柔性铰可变形蜂窝结构的面内拉伸性能  

In-plane tensile property of deformable honeycomb structure with compliant hinge

作　　者：赵畅 周丽[1] 邱涛[1] ZHAO Chang;ZHOU Li;QIU Tao(State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016

出　　处：《复合材料学报》2024年第12期6802-6810,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52075243)。

摘　　要：提出了一种柔性铰可变形蜂窝结构,该结构由十字形蜂窝和内置式平面折展扭转柔性半铰(Half inside lamina emergent torsional joint,内LET半铰)组成,通过降低结构面内刚度提升变形能力,具有质量轻、面内模量低的特点。通过理论分析研究了柔性铰可变形蜂窝结构的面内等效弹性模量,并进行了仿真和实验验证,分析了几何参数对结构等效弹性模量的影响,最后通过仿真和实验比较了柔性铰可变形蜂窝与十字形蜂窝的面内刚度。结果表明:柔性铰可变形蜂窝的等效弹性模量与十字形蜂窝相比降低了80%以上,具有更优秀的面内变形能力,将可变形蜂窝结构与柔性铰链巧妙结合是一种提升蜂窝结构面内变形能力的有效方式。A deformable honeycomb structure with compliant hinge which is composed of the cross-shaped honeycomb and the half inside lamina emergent torsional joint was proposed.By reducing the in-plane stiffness,the deformation ability of the structure is improved,and it has the characteristics of light weight and low in-plane modulus.The in-plane equivalent elastic modulus of the deformable honeycomb structure was studied by theoretical analysis,and simulation and experimental verification were carried out.The influence of geometric parameters on the equivalent elastic modulus of the structure was also analyzed.The in-plane deformation ability of the deformable honeycomb with compliant hinge and the cross-shaped honeycomb was compared through simulation and experiment.The results show that the deformable honeycomb structure with compliant hinge has better in-plane deformable ability.Compared with cross-shaped honeycomb,the equivalent elastic modulus of deformable honeycomb with compliant hinge is reduced by more than 80%.Thus,the combination of compliant hinge and deformable honeycomb structure is an effective way to improve the in-plane deformation ability of honeycomb structure.

关 键 词：蜂窝夹层结构 弹性模量 理论分析 有限元仿真 内LET半铰 

分 类 号：O342[理学—固体力学] V214.6[理学—力学] TB330.1[航空宇航科学与技术—航空宇航推进理论与工程]