Korzeniewska Ewa, De Mey Gilbert, Pawlak Ryszard, Stempień Zbigniew
Institute of Electrical Engineering Systems, Lodz University of Technology, ul. Stefanowskiego, 90-924, Lodz, Poland.
Department of Electronics and Information Systems Ghent University, Technologiepark Zwijnaarde 126, 9052, Zwijnaarde, Belgium.
Sci Rep. 2020 May 20;10(1):8310. doi: 10.1038/s41598-020-65316-2.
In the article a description of the behaviour of metallic layers created in the process of physical vacuum deposition on a composite textile substrates during their cyclical bending process is presented. Either the results of experimental research or the theoretical considerations of changes in the structure resistance as a function of the number of fatigue cycles are presented. It was confirmed mathematically that at the beginning of the bending process, in the case of a small number of bends, single cracks appear on the surface of the layer. After exceeding a certain number of bends, the nature of defects on the surface of the layer changes and the dominating mechanism of changes is the widening and elongation of already existing cracks. It has been confirmed mathematically that changes in resistance in these cases depend respectively on the number of bending cycles and next on quadratic value of number of cycles. A correspondence between the mathematical description and experimental results was obtained.
本文描述了在复合纺织基材上进行物理真空沉积过程中形成的金属层在其循环弯曲过程中的行为。文中给出了实验研究结果以及结构电阻随疲劳循环次数变化的理论考量。从数学上证实，在弯曲过程开始时，弯曲次数较少的情况下，层表面会出现单个裂纹。超过一定弯曲次数后，层表面缺陷的性质发生变化，变化的主导机制是已有裂纹的扩展和延伸。从数学上证实，在这些情况下电阻的变化分别取决于弯曲循环次数，进而取决于循环次数的平方值。获得了数学描述与实验结果之间的对应关系。
