Uniaxial Magnetic Pulse Tension of TiNi Alloy with Experimental Strain Rate Evaluation

Ostropiko, Eugeny; Magazinov, Sergey G.; Krivosheev, S. I.

doi:10.1007/s11340-022-00864-4

Cited by 4 publications

(3 citation statements)

References 44 publications

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“…The electrical scheme for testing materials for uniaxial direct tension used in this work likes to the previously used one to study the mechanical properties of the TiNi alloy [ 43 , 44 , 45 ]. The experimental setup ( Figure 2 ) consisted of pulsed current generator 1 (PCG), curved flat conductors 2, samples of the studied material

and

, a fiber-optic system including the semiconductor laser 5 with power supply unit, photodetector module 10, circulator 7 with optical fibers 6 and fiber Bragg grating 8, as well as electronic unit 11 performing conversion (ADC), signal processing, and display of measurement results on the personal computer.…”

Section: Experimental Datamentioning

confidence: 99%

“…Parameters of current pulses: duration—1–5 microseconds; the maximum value of the current in the pulse—10–100 kA. The created pressure was transferred to the sample made of the special shape in such a way that its deformable part was subjected to uniaxial direct stretching [ 44 , 45 ].…”

Section: Experimental Datamentioning

confidence: 99%

“…The pressure pulse formed in the flat conductors was calculated from the obtained current waveforms. This pressure was transferred to the sample made in a special shape in such a way that the deformable part was subjected to uniaxial direct stretching [ 44 , 45 ]. An important advantage of the described method is the possibility of regulating the strength and duration of exposure to the material under study [ 46 , 47 , 48 ], and the disadvantage is the presence of strong electromagnetic interference, which makes it difficult to use common electronic sensors to measure the parameters of such exposure [ 49 , 50 ].…”

Section: Experimental Datamentioning

confidence: 99%

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Application of Fiber Bragg Gratings as a Sensor of Pulsed Mechanical Action

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The pulsed elongation of fiber Bragg gratings is considered in order to be used to measure the displacement or deformation rate of objects. Optimal measurement modes were determined, numerical simulation of the output signal was performed during pulsed elongation or compression of the fiber grating, and the main patterns were analyzed. The results of the application of the Bragg gratings for the experimental determination of the deformation rate of materials under pulsed magnetic action are presented. Experimentally obtained and theoretical dependencies are compared. The dependencies of the change in the grating parameters—the coefficient and the half-width of the reflection spectrum with successive shortening of the grating—are given.

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and

Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

Section: Experimental Datamentioning

confidence: 99%

See 1 more Smart Citation

Application of Fiber Bragg Gratings as a Sensor of Pulsed Mechanical Action

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Design of a novel high-speed tensile method for testing the high strain rate tensile behavior of aluminum alloys

Chen,

Shi,

et al. 2024

Review of Scientific Instruments

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The high-strain rate mechanical behavior of aluminum alloys is crucial for the stability of electromagnetic launch systems. However, current high-strain rate testing methods are not suitable for large-scale screening of materials needed in electromagnetic launch systems due to their low precision and high cost. In this paper, a novel method for high-strain rate tensile testing of aluminum alloys based on magnetic pulse driving was proposed. The method can generate a fast-rising edge and adjustable stress pulses to enable uniaxial tensile deformation, reaching a target strain rate quickly and keeping it constant. Based on the theory of stress wave transmission, a single-point method for measuring stress–strain relationship of the specimen combining digital image correlation (DIC) technology is proposed. Finite element simulations using the explicit finite element software LS-DYNA demonstrate a good agreement between the strains and strain rate with experimental values. Tensile tests were conducted on AA7075 in the strain rate range of 1000–3000 s−1, the stress–strain relationship obtained from DIC agrees well with the results of traditional Hopkinson bar experiments.

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