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http://dx.doi.org/10.7234/kscm.2012.25.1.019

Buckling Behavior of Sandwich Composite Columns by Varying Hole Size and Hole Position  

Lee, Sang-Jin (한국신발피혁연구소 신발연구부)
Yoon, Sung-Ho (금오공과대학교 기계공학과)
Publication Information
Composites Research / v.25, no.1, 2012 , pp. 19-25 More about this Journal
Abstract
The study investigated the buckling behavior of sandwich composite columns with different hole sizes and hole positions when they were applied to a compressive load. The columns consisted of 1.7mm thick faces of glass fabric/epoxy and 23mm, 37mm, 48mm, and 61mm thick cores of urethane-foam. Different hole sizes with the diameter of 25mm and 38mm were considered in this experiment. To evaluate the effect of hole position on the buckling behavior, we considered three types of hole position: 25mm diameter hole located at the center, 25mm diameter hole at 1/4 position from the center to the end of the column, and 25mm diameter hole at 1/2 position from the center to the end of the column. According to the results, buckling and maximum loads of the column having 25mm diameter hole were lower by 10% compared to those of the column without hole, whereas the loads for the column having 38mm diameter hole were 30% less than those of the column without hole. Hole position appeared to have no effect on buckling and maximum loads. Major failure modes were observed as follows: the core shear failure for the thin columns having 23mm and 37mm thick cores, and the face-core debonding for the thick columns having 48mm and 61mm thick cores.
Keywords
buckling behavior; sandwich composite column; failure mode; core shear failure; face-core debonding;
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