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Load tracking with the arc-length method

Load tracking with the arc-length method

Load tracking with the arc-length method

(OP)
Hi all,

How can I track the value of the load at each substep when using the arc-length method to solve a non-linear buckling problem? With the N-R method, the time is used to track the value of the load at a given substep but in the arc-length method, the time is not monotonic increasing ie. doesn't reflect the value of the load at the current substep.

The scope is to plot a load vs deflection curve.

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