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

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

“…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.…”

“…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 ].…”

“…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 ].…”