Rozylo Patryk, Rogala Michal, Pasnik Jakub
Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Materials (Basel). 2024 Apr 1;17(7):1615. doi: 10.3390/ma17071615.
The aim of the current study was to determine the load capacity of composite columns subjected to axial compressive load. The subjects of the study were two types of columns with a rectangular cross-section, with different edge lengths. The tested columns had a closed cross-section. Four different fiber arrangements were analyzed for both cross-sections studied. The research was realized using interdisciplinary methods to determine the mechanism of damage to the composite material, with particular emphasis on damage initiation and propagation. Experimental tests were realized on a testing machine, the analysis was carried out with an acoustic emission system, and image analysis using visual assessment system of deflections of the walls of the structure. In addition, a number of numerical analyses were realized based on advanced modeling techniques for fiber-reinforced composites. A comparative analysis of both quantitative and qualitative results is presented for both analyses. The innovation of the presented research lies in the development of a custom method for modeling structures made of composite material with special emphasis on the failure phase. This will allow to accurately reflect the modeling of thin-walled structures with closed cross-section subjected to loading in a complex stress state.
本研究的目的是确定承受轴向压缩载荷的复合材料柱的承载能力。研究对象是两种具有不同边长的矩形横截面柱。测试柱具有封闭横截面。对所研究的两种横截面都分析了四种不同的纤维排列方式。该研究采用跨学科方法来确定复合材料的损伤机制，特别强调损伤的起始和扩展。在试验机上进行了实验测试，使用声发射系统进行分析，并通过结构壁面挠度视觉评估系统进行图像分析。此外，基于先进的纤维增强复合材料建模技术进行了一些数值分析。对两种分析的定量和定性结果都进行了对比分析。所提出研究的创新之处在于开发了一种定制方法，用于对由复合材料制成的结构进行建模，特别强调失效阶段。这将能够准确反映承受复杂应力状态载荷的具有封闭横截面的薄壁结构的建模。
