Falkowicz Katarzyna, Wysmulski Pawel, Debski Hubert
Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Materials (Basel). 2023 Jul 11;16(14):4948. doi: 10.3390/ma16144948.
This study investigated thin-walled plate elements with a central cut-out under axial compression. The plates were manufactured from epoxy/carbon laminate (CFRP) with an asymmetric layup. The study involved analyzing the buckling and post-buckling behavior of the plates using experimental and numerical methods. The experiments provided the post-buckling equilibrium paths (), which were then used to determine the critical load using the straight-line intersection method. Along with the experiments, a numerical analysis was conducted using the Finite Element Method (FEM) and using the ABAQUS software. A linear analysis of an eigenvalue problem was conducted, the results of which led to the determination of the critical loads for the developed numerical model. The second part of the calculations involved conducting a non-linear analysis of a plate with an initial geometric imperfection corresponding to structural buckling. The numerical results were validated by the experimental findings, which showed that the numerical model of the structure was correct.
本研究对带有中心切口的薄壁板单元在轴向压缩下的情况进行了调查。这些板材由具有不对称铺层的环氧/碳纤维层压板(CFRP)制成。该研究涉及使用实验和数值方法分析板材的屈曲和后屈曲行为。实验提供了后屈曲平衡路径,然后使用直线相交法来确定临界载荷。除了实验之外,还使用有限元方法(FEM)并借助ABAQUS软件进行了数值分析。对特征值问题进行了线性分析,其结果导致确定了所开发数值模型的临界载荷。计算的第二部分涉及对具有对应于结构屈曲的初始几何缺陷的板材进行非线性分析。数值结果通过实验结果得到了验证,这表明该结构的数值模型是正确的。