The Saw Dust Filled Tube Under Axial Loading

Ong, Xiong Hui (2017) The Saw Dust Filled Tube Under Axial Loading. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Impact energy absorption device is one of the essential structural components used in safety application. It performs its services by reducing and absorbing the excessive kinetic energy to protect users from injury. Due to this safety purpose, impact energy absorption device is explored. Occasionally, metallic tubes are mostly used as the impact energy absorbing elements. Aluminium tube, as one type of the metallic tube is investigated and analyzed in this project. A development idea is laid out by introducing saw dust as filled material into the impact energy absorption device. This project was carried out to study the effect of saw dust on the collapse behavior and energy absorption performance to enhance the energy absorption device. Three different types of aluminium tubes were used, one circular and two different sizes of square aluminium tubes are filled with saw dust at different density and compressed axially by quasi-static loading. This project started with reviewing the previous researches to understand the theories and information which related to the present study. It was found that the material properties, mechanical properties and size of the tube greatly affect the deformation behavior and energy absorption performance. Following with this, tensile test and axial compression test experiments have been conducted in this project. Tensile test was carried out to investigate and determine the mechanical properties of aluminium tube. From the tensile test result obtained, the mechanical properties were later used to evaluate the theoretical mean load. While axial compression experiment involved the density setup for tube filled with saw dust and the observation of tube deformation pattern. Both hollow and saw dust filled aluminium tubes were compressed by INSTRON testing machine to obtain the load displacement characteristics. From load displacement curve, the densification point, plastic wavelength, mean load, energy absorption, and specific energy were determined and analyzed. Theoretical calculation for mean load, plastic wavelength and energy absorbed were also evaluated as well and compared with the experimental result. Both results show that the presence of saw dust affects the mean crushing load and energy absorption.

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