| The purpose of this study was to investigate the effects of temperature on the vibration transmission properties of three of the most commonly used cushion materials to protect fragile products during distribution. It is a continuation of a previous research project where the effect of temperature on the shock absorption properties of the same materials was investigated.; The materials used in this study were expanded polyurethane (EPU), expanded polyethylene (EPE), and expanded polystyrene (EPS) foams. The temperature effects were investigated by testing cushion blocks that had been conditioned at four different temperatures. The tests measured how vibration is transmitted from transport vehicles, through these materials, to the products they cushion. The results showed that the vibration transmission properties of EPU and EPE foams varied more with temperature than EPS foam. This indicates that a cushioned package system that attenuates vibration at one temperature may amplify vibration when the temperature changes. |
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