric cells with sinusoidal spatial imperfections subjected to tensile loading and a linear perturbation technique derived within a quasi-1D theoretical framework. The results derived from these three different approaches allow for identification of a critical wavelength which dictates the fragmentation of ductile rings expanding at very high strain rates. This critical wavelength is revealed quite independent of the material properties but closely related to the ratio (L 0 /ϕ 0 ) critical ≈1:5 where L 0 is the fragment size and ϕ 0 is the diameter of the circular section of the ring. This work highlights the fundamental role played by material inertia in the fragmentation at very high strain rates, setting aside the mechanisms associated to the classical statistical theories.

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Section: Introductionmentioning

confidence: 99%

Identification of the critical wavelength responsible for the fragmentation of ductile rings expanding at very high strain rates

Rodríguez-Martínez

Vadillo

Fernández-Sáez

et al. 2013

Journal of the Mechanics and Physics of Solids

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“…Video cameras were placed at the same level to ensure 3D-registration in controlled experiments. The angle between the optical axes of cameras was 90 0 [10,11].…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…There are two high-speed (up to 10 5 fps) cameras in our setup: "Phantom V411" and "Phantom Miro M310". In contrast to our previous experiments [7][8][9], we used software "Tema Automotive" [10,11] for data processing from video recordings. With the help of this software we could observe a continuously moving water bomb or individual droplets.…”

Section: Introductionmentioning

confidence: 99%

Features of the Transformation of Small Water Droplets and Large Water Bombs in Free Fall

Волков

2015

MATEC Web of Conferences

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Abstract. This paper presents a series of experimental studies to determine the basic characteristics and features of the transformation of small water droplets (3-6 mm) and large water bombs (50-100 mm) in free fall. Investigations have been carried out using cameras "Phantom V411" and "Phantom Miro M310". Software "Tema Automotive" have been used for data processing from video recordings. The regulations of the surface transformations of small droplets and large water bombs have been established. The stages of transformation (disintegration) have been established for large water bombs. The mechanisms of deformation have been defined for small droplets. The characteristic times have been determined for the defined stages of transformation. The study demonstrates the influence of the initial size of droplets and water bombs on the times and velocities of considered processes.

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“…Data processing and the subsequent analysis of obtained results were performed using special software "Phantom Camera Control" ("PCC"), and a software system with the function of continuous monitoring "Tema Automotive" [10,11].…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Further application of software complex "Tema Automotive" with special built-in algorithms for continuous tracking "Correlation" and "Circular Symmetry" [10,11] allowed us to visualize the motion path of each droplet in the observed area, to determine the vertical distance between droplets, the horizontal trajectory deflections of droplets, and the speed and size of droplets.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

The Difference between the Integral Characteristics of Two and Three Water Droplets Moving Sequentially through High-Temperature Combustion Products and Air

Волков

Voitkov

Забелин

et al. 2015

MATEC Web of Conferences

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Abstract. This paper focuses on the study of macroscopic regularities that describe how moving droplets influence on the evaporation of subsequent droplets in high-temperature gases (1100 K) and air at moderate temperatures (about 300 K). Experiments have been conducted by means of high-speed video recording and using specialized software. Investigations have been performed for two and three successive droplets with the initial radius of 1.5 mm. The effect of droplet braking, coagulation and acceleration has been defined. The typical difference between velocities, sizes and distances of successive droplets has been demonstrated.

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Ductility of selected metals under electromagnetic ring test loading conditions

Cited by 70 publications

References 10 publications

Identification of the critical wavelength responsible for the fragmentation of ductile rings expanding at very high strain rates

Identification of the critical wavelength responsible for the fragmentation of ductile rings expanding at very high strain rates

Features of the Transformation of Small Water Droplets and Large Water Bombs in Free Fall

The Difference between the Integral Characteristics of Two and Three Water Droplets Moving Sequentially through High-Temperature Combustion Products and Air

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