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1. Support conditions

1. Support conditions. Conditions: A foam with dimension of 5*5*50cm was used throughout the experiment, so that only different support conditions can be altered. A half a bottle of water was used as a load. Result:

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1. Support conditions

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  1. 1. Support conditions Conditions: A foam with dimension of 5*5*50cm was used throughout the experiment, so that only different support conditions can be altered. A half a bottle of water was used as a load. Result: It was observed that hinged support can bear less rotation force, and thus showed larger deflection due to buckling. Fixed supports were stronger and showed less deflection. Columns • Fixed supports on both ends are stronger against buckling. • The longer or thinner a column, the more buckling it will be subject to. • Columns with wider shape in the middle is stronger against buckling. 1) Fixed on both top and bottom 2) Fixed on bottom and hinged on top 3) Hinged on both bottom and top Deflection in model: 5cm Diagram Deflection in model: 6cm Diagram Deflection in model: 8cm Diagram

  2. 3. Shape of column 2. Length Conditions: A foam with thickness 2cm and length of 15cm was used throughout the experiment, so that only the shape column can be tested. A half a bottle of water was used as a load. Result: It was observed that they were shortened vertically by about 1cm if they were loaded. Therefore, it was pre-stressed to show the deflection horizontally. Depending on the shape, the point at which buckling occurs was different. The columns which had wider shape in the middle were stronger against buckling, while the one which had narrower shape in the middle was the weakest. Conditions: A foam with section dimension of 5*5cm was used throughout the experiment, so that only length of the column can be tested. A half a bottle of water was used as a load. Result: It was observed that the longer the column, the larger the deflection will be with a linear relationship. Deflection in models Deflection in models 1. Wider in the middle: deflected not in the middle, but at closer to the edges. 2. Narrower in the middle : deflected easily in the middle, where there was the largest force for buckling. 3. Triangular shape in the middle: same as the first type, stronger in the middle. Length: 30cm Deflection: 3cm Length: 40cm Deflection: 4cm Length: 50cm Deflection: 5cm

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