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Local strain redistribution corrections for a simplified inelastic analysis procedure based on an elastic finite-element analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hwang, S. Y. Kaufman, A. |
| Copyright Year | 1985 |
| Description | Strain redistribution corrections were developed for a simplified inelastic analysis procedure to economically calculate material cyclic response at the critical location of a structure for life prediction proposes. The method was based on the assumption that the plastic region in the structure is local and the total strain history required for input can be defined from elastic finite-element analyses. Cyclic stress-strain behavior was represented by a bilinear kinematic hardening model. The simplified procedure predicts stress-strain response with reasonable accuracy for thermally cycled problems but needs improvement for mechanically load-cycled problems. Neuber-type corrections were derived and incorporated in the simplified procedure to account for local total strain redistribution under cyclic mechanical loading. The corrected simplified method was used on a mechanically load-cycled benchmark notched-plate problem. The predicted material response agrees well with the nonlinear finite-element solutions for the problem. The simplified analysis computer program was 0.3% of the central processor unit time required for a nonlinear finite-element analysis. |
| File Size | 1156291 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850012086 |
| Archival Resource Key | ark:/13960/t7mp9x63x |
| Language | English |
| Publisher Date | 1985-03-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Finite Element Method Nonlinear Equations Stress-strain Relationships Stress Distribution Cyclic Loads Mechanical Properties Thermal Cycling Tests Inelastic Stress Elastic Properties Computer Aided Design Computer Programs Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
