The Model Of Deforming Mode Tube Under Axial Loading

Abdul Wahab, Muhamad Syafiq (2017) The Model Of Deforming Mode Tube Under Axial Loading. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Thin-walled tube is one of the energy absorbing structure that has been used to dissipate energy and increase the efficiency of crashworthiness. During an accident occurred, thin-walled tube dissipates the kinetic energy and convert it into other form of energy. Therefore, this energy absorbing structure gives enough energy dissipation before hitting the human. This study examines the square aluminium tube and circular Polyvinyl chloride (PVC) tube subjected to quasi static loading by using universal compression machine or Instron machine. The deforming modes for both tubes is observed. The paper model is developed by using a thick paper to illustrate the deforming mode for square aluminium tube only. Tensile test is conducted for both tubes in order to obtain the mechanical properties of the tubes. There are three difference in length for each types of tubes has been tested under quasi static loading. The experimental results obtained from the testing have been compared with theoretical results that obtained from mathematical equations. From the comparison, a good agreement has been achieved between the theoretical and experimental results. The analysis of load-displacement curve includes peak load, energy absorption, mean load and plastic folding results. Plastic folding for PVC tube is greater than aluminium tube because of the ductility behaviour. As a result, the circular PVC and square aluminium tubes deformed in progressive diamond mode for all three difference length. A series of paper model is developed for various stage of the deformation process in order to illustrate the phenomenon of compression process of square aluminium tube occurred during testing. As a conclusion, the results obtained from this study such as the series of paper model for deforming mode of square tubes can be used as a new product of learning tools in order to increase the understanding about the phenomenon of compression test.

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