The flying wedge: A method for high-strain-rate tensile testing. Part 1. Reasons for its development and general description

Sturges, John; Cole, B. N.

doi:10.1016/s0734-743x(00)00043-9

Cited by 18 publications

(9 citation statements)

References 3 publications

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“…1. Full details of the rig can be found elsewhere [1,2], but the main features are briefly described here. The cylindrical tensile specimen with threaded ends is held, through specimen holders, between a pair of sliders that have chamfered faces.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…The present paper describes procedures used to characterise these properties based on the experimental test rig known as the 'flying wedge' which is capable of producing average strain rates from 10 2 to 5 Â 10 3 s À1 and locally in excess of 10 4 s À1 [1,2]. This allows for the effect of strain rate on material behaviour to be investigated over a wider range than possible with other high rate testing methods, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the high strain rate fracture properties of ductile materials using a combined experimental/numerical approach

Barton¹

2004

International Journal of Impact Engineering

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Section: Experimental Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of the high strain rate fracture properties of ductile materials using a combined experimental/numerical approach

Barton¹

2004

International Journal of Impact Engineering

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“…A technique to carry out interrupted tensile testing at high strain rates on the flying wedge 19 was developed by Barton. 11 In order to properly characterize the necking and fracture process of the specimen bar, we introduced Barton's technique 11 on a HSTF designed by us.…”

Section: An Interrupted Impact Tension Testing To Characterize Tmentioning

confidence: 99%

An interrupted tensile testing at high strain rates for pure copper bars

Chen

Shanxing

et al. 2010

Journal of Applied Physics

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A high-speed tensile facility ͑HSTF͒ invented by us was applied to interrupting the tests for pure copper specimen bars controlled locally at different levels of elongation. It was realized to isolate and identify the different stages of the dynamic fracture process of the pure copper specimen bar under impact tension. The results of scanning electron microscopical ͑SEM͒ investigation of the recovered pure copper specimens show that the void evolution near the surface of the minimum cross-section of the necking area is more severe than that at the middle of the necking area, which may be connected with the findings discussed by Alves and Jones ͓J. Mech. Phys. Solids 47, 643 ͑1999͔͒. The constitutive models in a certain range of strain determined from the tensile split Hopkinson bar optimized by us were employed and adjusted in numerically simulating the large deformation of the pure copper specimen in the interrupted tensile tests on HSTF. The dependence of the instability strain of thermoviscoplastic materials in simple tension on material parameters delineated by Batra and Wei ͓Int. J. Impact Eng. 34, 448 ͑2007͔͒ was inspected in predicting the diffuse necking of the specimen bar. The axisymmetric necking rod model with a central void under static tension presented by Ragab ͓Eng. Fract. Mech. 71, 1515 ͑2004͔͒ was extended to predicting the local necking and fracture of the specimen bar under impact tension.

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“…Unfortunately, with the SHPB technique, neither the velocity nor the force is imposed. This inconvenience has resulted in apparatus like the flywheel [12,15] or flying wedge [2,16]. For such apparatus, the tensile loading is obtained by applying a displacement at a constant velocity.…”

Section: Introductionmentioning

confidence: 99%

Design of an Impact Loading Machine Based on a Flywheel Device: Application to the Fatigue Resistance of the High Rate Pre-straining Sensitivity of Aluminium Alloys

et al. 2007

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This paper presents a device that has been designed for tensile loading at medium impact rates (up to 10 3 s -1 ) and for performing either interrupted or failure tests. This machine allows us to apply prescribed prestraining to the specimen, and then apply subsequent loading histories such as impact fatigue. Two specimen loading systems are considered, which make it possible to carry out tests with various ranges of force and various durations of time. A multi-CCD camera system is triggered by a chosen threshold from the force signal. The system is dedicated to the displacement measurement and gives both qualitative and quantitative information about the stretching mechanism leading to fracture. To illustrate the performance of the device, experimental results concerning impact tensile tests at a strain rate of about 300 s -1 are presented, as well as consecutive impact-fatigue tests on two aluminium alloys.

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The flying wedge: A method for high-strain-rate tensile testing. Part 1. Reasons for its development and general description

Cited by 18 publications

References 3 publications

Determination of the high strain rate fracture properties of ductile materials using a combined experimental/numerical approach

Determination of the high strain rate fracture properties of ductile materials using a combined experimental/numerical approach

An interrupted tensile testing at high strain rates for pure copper bars

Design of an Impact Loading Machine Based on a Flywheel Device: Application to the Fatigue Resistance of the High Rate Pre-straining Sensitivity of Aluminium Alloys

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