Verification by comparison of independent computer program solutions. [Creep problems relevant to nuclear structures]

Partial computer program verification can be obtained by the comparison of available independent computer program solutions. Time-consuming questions which commonly arise during such comparisons relate to the exact description of the problems that were used in previous solutions and to the confidence that can be placed in the previous solutions. This paper provides elastic--plastic-creep problem solutions which developers of computer program capabilities can depend on to be valid implementations of current nonlinear material models and solution schemes. Confidence in the solutions reported is provided by recording results from four or five independent computer programs for each problem. Programs used include CHERN, CREEP-PLAST II, PLACRE, CREEPABSA, ANSYS, and ADINA. Complete problem descriptions are documented, so that the solutions can be duplicated on additional programs. Five problems are reported. 15 figures, 22 tables.