Efficient higher-order cycle jump integration of a continuum fatigue damage model
| Autor: | Jörg F. Unger, Thomas Titscher |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Continuum (topology) Mechanical Engineering Fatigue Problem Fatigue damage Industrial and Manufacturing Engineering Mechanics of Materials Modeling and Simulation Ordinary differential equation Jump Applied mathematics Order (group theory) General Materials Science State (computer science) |
| Zdroj: | International Journal of Fatigue. 141:105863 |
| ISSN: | 0142-1123 |
| Popis: | Simulating high-cycle fatigue with continuum models offers the possibility to model stress-redistributions, consider 3D-stress states and simplifies extensions to multi-physics problems. The computational cost of conventional cycle-by-cycle time integrations is reduced by reformulating the fatigue problem as an ordinary differential equation for the material state and solving it with high-order adaptive time integration schemes. The computational cost of calculating the change of the material state in one cycle is further reduced by a high-order fatigue-specific time integration. The approach is exemplarily demonstrated for a fatigue extension of the implicit gradient-enhanced damage model in 3D and compared to experimental Wohler lines. |
| Databáze: | OpenAIRE |
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