Kovács György
Faculty of Mechanical Engineering and Informatics, Institute of Manufacturing Science, University of Miskolc, Egyetemváros, H-3515 Miskolc, Hungary.
Polymers (Basel). 2021 Dec 12;13(24):4348. doi: 10.3390/polym13244348.
Nowadays, the application of composite materials and light-weight structures is required in those industrial applications where the primary design aims are weight saving, high stiffness, corrosion resistance and vibration damping. The first goal of the study was to construct a new light-weight structure that utilizes the advantageous characteristics of Carbon Fiber Reinforced Plastic (CFRP) and Aluminum (Al) materials; furthermore, the properties of sandwich structures and cellular plates. Thus, the newly constructed structure has CFRP face sheets and Al stiffeners, which was manufactured in order to take experimental measurements. The second aim of the research was the elaboration of calculation methods for the middle deflection of the investigated sandwich-like structure and the stresses that occurred in the structural elements. The calculation methods were elaborated; furthermore, validated by experimental measurements and Finite Element analysis. The third main goal was the elaboration of a mass and cost optimization method for the investigated structure applying the Flexible Tolerance optimization method. During the optimization, seven design constraints were considered: total deflection; buckling of face sheets; web buckling in stiffeners; stress in face sheets; stress in stiffeners; eigenfrequency of the structure and constraints for the design variables. The main added values of the research are the elaboration of the calculation methods relating to the middle deflection and the occurred stresses; furthermore, elaboration of the optimization method. The primary aim of the optimization was the construction of the most light-weighted structure because the new light-weight sandwich-like structure can be utilized in many industrial applications, e.g., elements of vehicles (ship floors, airplane base-plate); transport containers; building constructions (building floors, bridge decks).
如今，在那些主要设计目标为减轻重量、提高刚度、耐腐蚀和减振的工业应用中，需要应用复合材料和轻质结构。该研究的首要目标是构建一种利用碳纤维增强塑料（CFRP）和铝（Al）材料优势特性的新型轻质结构；此外，还有夹层结构和蜂窝板的特性。因此，新构建的结构有CFRP面板和Al加强筋，其制造目的是进行实验测量。该研究的第二个目标是阐述所研究的类夹层结构的中间挠度以及结构元件中出现的应力的计算方法。这些计算方法已详细阐述；此外，还通过实验测量和有限元分析进行了验证。第三个主要目标是应用灵活公差优化方法，为所研究的结构阐述一种质量和成本优化方法。在优化过程中，考虑了七个设计约束条件：总挠度；面板屈曲；加强筋中的腹板屈曲；面板中的应力；加强筋中的应力；结构的固有频率以及设计变量的约束条件。该研究的主要附加值在于阐述了与中间挠度和出现的应力相关的计算方法；此外，还阐述了优化方法。优化的首要目标是构建重量最轻的结构，因为这种新型轻质类夹层结构可用于许多工业应用，例如车辆部件（船甲板、飞机底板）；运输集装箱；建筑结构（建筑楼层、桥面板）。
