Consideration of Eccentricity Effect on Air Cushion Bag Packaging System Using Experiment and Numerical Simulation
Date Issued
2009
Date
2009
Author(s)
Hsu, Yi-Fan
Abstract
The products are bearing a lot of risks during transportation of logistaics. For example drop, compression etc., in order to keep product’s quality packaging system can reduce the impact force during the logistics. In general, we consider products as balanced-weight objects while we predict drop test results. But most of products are unbalanced-weight objects. Therefore, the drop test of air cushion bag packaging system in this research takes unbalanced-weight effect, namely eccentricity effect, and energy loss into account when using numerical simulation methods to predict the results.he purpose of this research is to understand air cushion bag’s behavior during dropping by numerical simulation methods. Most literature on relevant research of packaging system neglect eccentricity effect to simplify analysis. But in this research it is saying that eccentricity effect has influence on maximum acceleration received from accelerometer. So this research generalizes experiment’s results to coordinate the relationship between eccentricity and energy loss first. Second, use energy method, two (three) degree of freedoms of nonlinear spring system and LS-DYNA FEM software to predict the results of drop test.n addition, to verify that air cushion bag has strain rate effect, this research makes use of high speed camera cooperated with accelerometer through drop test, and high speed impulse test. On the other hand, as to real products, this research measures actual position of center of mass by three platform scales and calculates its eccentricity first. Then predict the results by numerical simulation methods and compare with experiment’s results.
Subjects
air bag
cushion package
energy loss
eccentricity
eccentric drop test
high speed impulse test
SDGs
Type
thesis
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