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ST7-R3.20.10.4 Determining the Onset of Buckling in a Nonlinear Static Analysis
Nonlinear buckling analysis involves not only identification of the point at which buckling (structural instability) may be regarded as having occurred, but also the structural behaviour leading up to the instability, and often the structural behaviour beyond the instability. In contrast to linear buckling analysis, the result is not output explicitly as a buckling load factor. Instead, the structural response needs to be interpreted, typically by inspecting a graph of applied load vs displacement or other quantity.
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