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The two types of analysis available in BOSOR5:
INDIC = 0 means nonlinear axisymmetric analysis including moderately large deflections, plasticity and creep;
INDIC = -2 means nonlinear axisymmetric analysis with computation of the stability determinate at each quasi-static time step.
Quasi-static time is used with BOSOR5 because:
1. There may be creep of the material, and
2. Different load components in a given case may vary differently in time, such as a case in which fabrication states are computed starting at time = zero, followed by applied loads starting after completion of one or more fabrication cycles.
(from page m3 of the report, LMSC-D407166, December, 1974)
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