| Instructions |
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For calculation of the main characteristics of the structure, user has to enter
the following data: the radius R of the shell, the length of the shell L,
its thickness h of the same units, Poisson's ratio ν, type of loading and number of post-buckling dimples.
The format of input data and restrictions of the model will be validated.
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The last 3 constrains are related to number of buckles n corresponding to different cases of loading types. The result is provided as a Table of values of energy barrier En, maximum force Qmax, deflection for the interval of the axial load parameter N [0.3, 0.7]. Data are normalized according to General information. Deflection amplitude w is normalized with respect to shell thickness h. The graph of energy barrier depending on N is also depicted. Value of knockdown factor (KDF) for lower local buckling load N- with corresponding energy barrier, delection amplitude, and buckling value of probing force Qmax is calculated. If kn>=3 and Z>=400 the value of knockdown factor (KDF) for upper local buckling load N+ with corresponding energy barrier, delection amplitude, and buckling value of probing force Qmax is calculated as well. |