Research on Non-linear Equivalent Elastic Modulus of Negative Poisson's Ratio Honeycomb Core-layer

Abstract

Abstract:

A negative Poisson's ratio honeycomb structure was designed and fabricated herein, a flexible cantilever model was used to analyze the bending deformation of the honeycomb panel under the situation of large deformation, then deduced a theoretical formula used to calculate the equivalent elastic modulus. Through the experimental comparison of finite element simulation and mechanical analysis, the paper verified the correctness of the non-linear theory formula, obtained nonlinear characteristics of the equivalent elastic modulus and the variation characteristic of the modulus of elasticity of the same direction and in different directions.It provides reference for flexible honeycomb core-layer structure of the engineering practices.

Key words: honeycomb core-layer, negative Poisson ratio, non-linearity, equivalent elastic modulus

摘要：

设计并加工了一种负泊松比蜂窝结构,采用柔性悬臂梁模型,对蜂窝壁板大变形条件下的弯曲变形进行分析,给出了蜂窝芯面内等效弹性模量理论计算公式。通过有限元仿真和力学实验的对比分析,验证了非线性理论计算公式的正确性。得出了等效弹性模量的非线性特性及相同方向和不同方向弹性模量的变化特性。研究结果为柔性蜂窝芯层的工程实用化提供了参考。

关键词: 蜂窝芯, 负泊松比, 非线性, 等效弹性模量

CLC Number:

TB383

Lu Chao, Li Yongxin, Wu Jinxi, Liu Ming, Li Tianqi. Research on Non-linear Equivalent Elastic Modulus of Negative Poisson's Ratio Honeycomb Core-layer[J]. China Mechanical Engineering, 2014, 25(11): 1540-1544.

鲁超, 李永新, 吴金玺, 刘明, 李天齐. 负泊松比蜂窝芯非线性等效弹性模量研究[J]. 中国机械工程, 2014, 25(11): 1540-1544.

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