DISCUSSION

Based on the experiment column and stability that have been done, data was

collected in order to determine the critical load and observation of the deflection shape of

column of four different configurations was done. The condition of the column was first, having

both ends pinned supported and both ends fixed supported. Next, is one pinned and one end

fixed supported while the last one was one end free and fixed supported column. The

calculation was done and final data were tabulated in table. The data calculated was being

compared with the theoretical value in order to see its percentage error by using this formula,

Percentage Error = Theoretical value  – Experiment

Theoretical value

From data calculated, the critical load for both ends pinned supported is 28N

while the theoretical value for this type of column is 30.394N and this shows that there are no

big differences between these two values. Their percentage error was 9.485%. The deflection

shape of this column was having a buckling occur onto it.

Next, the critical load for pinned and fixed supported is 14N while its theoretical

value was 9.97N respectively. Their percentage error was highly differ from what have been

predicted which is -40.42% and this show that the material, cross section and length could not

hold the compressive load that being given onto it. Buckling is occur to this column based on the

observation that have been made.

For the both fixed supported column, its critical load and theoretical value were

29N and 28.34N respectively. The value does not differ too much and it’s acceptable. The

percentage error for this column were too small which is -2.33% and also its deflection shape

was buckling and bend over from its supporter when it reached its reasonable length.

For column that have fixed and one free supporter, its critical load was 8N and its

theoretical value is 6.88N which indicate that the experiment data was not too highly differ from

theory value. The percentage error for this type of column was -16.28% which slightly higher

than it’s supposed too. This maybe because of error that occur during conducting the

experiment or reading taken was not accurate and does not follow the procedure given. The

deflection shape for this column is its bend over from the supporter and having a buckling curve.

Finally, the experiment conducted was successfully done and data collected was

being analyze carefully. The final results was accepted and the error that occur during

conducting this experiment have been handled thoroughly.