The Solid Wood Filled Tube Under Axial Loading

Teo, Kah Chun (2017) The Solid Wood Filled Tube Under Axial Loading. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Efficient energy absorbers are widely made from thin-walled structures such as aluminium because of the good energy absorption capacity. In this paper, the behavior of hollow tubes and wood-filled tubes that subjected to axial loading in quasi-static test is studied. Agarwood which known as “Gaharu” would be the wood that been used in this study. To this aim, quasi-static axial loading test have been performed on square and circular aluminium tube. Experimental work showed the effect of solid wood for the energy absorption capacity of tubes. The mode of deformation for the circular tube and square tube is investigated. Results from the quasi-static test are presented on tubes of various length which consisted of 50mm, 100mm, 150mm and 200mm. Theoretical models of axial collapse modes for circular tube and square tube has been developed and established a comparison between theoretical results and experimental results. The results obtained for the mean load and plastic wavelength agreed reasonably with the experimental observations. Satisfactory agreement were generally achieved between theoretical value and experimental value of mean load and plastic wavelength. In this paper, it also highlighted the comparison of square tube and circular tube in terms of energy absorption and specific energy absorption. The energy absorption in wood-filled tube is shown to be higher than the hollow tube whereas the specific energy absorption in hollow tube is shown to be higher than wood-filled tube. Some observations are made on the influence of geometrical imperfection and the methods to reduce the deviation of theoretical value and experimental value.

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