Hartwich Jonasz, Duda Sławomir, Sławski Sebastian, Kciuk Marek, Woźniak Anna, Gembalczyk Grzegorz
Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland.
Department of Mechatronics, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland.
Materials (Basel). 2024 Sep 18;17(18):4577. doi: 10.3390/ma17184577.
This paper presents the results of an experimental study designed to evaluate the effect of repeated stretching cycles on the electrical resistance change in a NiTi alloy wire. In particular, tests were carried out to determine the effect of the type of loading on resistance change in the investigated wires. Wires with a diameter of 100 μm were used in the research. The experiment was carried out on a dedicated test stand designed for this purpose. During the test, the samples were subjected to 40 identical tensile cycles. The electrical resistance, sample elongation, and tensile force during successive stretching cycles were measured. The conducted research demonstrated the impact of elongation and reorientation of the structure on the resistance change in NiTi alloy thin wires. The research included a comparison of the effect of two different types of loading on the electrical resistance change in the sample. During cyclic stretching of a NiTi alloy sample with constant displacement, a decrease in electrical resistance was observed after each successive stretching cycle. Alternatively, when stretching with a constant force, the value of electrical resistance increased. In both types of loads, the greatest change in resistance value was observed at the initial cycles.
本文介绍了一项实验研究的结果，该研究旨在评估重复拉伸循环对镍钛合金丝电阻变化的影响。具体而言，进行了测试以确定加载类型对所研究金属丝电阻变化的影响。研究中使用了直径为100μm的金属丝。实验在为此专门设计的测试台上进行。在测试过程中，样品经历了40个相同的拉伸循环。测量了连续拉伸循环过程中的电阻、样品伸长量和拉力。所进行的研究证明了结构的伸长和重新取向对镍钛合金细丝电阻变化的影响。该研究比较了两种不同类型的加载对样品电阻变化的影响。在镍钛合金样品以恒定位移进行循环拉伸时，在每次连续拉伸循环后观察到电阻降低。或者，当以恒定力拉伸时，电阻值增加。在两种类型的载荷中，在初始循环中观察到电阻值的最大变化。
