Product: ABAQUS/Standard
These tests verify the performance of the *STEP, EXTRAPOLATION option for structural and continuum elements used in models subjected to an in-plane rotation of 45°. For elements that do not have rotation degrees of freedom, beam elements are used to connect the elements to the point of rotation. The restart test verifies that the solution history information required for the extrapolation algorithm is transferred correctly to a restarted analysis.
In all cases the results indicate that this option performs as expected. When parabolic extrapolation is used, there is a speedup in computational time compared to linear extrapolation. The restart analysis results are identical to those for the original analysis from which the restart was run.
Beam (B31) elements with EXTRAPOLATION=PARABOLIC.
Continuum (CPS4) and beam (B31) elements with EXTRAPOLATION=LINEAR.
Membrane (M3D4) and beam (B31) elements with EXTRAPOLATION=PARABOLIC.
Shell (S4R) element with EXTRAPOLATION=PARABOLIC.
Restart of xsteshel.inp without the END STEP parameter on *RESTART.
Truss (T2D2) and beam (B21) elements with EXTRAPOLATION=PARABOLIC.