Buchalik Ryszard, Nowak Grzegorz
Department of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland.
Materials (Basel). 2021 Feb 25;14(5):1072. doi: 10.3390/ma14051072.
This paper considers issues related to the assessment of the mechanical properties of elements made with 3D printing technology. To enable experimental testing, an automated test stand was built to perform amplitude and phase angle measurements of any point of the specimen. A contactless, optical measurement method was selected, as it is especially adequate when it comes to elements with small dimensions and masses. One innovative element of the test stand is the original method of phase angle measurement using a single vibration sensor fitted with a system forcing and ensuring full measurement synchronization and dynamic state repeatability. Additionally, numerical models of tested objects were produced and simulations of their oscillations were performed. Based on that, the properties of the tested material (PLA) were considered, with a special focus on the density, elastic modulus, and damping. The analyses were conducted for a few elements with different dimensions at different vibration frequencies.
本文考虑了与3D打印技术制造的元件力学性能评估相关的问题。为了进行实验测试，搭建了一个自动化测试台，用于对试样的任意点进行振幅和相位角测量。选择了一种非接触式光学测量方法，因为对于尺寸小、质量轻的元件来说，这种方法特别适用。测试台的一个创新点是使用单个振动传感器进行相位角测量的原始方法，该传感器配备了系统激励装置，可确保完全测量同步和动态状态可重复性。此外，还建立了测试对象的数值模型并对其振荡进行了模拟。在此基础上，研究了测试材料（聚乳酸）的性能，特别关注密度、弹性模量和阻尼。针对不同振动频率下的几种不同尺寸的元件进行了分析。
