新型零泊松比类蜂窝结构面内非线性刚度研究
Study on the In-plane Nonlinear Stiffness of a Novel Zero Poisson's Ratio Quasi-honeycomb Structure
廖学知 1王洪波 2李宝玉 1赵晓宁1
作者信息
- 1. 中国运载火箭技术研究院, 北京, 100076
- 2. 中国航天科技集团有限公司, 北京, 100048
- 折叠
摘要
几何非线性刚度研究对变形飞行器结构大变形的应用具有重要意义.为研究具有正弦波纹壁的零泊松比类蜂窝结构面内大变形时的非线性力学行为,基于非线性梁理论,考虑几何非线性建立了大变形下的非线性力学模型.利用有限元仿真验证了理论分析方法的正确性,通过参数分析讨论了几何参数对等效应力-应变曲线的影响.结果表明,随着应变的增加,结构的几何非线性造成结构的等效拉伸刚度增大;应力-应变曲线受波纹度、蜂窝角、厚度比的影响较大,受高度比影响不明显.
Abstract
The geometrically non-linear stiffness response of morphing aircraft structures is crucial for applications with large deformations.In order to study the nonlinear mechanical behavior of zero Poisson's ratio honeycomb structure with sinusoidal corrugated walls during large deformation in plane,a nonlinear mechanic model with consideration for geometric nonlinear is established based on nonlinear beam theory.It is verified by comparison with non-linear structural analysis with FEM.The stress-strain relationships with different parameters are obtained.The results show that the geometric nonlinear increases the equivalent stiffness with the increase in strain,and the stress-strain curves are greatly affected by corrugation ratio,thickness ratio,and inclination angle,but not by height ratio.
关键词
蜂窝结构/波纹结构/几何非线性/力学性能/零泊松比Key words
honeycomb structure/corrugated structure/geometric nonlinearity/mechanical characteristic/zero Poisson's ratio引用本文复制引用
基金项目
国家自然科学基金联合基金(U20B200071)
出版年
2024
NETL
NSTL
万方数据