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If a quasi-static analysis is performed in its natural time scale, the
solution should be nearly the same as a truly static solution.
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It is often necessary to use load rate scaling or mass scaling to obtain
a quasi-static solution using less CPU time.
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The loading rate often can be increased somewhat, as long as the
solution does not localize. If the loading rate is increased too much, inertial
forces adversely affect the solution.
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Mass scaling is an alternative to increasing the loading rate. When
using rate-dependent materials, mass scaling is preferable because increasing
the loading rate artificially changes the material properties.
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In a static analysis the lowest modes of the structure dominate the
response. Knowing the lowest natural frequency and, correspondingly, the period
of the lowest mode, you can estimate the time required to obtain the proper
static response.
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It may be necessary to run a series of analyses at varying loading rates
to determine an acceptable loading rate.
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The kinetic energy of the deforming material should not exceed a small
fraction (typically 5% to 10%) of the internal energy throughout most of the
simulation.
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Using a smooth step amplitude curve is the most efficient way to
prescribe displacements in a quasi-static analysis.
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Import the model from
Abaqus/Explicit
to
Abaqus/Standard
to perform an efficient springback analysis.