摘要
环境湿度和几何参数对蜂窝纸板的力学性能具有重要影响。应用试验方法和有限元技术研究和分析蜂窝纸板的动态冲击压缩过程,研究不同湿度下不同厚跨比的蜂窝纸板的冲击承载能力和能量吸收能力。单层瓦楞原纸和双层蜂窝胞壁的弹性模量和屈服强度均随湿度的增加呈指数下降,纸管胶粘合后的双层蜂窝胞壁的弹性模量和屈服强度明显高于单层瓦楞原纸。试验和有限元分析均显示蜂窝纸板冲击压缩过程与金属蜂窝板冲击压溃过程类似,是一个从顶部到底部的渐进规律叠缩压溃过程。当环境湿度增加和厚跨比减少时,蜂窝纸板冲击压缩时的初始峰值应力、平台应力和吸能性能均明显下降。给出的不同环境湿度下不同厚跨比的蜂窝纸板冲击压缩能量吸收曲线对产品缓冲包装设计有重要的参考价值。
Environment humidity and geometrical parameter have the important effect on the mechanical characteristics of honeycomb paperboards. The impact compression of honeycomb paperboards is investigated by using the experiment and finite element method, and the impact load carrying capacity and energy absorption ability are obtained for honeycomb paperboards with different thickness-to-length ratios under different humidity. The elastic modulus and yield strengths of the corrugated medium and double honeycomb cell wall are exponentially decreased with the increasing of the relative humidity, and the elastic modulus and yield strength of the double honeycomb cell wall are obviously large than those of the corrugated medium. The deformation of paper honeycombs under the dynamic impact is similar to that of metal honeycombs and exhibits strong localization, that is, the loading end of the paper honeycomb is crushed at first, then the deformation band grows and spreads to the rest of the specimen and the paper honeycomb cell walls fold progressively. The initial peak stress, plateau stress and energy absorption of honeycomb paperboards are decreased remarkably with the increasing of the relative humidity and the decreasing of the thickness-to-length ratio. The energy absorption curves obtained for honeycomb paperboards with different thickness-to-length ratios under different humidity are very valuable to the design of cushion packaging of products.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2012年第12期49-55,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50775100)
暨南大学创新基金资助项目
关键词
蜂窝结构
纸板
冲击试验
有限元法
能量吸收
相对湿度
Honeycomb structures Paperboards Impact testing Finite element method Energy absorption Relative humidity
