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Wang J.,Jiangnan University | Lu L.-X.,Jiangnan University | Lu L.-X.,China National Light Industry Package Quality Supervising and Testing Center
Gongcheng Lixue/Engineering Mechanics | Year: 2012

In-plane plateau stress is an important index to evaluate the in-plane yield strength of honeycomb paperboards, which is sensitive to relative humidity. The effects of thicknesses, core layers, and liners on the in-plane plateau stress of honeycomb paperboard were investigated by experiments. The in-plane bearing capacity is undertaken by both liners and core layers of honeycomb paperboards. The in-plane plateau stress model of honeycomb paperboard considering the effect of relative humidity was proposed based on the longitudinal yield strength of honeycomb paper under different humidity conditions, which was compared with the experimental data. The results show that the thickness and liner materials of honeycomb paperboard have great influence on the in-plane plateau stress, on which the core layers has little influence; The model can effectively reflects the influence of relative humidity conditions on the plateau stress of honeycomb paperboards. Source


Song S.,Jiangnan University | Chen A.-J.,Jiangnan University | Chen A.-J.,China National Light Industry Package Quality Supervising and Testing Center
Shock and Vibration | Year: 2015

In accordance with dropping shock dimensionless cubic nonlinear dynamic equation of suspension spring system, by variational iteration method, a first-order approximate solution of the system was obtained. The nondimensional peak of displacement, the nondimensional peak of acceleration, and the dropping shock extended period were compared with the results of the Runge-Kutta method, at which relative errors were less than 4%. The influence of suspension angle on peaks of response were discussed. It shows that the maximum response nondimensional acceleration decreases with decrease of the suspension angle under condition of the same nondimensional dropping shock velocity. Conditions for resonance were obtained by applying the variational iteration method, which should be avoided in the packaging design. The results provide reference for suspension spring system design. © 2015 Shuang Song and An-Jun Chen. Source


Lu L.-X.,Jiangnan University | Lu L.-X.,China National Light Industry Package Quality Supervising and Testing Center | Wang J.,Jiangnan University | Wang J.,China National Light Industry Package Quality Supervising and Testing Center
Advanced Science Letters | Year: 2012

The property of energy-absorption is quite different between in-plane and out-of plane of honeycomb paperboards. It is important to evaluate the in-plane energy absorption properties of honeycomb paperboards for optimizing the selection of packaging materials and structures. Based on the out-of-plane energy-absorption theory of metal cellular materials, a piecewise function model of in-plane energy-absorption was proposed. The in-plane energy absorption performance of honeycomb paperboards was studied under standard environmental condition. And then, the theoretical energy-absorption diagrams were modeled and compared with the experimental data, showing good agreement. The results show that the suggested model can accurately reflect the energy absorption performance of honeycomb paperboards. © 2012 American Scientific Publishers All rights reserved. Source


Lu L.-X.,Jiangnan University | Lu L.-X.,China National Light Industry Package Quality Supervising and Testing Center | Sun J.-J.,Qingdao University of Science and Technology | Wang J.,Jiangnan University | Wang J.,China National Light Industry Package Quality Supervising and Testing Center
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

The fatigue vibration test of a corrugated fiberboard was conducted. The influence of the cycle number of vibration and vibration acceleration on load capacity of the corrugated fiberboard was determined, compared with a non-vibrated corrugated fiberboard. The load capability of the corrugated fiberboard after fatigue vibration not only depended on circulation number of loading but also on vibration peak acceleration and frequency. The change of stress-strain and cushioning coefficient after the vibration test was studied with a dynamic compression test. According to the test result, the three-dimensional relations about dynamic cushioning coefficient-maximum stress-vibration cycle number and maximum acceleration-stress-vibration cycle number were developed. The influence of fatigue on properties of cushioning material should be considered in order to meet the anticipated packaging effect. Source


Wang J.,Jiangnan University | Lu L.-X.,Jiangnan University | Lu L.-X.,China National Light Industry Package Quality Supervising and Testing Center | Wang J.,China National Light Industry Package Quality Supervising and Testing Center
Zhongguo Zaozhi Xuebao/Transactions of China Pulp and Paper | Year: 2011

Plateau stress is an important index to evaluate the compression properties of honeycomb cardboard, which is vulnerable to the impact of environment humidity. The effect of relative humidity on the plateau stress was studied by testing the longitudinal yield strength of honeycomb paper under four typical relative humidity in this paper, the plateau stress model of honeycomb cardboard considering the effect of relative humidity was established by using the modified theory of plateau stress of hexagonal metal honeycomb, and the model was testified with the experimental data. The results showed that the model can accurately reflect the influence of relative humidity on the plateau stress of honeycomb cardboard. Source

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