This report provides comparisons of creep-buckling calculations and provides guidance on
approximate methods which are feasible for design. This report includes a discussion of the various
creep models, presents creep buckling analysis techniques, and provides several comparative example
calculations.
The techniques discussed in this report include:
1. Baseline analysis. Finite element creep analysis with different creep models and full non-linear
strain-displacement (geometrical) analysis.
2. Critical strain technique. Elastic buckling strain defines the creep buckling strain.
3. Tangent/secant modulus approaches. Combinations of tangent and secant moduli of the
isochronous stress-strain curve are used in calculations that reduce to elastic buckling calculations
in the elastic case.
4. Use of an isochronous stress-strain curve in a limit/instability analysis of the imperfect structure.
An instability (buckling) analysis would be in principle the same as Technique 3, and should
generate the same answer. Adding plastic collapse as a failure mode ensures that the yield
strength of the structure is not exceeded. This analysis therefore reflects the failure modes which
are covered by the baseline technique.
| File Size : | 1
file
, 1000 KB |
| ISBN(s) : | 9780791831748 |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 31 |
| Published : | 09/03/2008 |
