一种新型组合蜂窝结构的轴向承载性能研究

RESEARCH ON AXIAL LOAD CARRYING CAPACITY OF A NEW TYPE OF SUPERCELL HONEYCOMB STRUCTURE

轴向承载力是蜂窝结构重要的力学性能指标。提出一种基本胞元由菱形和圆形构成的新型组合蜂窝结构,围绕其轴向结构稳定性、整体刚度和强度三个方面展开研究。首先运用线性特征值屈曲分析方法,通过有限元数值模拟,实现了新型组合蜂窝的结构稳定性分析过程,并与菱形、正六边形、正八边形蜂窝结构的屈曲分析结果进行了比较;同时,以某型号电动车底盘中部甲板为例,验证了新型组合蜂窝夹芯结构在轴向载荷作用下的整体强度和刚度,并分析了不同胞元壁厚对夹芯整体强度和刚度的影响。结果表明,新型组合蜂窝具有良好的轴向结构稳定性,且其夹芯层整体刚性和强度较好,轴向承载力强,是综合力学性能较优的创新构型。

Axial load carrying capacity is one of the most important mechanical property indexes of honeycomb structure. A new type of supercell honeycomb structure was put forward in which rhombus and circle were combined into the basic cell,and research was focused on its structural stability,overall strength and stiffness. By helps of finite element numerical simulation,the method of eigenvalue buckling analysis was used to realize the process of structural stability analysis of the supercell honeycomb,and the analysis result was also compared with those of rhombus,regular hexagon and regular octagon honeycomb structure.Meanwhile,a type of chassis deck of electrical motorcycle was taken as an example to testify the overall strength and stiffness of the new type of honeycomb sandwich structure＇s core under axial load and analyze the influence on strength and stiffness of the core with different wall thickness of its cell. The results show that the new type of supercell honeycomb is an innovative configuration with good comprehensive mechanical properties such as better axial structural stability,high strength and overall stiffness of honeycomb sandwich structure＇s core,and axial load-bearing capacity.