多级加筋面板受力行为分析及优化  

Analysis and Optimization of Mechanical Behavior of Multi⁃Level Reinforced Panels

作　　者：严嘉伟 邓庆田[1] 李新波[1] 温金鹏[2] YAN Jiawei;DENG Qingtian;LI Xinbo;WEN Jinpeng(School of Science,Chang'an University,Xi'an 710064,Shaanxi,China;Institute of Systems Engineering,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]长安大学理学院,陕西西安710064 [2]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《力学季刊》2024年第2期387-400,共14页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(52078419);国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(U1930204)。

摘　　要：采用三点弯曲实验和有限元仿真方法,对多级加筋面板的变形和破坏进行分析.引入正六边形和内凹六边形两种加筋模式,将具有不同横纵向加筋肋壁厚、圆弧倒角优化的直角边界及二级加筋结构的加筋面板作为研究对象,分析在给定加筋面板几何参数的情况下,横纵向加筋肋壁厚、圆弧倒角优化处理、二级加筋结构对加筋面板结构强度和力学行为的影响.研究表明,加筋面板结构强度随着横纵向加筋肋壁厚的增加而增加,纵向加筋肋壁厚对加筋面板结构影响较大;内凹六边形加筋模式较正六边形加筋模式的加筋面板承载力高;圆弧倒角优化后可以明显改善边角处的应力集中现象、提升加筋面板的结构强度;二级加筋面板的承载能力得到明显提升,且次级加筋层胞元为内凹六边形时提升效果最明显.Three-point bending experiments and finite element simulation methods are used to analyze the deformation and damage of multi-level reinforced panels.Two reinforcing patterns are introduced:ortho-hexagonal and concave-hexagonal.The research objects include the reinforced panels with different transverse and longitudinal reinforcing rib wall thicknesses,the right-angle boundaries optimized with rounded chamfers,and the secondary reinforcement structures.To analyze the effects of transverse and longitudinal reinforcing rib wall thickness,optimized rounded chamfer,and secondary reinforcement structure on the structural strength and mechanical behavior of the reinforced panels with given geometric parameters.The results indicate that the structural strength of the reinforced panel increases with the increase of transverse and longitudinal reinforcing rib wall thickness,and the longitudinal reinforcing rib wall thickness has a greater impact on the structural strength.The concave hexagonal reinforcement pattern has a higher load bearing capacity than the orthogonal hexagonal reinforcement pattern.Introducing the optimized rounded chamfer can significantly mitigate the stress concentration at the edges and corners,leading to enhancement of the structural strength of the reinforced panel.The load carrying capacity of the secondary reinforced panels is significantly improved,and the improvement is most pronounced when the secondary reinforcement incorporates concave hexagonal cells.

关 键 词：多级加筋面板 横纵向加筋肋壁厚 承载能力 圆弧倒角优化 

分 类 号：O347[理学—固体力学]