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The Creep Properties of Timothy when Compressed to High Density

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008623.(doi:10.13031/2013.29673)
Authors:   Guanghui Wang, Decheng Wang, Lope G Tabil, Anthony Opoku
Keywords:   Compression, creep, elastic property, viscous property, timothy hay

Fibrous biomaterials can be utilized for different applications. Compression processing is a highly efficient way to reduce the transportation cost. Most biomaterials including agricultural fibrous materials exhibit viscoelastically when subjected to stress and strain. In this paper, the creep properties of timothy bales were investigate, when subjected to high pressure compression. To determine if material collapse during compression (failure?) has an effect on hay properties, tests were designed so that materials were tested in two lengths: original length and length less than 125 mm (5 in.). Moisture content was used as one of the experimental factors as well. It was found that cut hays creep properties were different from the original hay. The elastic and viscous coefficients for cut hay were lower than original hay in the same moisture level. Moisture also affected the elastic and viscous coefficients. Higher moisture lead to higher viscous coefficients but an opposite trend was observed on the elastic coefficient. Data from this investigation can be used by, researchers and equipment designers in designing a high performance compactor to increase the efficiency of industrial production.

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