Impact Experiment and Numerical Analysisof Aluminum Tube

• Main Authors: Yu-An Po, 薄有安
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/42632927376051601824

碩士 === 國立高雄第一科技大學 === 營建工程所 === 95 === As a structural member, hollow aluminum tube has advantages both in self-weight and strength. When the tube is subjected to transverse impact load, resulting flexural and shear deformations often lead to material yielding and local buckling. Herein, the dynamic response of the tube is investigated through numerical and experimental procedures. A series of impact experiments are conducted on 6063T5 aluminum tube members of various sections and lengths, undertaking different levels of impact energy. Using static method as in rolled steel design, the local buckling and non-linear deformation pattern of the tube sections can be estimated first. Finite element dynamic analyses are then used to simulate the tube’s non-linear response to impact load. The local buckling and failure modes as predicted by static method and finite element method can be identified mostly in the experiments. The width-thickness ratios of the tube section dictate the occurrence of local buckling, as in static case. The deviation of analyzed results appears to derive from the strain-rate dependency of the yield stress during the impact. For those cases of hollow tubes with significant damages, additional simulation and testing works conducted on mortar-filled tubes indicate that local buckling and plastic deformations induced by impact load can be greatly reduced.